JBL GTS100 Stereo Amplifier User Manual
Contents
1. AA PS anar Ln tI l IER L P 9 LINE INPUT MODE SPEAKER CROSSOVER SPEAKER e i u i i INPUTS 1 L OUTPUTS FUSE 20A i een E y aa 20A J mho omt ag SISI L amore cu O S al oa ae E mi GLU ULU A rower ir ne R ll death D E Line Level RCA Inputs Fuse 2 Line Selector Battery Ground Gain Control O Remote Turn On Power Input Mode Connector Speaker Input Connector Battery In J Crossover Mode Selector Speaker Output Connector oe eee aa ARA lt Be He INONODNAadi LD E N US Y H H gt POWER A D E o E Power Indicator 6 Crossover Mode Selector This switch controls the built in crossover Set the switch to Off for full band operation Set this switch to Low to activate the 80Hz low pass filter on the amplifier for subwoofer use Set the switch to High to activate the 100Hz high pass filter for use with satellite speakers Note that the filter does not affect the line level outputs on the amplifier 7 Fuse 20 Amp ATC type Fuse 8 9 10 Power Connector Connection for included power wire har ness See Power Supply Connections on page 14 and the wiring diagram on page 13 for information on2. a gt a an Rear Satellite Front Satellite Speakers LJ L R System 5 Add a Second Os ee oo Subwoofer Amplifier Front Outputs Preamp output to preamp input Rear Outputs For the ultimate in bass output add a GTS100 GTS100 GTS100 GTS100 second subwoofer amplifier for a total system power of 340 Watts RMS Note the cross linking of preamp inputs for the two subwoofer amplifiers to provide non fading bass Next Step Add additional amplifiers in bridge mode to the front and rear main speakers Then add electronic crossovers and biamp front and rear speakers bl TES 19 d El Ses B AN E a gt a gt Rear Satellite Subwoofers Speakers LL R R Front Satellite S R 26
3. Rear Full Range Speakers Subwoofer 25 System 3 Add a Second GTS100 Rear Outputs Get more power and system Front Outputs Preamp output to preamp input control by adding a second GTS100 GTS100 GTS100 to power the main speakers and subwoofers b e El d individually Use the built in S S crossover to high pass the X front speakers and low pass U U d the subwoofers B Next Step Front Satellite Ful Range Add power to the Rear Full Speakers Speakers Range Speakers L L R JLR Note For Non Fading ds bass also connect the rear channel head unit speaker output to the speaker level input of the subwoofer GTS100 System 4 Add Power to the Rear Add an amp for the rear speakers for higher volume capability and more control Next Step P Add more subwoofer power Eh O Front Outputs Preamp oulpu GTS100 GTS100 E S19 S19
4. In Case of Difficulty Power on light does not come on Remote on light is illuminated but no sound is heard from some or all of the speakers Head unit not on turn the head unit on Ground wire is disconnected or defective check for continuity with an ohmmeter between the GTS100 s ground terminal and a known chassis ground point Battery wire is disconnected or defective check for approximately 12 volts between the GTS100 s Battery and Ground terminals Blown fuse check the GTS100 s 20 amp fuse located on the endpanel near the power connector If it is blown replace it with an identical one If the new fuse blows immediately then check all the wiring connections If no fault is found consult your JBL dealer Remote on wire between the head unit and the GTS100 is disconnected or defective check for 12 volts between the GTS100 remote on wire and the ground wire with the head unit on Head unit connected to speaker level input is not BTL high power type and no remote wire is connected connect remote turn on wire to switched 12V source Incorrect switch settings make sure that all switches input mode line and crossover are in their correct positions for your system configuration Incorrectly connected or shorted speaker wires check for shorts in wiring Defective or disconnected audio cables check for continuity and replace if necessary 27 continued Remote on light is illu
5. 1 Er ando BRA Speakers Application 4 Bi amplified System Using Speaker Preamp Output Capability Level E mmaa reamp Preamp Put L AYR Output R L R input b ld L a d Amp Crossover Input Mode Line 5 3 Switch Switch Switch X X A High Stereo Out STS100 p ld GTS100 l d B Low L R In B L R Stereo Subwoofers may be used by configuring 4 Ohm GTS100 B as shown in Application 1 or Subwoofer by using dual GTS100s as shown in E Application 2 Installation Precautions Before beginning the installation of the amplifier read the following precautions carefully Failure to heed these warn ings could result in personal injury or damage to property e The GTS 100 should be installed only in vehicles that have 12 volt negative ground electrical systems Connection to other types of electri cal systems may damage the ampli fier and or the vehicle s electrical system e Before beginning the installation dis connect the negative ground cable from the vehicle s battery This will prevent accidental short circuits while working on the installation Reconnect the cable only after the installation is complete and the wiring has been carefully checked to be sure there are no exposed wires or short circuits and everything is properly and securely connected Note If the vehi cle s radio features a code type secu rity system make certain you know the code before disconnecting the battery Work
6. Add a GTS100 to the main usually front outputs of an existing head unit Secondary speakers usually rear fill connect to the head unit s internal Froni Rear Outputs amplification Pl q Next Step Front ers Add a second GTS100 to Full Range amplify the other set of Speakers speakers or a subwoofer L L R JLR see System 2 t i System 2A Add a Subwoofer Active Use the GTS100 to drive 1 or 2 subwoofers with the head unit powering the main speakers This is an excellent way to upgrade a good stock system Front Outputs Next Step Add power to Front Full Range EN E Speakers see system 3 Full Range Full Range Speakers Speakers 1or2 Subwoofers System 2B Add a Subwoofer Passive Use the GTS100 in Simultaneous Stereo b Mono mode to drive main El speakers with subwoofers A passive crossover is N GTS100 a Froni Rear Outputs needed for this as described f on page 18 Next Step Add a second GTS100 to power subwoofers and main speakers individually see system 3
7. mode switch set to stereo When using two sources both the speaker and preamp level inputs may be used simultaneously Be sure to maintain left and right channel consistency Bridged Mode Operation To select bridge mode operation set the input mode switch in either the R only or L R position In the R position sig nal from the right channel input is fed to both amplifier channels In the L R position the signal from both channels is summed internally When using a sin gle GTS100 for mono mode fed with a stereo signal it is best to use the L R mode When using a GTS100 for each channel or when feeding a single GTS100 with a mono signal from an outboard crossover use the R mode and connect your source input to the right channel input Simultaneous Stereo Mono For this connection the Input Mode switch is left in the stereo position Main speakers are connected normally to the left and right stereo outputs and a center channel or subwoofer speaker is con nected in bridged mode Refer to the diagram on page 19 in the Speaker Connections section for details Speaker Level Input Connections When speaker level signal is used to drive the GTS100 the signal goes into the amp through a special four wire harness connector see the Controls and Connectors section If extension wires are needed between the head unit output and the amplifier unit use conventional spe
8. and oil resistant 10 gauge or larger stranded copper automotive wire and crimp or solder and insulate the wire to wire connections Keep the extension wire as short as possible Solder or crimp a terminal on the end of the extension wire and connect it to the frame or battery terminal gt When multiple amplifiers are installed in the system it is often best to ground all of the amplifiers and signal processors to the same point to pre vent noise pickup from a ground loop In some unusual installations the noise level will be lower if the amplifier or amplifiers are grounded to the same point that the head unit is grounded Use of heavy gauge 14 wire for all grounding even signal processors and head units can also help to minimize possible noise pickup Remote Turn On Wire Blue with White Stripe Because the JBL GTS100 includes Common Sense 2 way turn on circuitry you have two options for remotely activating the amplifier When using the speaker level inputs with a head unit that includes a BTL power amp it is not necessary to connect the remote wire The amplifier will automati cally activate whenever you turn on the head unit If the head unit is not of the high power BTL type Common Sense will not work You will need to connect a remote wire as discussed below If you are using the line level inputs follow the remote wire connections listed below The remote power control system turns the GTS100 off when
9. in an area that is well ventilated e Wear eye protection whenever cut ting drilling or filing any parts of the vehicle e Wear ear protection when using high speed drills saws sanders or grinders We want you to be able to enjoy the system once it is installed e Before cutting or drilling any holes in the vehicle inspect the area carefully to be sure there are no electrical wires hydraulic brake lines fuel lines or fuel tanks that may be dam aged while doing so Such compo nents may be hidden within double walled panels or structural mem bers of the vehicle so be extremely cautious Do not bypass or modify the fuse on the chassis of the amplifier Do not replace the fuse with one rated for higher current levels Doing so could result in damage to the amplifier and the vehicle s electrical system Repeated blowing of the power supply fuse indicates a fault within the amplifier or problems in the installation An additional power supply fuse not included should be located as close as possible to the battery on the 12V wire to minimize the chance of electrical system damage or fire in the event of a short circuit in the power supply wire Physical Installation There are several factors to consider when selecting a mounting location for the GTS100 It must be solidly mounted in a place where it will not be subjected to excessive shock and vibration Under no circumstances should the amplifier b
10. nal wires from power supply wires or vehicle wiring harnesses as much as possible When signal wires and power wires must cross try to keep them per pendicular Avoid routing any wires near accessories such as ignition con trol modules tachometers fuel pumps or fan motors The line level inputs of the GTS100 accept standard phono plugs also called RCA plugs The outputs of most head units equalizers or crossovers also accept RCA connectors If another type of connector is used adapters or special cables may be needed Proper wire and connectors can be obtained from any JBL authorized installation specialist 15 NOTE The GTS100 has a built in 80Hz low pass subwoofer crossover and a 100Hz high pass satellite crossover Be sure the crossover switch is properly set for the chosen system configuration See the Typical Applications section for suggestions If you have any ques tions about how to set this switch con tact your local JBL dealer Input Mode Switch This switch is set according to the num ber of input channels connected to the amplifier and the desired mode of oper ation See diagrams on pages 7 and 8 and the descriptions below for options Standard Operation When using the GTS100 as a conventional stereo amplifier simply connect the preamp level source outputs directly to the two gold RCA connectors or connect the head unit speaker outputs to the speaker level inputs with the input
11. on No other switches or relay boxes are needed When using this setup it is also possible using the wiring setup shown below to allow either of the two sources to remotely turn on the amplifier This is not necessary if the factory radio is of the high power BTL type and is con nected to the speaker level inputs The Common Sense turn on circuit will acti vate the GTS100 when a powered source is used and the conventional remote connection of the preamp level source will activate the amp when it is used Dual Source Remote Wiring diagram 14001 From Head Diode Unit 1 Remote or L T Antenna Output To GTS100 Remote 1N4001 From Head Diode Unit 2 Remote or Ei Antenna Output Speaker Connections When connecting speaker wires be sure that no uninsulated wire remains exposed and no loose strands of wire touch either an adjoining wire terminal or a metal surface Securely crimp or solder all connections and insulate them with heatshrink tubing Use high quality 18 gauge or larger speaker wire for the amplifier to speaker connections Larger wire or special high performance speaker cables may improve the performance of some systems Be very careful when speaker wire is routed through a door hinge area to door mounted speakers Use grommets and strain reliefs wherever necessary to prevent damage to the wires The proper speaker connection depends on whether the GTS100 is used bridged or stereo Th
12. speakers are driven by head unit or JR i L R additional amplifier H L z ly i V a NO al 3 Dual Amplifier GTS100 IGTS100 Subwoofer operation Stereo A i B Amp Crossover Input Mode Line P g in f A ji 1 Switch Switch Switch 1 A B Low R In L R l L R Full Range Operation Stereo ohi L ehn l Amp Crossover Input Mode Line Full Range Full Range l Switch Switch Switch Speakeror 1 Speaker gr 1 Subwoofer Subwoofer A B off R In i Application 3 Bi amplified Three channel Subwoofer Satellite System L Preamp or R Amp Crossover Input Mode Line Speaker Level Switch Switch Switch Input A High Stereo In S T SI B Low L R In GTS100 N ld GTS100 N LU A B A Stereo Subwoof be used by configuri Hr a ki ereo Subwoofers may be used by configuring i GTS100 B as shown in Application
13. with line inputs works well for this Listen to see if the noise is present in the signal from the source unit If so consult the manufacturer of the source unit or your JBL dealer for help in elim inating this noise If there is no noise in this signal it can be eliminated as the source of the noise in your system Ground Loops The vast majority of noise problems in car audio systems are caused by inadequate or improper grounding The head unit the amplifier and any other components must be grounded to a major metal member of the vehicle s frame Make sure to choose a solid metal ground point In many new vehicles some structural ele ments are made of plastic Although not usually necessary practi cal experience shows that often the noise level in the system will be lower if the amplifiers and signal processors are all grounded to the same point on the chassis Usually the head unit does not need to be grounded to the same point as the rest of the system but in some instances grounding the head unit to the same point will also help If this does not adequately reduce the noise level try another ground point on the car frame Some ground points may work better than others In some in stances with plastic bodied vehicles grounding the source unit and or amplifier directly to the battery will provide the best results although usually this provides the worst results with most cars In complex systems involving com
14. 615100 2 1 CHANNEL AUTOMOTIVE POWER AMPLIFIER OWNERS MANUAL Table Of Contents sis eis sie Te eel ta ie 3 e E 4 About Installation dial ore 4 Quick Stats usa tia ia 5 System Design Using the GTS100 ooococonccconccinnccionccancnnnncconanonnnannnnonncnnnnnnns 6 Typical Applications icono aai 7 Installation Precauti0NS ooooncccnncnnnonncccnncannccnnncnnnrnnnnnccnrrcn arca rara nc 9 Physical installato aii 9 Controls and COnnectors T 10 MountingIASTUCIONS dcir 12 OIT Te Sitios ect ada T 12 Power Supply Connections ona 14 Audio Input es niaes 15 Speaker Connections sese sere eee eee eee ereenn 17 Operations aia dad 20 Solving Noise aie 21 MaltonancO cisco oil 24 Additional System Configurations for Add On or Upgrade sss sss 24 In Case Of S n 27 SECIICAU ONS H H aan 29 Owner s Warranty Information Records Model Number Serial Number Dealer Name City State Zip Sales Receipt Number Date of Purchase Introduction Thanks for purchasing your new GT series automotive amplifier The GT series amplifier you have chosen includes many unique features to enhance its performance and utility The power amplifier circuitry is a fully discrete design notable for low distortion and unusually clean and clear reproduction quality Your GT series amplifier will easily connect to virtually any car audio system whether it is factory installed or purchased separately In addition to conventio
15. D Tuner CD Player Head Unit or Changer Of mo O o 000O0O Antenna Input ES CD Input Power Cassette Receiver Antenna Power Supply Wires Power Cassette CD Preamp Output Amplifier Antenna a a Power Relay cr ot Connection J s 5 a LELE o 5 ol r 5 d SISI a 2 iTM A E ef 33 z ELO a amp 50 28 y Tol S cf 5 23 2 Za 3 5 2 oa SI g amp Z o Se Amplifier bd a E g a Speaker a evel ifi Input Amplifier 2 npu Speaker y Output G G Connection A Speakers F eakers Blue w White Stripe Remote On Off Mr Eo LT Ignition Switch _ R 20 Amp Not Included Eise Yellow S Main 12V Vehicle Battery Black Power Ground Chassis Ground 13 Power Supply Connections The power input and remote turn on wires are connected to the GTS100 via the power connector on the end of the amplifier Use the included wire harness for connections In some cases such as a custom competition installation you may wish to make your own custom power harness The part number of the mating connector and terminals is listed in the specifications section of the man ual and is a common part available at many electronics parts retailers Please do not call JBL for this we stock only the pre made harness as supplied with the amplifier 12V Battery Wire Yellow e Connect the yellow wire directly to 12 volt terminal of the battery e If itis necessary to extend the power wi
16. ND WOW T power Center Channel Speaker Minimum 8 Ohms Main Speakers Minimum 4 Ohms When Used Simultaneously Stereo Non Bridged Speaker Connection 4 Q Minimum 4 Q Minimum peeeeassss 19 Operation Before operating the GTS100 recheck all wiring connections to make sure they are correct and secure Be sure that a 20 amp fuse not included is installed in the 12V line next to the battery Reconnect the negative ground terminal of the battery Make sure that the input mode selector crossover switch and preamp mode switch are properly set Gain Adjustments The setting of the gain control on the GTS100 is important to ensure proper performance low noise levels and maximum reliability in the system As a general rule controls on components at the front end of the system Source equalizers electronic crossovers etc should be set as high as possible with the amplifier gain control set as low as possible while still providing ade quate volume levels Using a high sig nal level from the source and a low gain setting on the amplifier will help keep background noise levels in the system low To adjust a system using a single amplifier start with the amplifier
17. Pass Crossover e No Current Limiting e Oversized Floating Rail MOSFET Switch Mode Power Supply e Common Sense 2 way Turn On e Stealth Remote Silent Turn On Circuitry with Power On Indicator e Continuously Adjustable Gain Controls e Capable of Single Ended Operation Into 2 Ohm Loads e Fully Complementary Direct Coupled Discrete Power Amplifier Circuitry e Gold Plated RCA Input Connectors e Preamp Output Capability e Convenient Easy Disconnect Power and Speaker Connections e Third Order 18dB per Octave Capacitive Inductive Power Supply Filtering e Input Mode Switching e Made in USA About Installation Although the GTS100 was designed to make installation as easy as possible it is a sophisticated product that requires proper installation to realize its full per formance potential Skill with tools an understanding of basic electronics and experience with car stereo installation are needed to properly install these amplifiers If you feel you do not have the necessary knowledge and skills we strongly recommend that the instal lation be done by your authorized JBL dealer If the GTS100 is installed by a qualified JBL dealer we will double the length of your warranty to two years from date of purchase If you choose to install the GTS100 yourself read all of the information in this manual before you start the installa tion Pay particular attention to the safety precautions and notes It will sa
18. aker wire Keep the wiring inside the passenger and trunk compartments and make the wires as short as possible All connections should be securely crimped or soldered and insulated with heatshrink tubing Use the color code of the input harness wires and the identification on the radio tape deck output wires to be sure that left and right channels are correctly connected and the positive negative polarity of each channel is connected correctly For example the left positive output of the head unit must be con nected to the left positive input of the GTS100 The color code for the speaker level input harness is as follows 16 Speaker Level Input Color Codes Left White Left White with Black Stripe Right Gray Right Gray with Black Stripe Using Both the Speaker Level Input and Line Level Input Together In some systems it may be desirable to use both the speaker level inputs and line level inputs simultaneously For instance if you have a stock head unit in your car you may connect the speaker level inputs of the head unit to the GTS100 You may simultaneously con nect a CD player equipped with preamp volume control to the preamp level inputs of the GTS100 The Universal Interface circuitry of the GTS100 will isolate the inputs from each other while mixing both signals Therefore switch ing from one source to the other is as simple as turning the unused source off and turning the desired source
19. e most common basic system configurations using the GTS100 More elaborate systems are formed by using a combination of these building blocks For additional ideas refer to the Add On and Upgrade Section near the end of this manual Application 1 Stereo Full Range or Subwoofer Operation Full Range Operation Crossover Input Mode Line Switch Switch Switch Off Stereo In Subwoofer Operation Crossover Input Mode Line Switch Switch Switch Low Stereo In Main speakers are driven by head unit or additional amplifier GTS100 Om looL Preamp or L Speaker Level Input R 2 or 4 Ohm Full Range peakers or Subwoofers Application 2 Bridge Mode Operation Single Amplifier Subwoofer Operation Mono ete eno ye Amp Crossover Input Mode Line Preamp or Speaker Level For Single Amplifier i i i For Dual Amplifier L 1 Switch Switch Switch Ful Range or Subwoofer Use 1 Subwoofer Use B Low L R In Main
20. e mounted where it will be exposed to moisture or extreme heat Try to mount the amplifier where the main 12 volt power supply wire which must be connected directly to the battery can be kept relatively short e The GTS100 must be mounted in a place where air can circulate around the fins on the chassis Good air circulation around the amplifier will make it operate at lower tempera tures and reduce the chance of the thermal protection circuits being trig gered The installation positions that provide the most efficient air circula tion around the amplifier are shown below e Use a mounting location that allows access to the wiring connections and level adjustments This allows the unit to be mounted before these con nections and adjustments are made If the amplifier must be mounted in an inaccessible location it may be easier to mount it after the wiring connections and level adjustments are complete BEST Vertical Mounting AIR FLOW CTS ee EN GOOD Horizontal Mounting AIR FLOW NEVER Mount Upside Down Controls and Connectors 1 Line Level RCA Inputs Use these connectors for line preamp level input to the amplifier When speaker inputs are used this connector can be con verted for use as a line level out
21. e speakers are connected to the amplifier with the included wire harness If you wish to purchase the raw connector to make a custom length harness the part number is listed in the Specifications section This item is commonly available from local electronic parts distributors 17 Please do not call JBL for this part we stock only the harness assemblies as supplied with the amplifier To get proper bass response and stereo imaging all the speakers in the system must be in phase The inputs terminals of the speakers will be marked in some way to identify positive and negative polarity Make sure that the positive speaker terminal is attached to the positive amplifier connection in every speaker to amp connection All two conductor speaker wire has one conductor marked in some way so it can be easily traced The speaker output wire harness color codes are listed below Speaker Output Color Codes Left White Left White with Black Stripe Right Gray Right Stereo Connection Connect each speaker directly to the speaker output harness according to the color code listed above The input mode switch should be set to STEREO Bridged mode Connection Connect the loudspeaker positive terminal to the RIGHT channel positive wire Gray Connect the loudspeaker negative terminal to the LEFT channel negative wire White with Black stripe The input mode switch should be s
22. els The fuse size for the GTS100 is 20 amps Exceeding the standard fuse size or bypassing the fuse holder will void the warranty and may cause serious damage It is extremely rare for this fuse to blow If it blows repeatedly it is most likely that the amplifier has an internal problem that will need to be repaired by an authorized service cen ter The only external cause for this fuse to blow is reversed polarity of the power wire connections Solving Noise Problems The power supply system of every vehi cle has some electrical noise that is generated by the ignition system the alternator the accessories and their wiring High performance audio equip 21 ment is more likely to pick up such noise than conventional equipment because it has wide frequency band width and high gain amplification cir cuits The GTS100 has built in power supply filters to help prevent noise prob lems If noise occurs it is probably the result of improper installation The following suggestions will help you eliminate most noise problems Source Noise Often noise in a system is picked up by the signal source Before attempting to eliminate noise from the amp be sure it is not being picked up by the signal source and then passed on to the amp To do this con nect the signal source output to an external amplifier which has no other connection to the vehicle except for the audio signal leads A battery powered portable
23. et to R or L R Simultaneous Stereo Mono Connection The GTS100 may be used to drive a stereo pair of speakers with a mono bridged speaker at the Gray with Black Stripe same time This is sometimes used for center channel applications or for inex pensive subwoofer addition essentially creating a 3 channel system However unlike a true bi amplified subwoofer connection this system configuration does not provide for control of sub woofer satellite balance it requires the use of a passive subwoofer crossover instead of the superior active circuitry already built in to the GTS100 and it does not separate the power amps driving the satellites from the amps driving the subwoofer Therefore this connection is best used for addition of a center channel or as an interim step as you build up to a true bi amplified subwoofer satellite system Connect the main pair of stereo speakers as in the stereo mode connect the mono speaker as described above for bridge mode connection see diagram on page 19 For use in center channel applications a high power L Pad or power fader can be used to attenuate the center channel for proper level matching For subwoofer satellite use connect a non polarized capacitor in series with each main speaker and a high power inductor coil in series with the subwoofer Your authorized JBL dealer will help you choose the correct values for your par ticular components The input m
24. her by soldering with heatshrink tub ing insulation or with high quality crimp type insulated connectors installed with a good crimping tool Soldering crimp connections is recommended to further enhance connection reliability Never use wire nuts insulation displacement connectors i e ScotchLok type or twist and tape connections Do not use electrical tape it will loosen with age and extreme temperatures Never leave bare wire exposed Route the wiring through the car care fully Do not allow wires to lay against sharp sheet metal edges or any other surfaces that might wear away or cut through the insulation of the wire Use insulated strain reliefs rubber grom mets and plastic tubing to protect the wires whenever they are run through sheet metal panels or are placed where they might be pulled or damaged 12 UBL Typical System Configuration Cassette CD Tuner Speaker Level Output Connection Use only when line level ouput is not available Cassette C
25. ing order 1 front channels 2 rear chan nels 3 subwoofers Complex systems incorporating tri or quad amplification can be time consuming to adjust Your local authorized JBL installation special ist is the best person to help with such adjustment Other Characteristics Turn On Delay When installed as described in this manual the GTS100 will turn on and off with the head unit or the vehicle s ignition switch When the amplifier is turned on there is a time delay of several seconds longer in cold 20 weather before the amplifier will pro duce sound This eliminates the chance of annoying noises produced by the radio or signal processors being ampli fied and passed to the speakers when the system is first turned on Power Consumption Operating the GTS100 when the vehicle is not running may discharge the battery Under nor mal operating conditions the units will draw an average of 5 amps from the battery At high volumes the amplifier can draw as much as 20 amps for brief bursts After even a short period of time this current drain can discharge the battery to the point that it will not start the vehicle Power consumption under no signal conditions is less than 1 amp for the GTS100 Even this small power usage can discharge a battery over several hours time When the GTS100 is turned off there is no cur rent drawn from the battery despite the direct to battery power connection Overload Pr
26. ing is important to keep noise low and is explained in the Gain Adjustments section of this manual page 20 Thanks to Universal Interface circuitry the GTS100 can also be connected to power amplifiers radios or equalizers that are equipped with only speaker outputs by connecting them through the speaker level input connector Inside the GTS100 the speaker level and preamp level inputs are connected through a mixing circuit which allows them to be used simultaneously Therefore a low level source such as a CD player equipped with preamp controls Volume Balance Bass Treble may be connected to the pre amp level inputs at the same time as a powered radio tape unit is connected to the speaker level inputs This provides a higher performance alternative to an FM Modulator connection when you wish to add CD capability to a factory installed cassette radio Switching from one source to the other is as simple as turning the desired source on and turn ing the undesired one off no addi tional switches or relay connections are needed Typical Applications Other Components The system options of the GTS100 are numerous All JBL amplifiers are designed with sufficient adjustment range to match with the accepted nor mal voltages and impedances used by virtually all car audio components With very few exceptions the GTS100 will match correctly to any equipment you already have The following diagrams show th
27. input sensitivity controls fully counterclock wise Some radio tape decks have addi tional output level controls or switches Set those to their maximum position Set the level controls on any associated equipment such as equalizers and electronic crossovers to the maximum position or as recommended by the manufacturer Set all Bass Treble or equalizer controls to their centered or bypassed positions While listening carefully to the system output adjust the volume control of the radio tape deck to the point where you first begin to hear audible distortion Reduce the level just to the point where the distor tion goes away This is the maximum undistorted output level of your head unit and signal processors and should not be exceeded during use If audible distortion does not occur continue to increase the level until the head unit is turned all the way up If this setting does not provide adequate volume lev els gradually increase turn clockwise the gain control of the GTS100 until the system plays as loud as necessary or when the first signs of distortion are heard When multiple amplifiers are used in the system it is best to adjust the gain of the amplifier driving the main usually front speakers first Then turn down the head unit s volume control to a comfort able level and adjust the remaining amplifiers for the desired system bal ance You will find this easiest to do by adjusting the amplifiers in the follow
28. minated but no sound is heard from some or all of the speakers Alternator whine through the audio system with the engine running Bass output from speakers too low Incorrect gain adjustment verify that the GTS100 gain controls are not turned completely down If they are sound output level may be very low and may give the impression that the system or part of the system is dead Defective head unit or signal processor check each component for proper wiring and operation Defective GTS100 If there is audio signal present at the inputs of the GTS100 and there is no output the GTS100 may be defective Ground loops Follow the wiring suggestions in the section called Solving Noise Problems Also verify that the chassis grounding point you have chosen is true ground by checking for continuity between the chassis ground point and battery ground Speaker wired out of phase check for proper polarity on all speaker wiring amp terminal to speaker terminal and amp terminal to speaker terminal If you want to talk to us about any problems call JBL Customer Service at 1 800 336 4JBL Between 9AM and 5PM Eastern time 28 Specifications Continuous Power Output 20Hz 20kHz 14 4V Battery Voltage Signal to Noise Ratio Frequency Response Damping Factor Slew Factor Line Level Input Sensitivity for rated power Line Level Input Impedance Speaker Level Input Impedance Speaker Le
29. nal preamp level inputs this model features JBL s Universal Interface design which facili tates simple connection to factory radios with the low distortion that is usu ally only associated with preamp level connection With Universal Interface a factory radio can be used either as the main music source or combined with a CD changer which includes volume control capability simultaneously connected directly to the amplifier By providing this two unit direct connec tion Universal Interface circuitry elimi nates the need for an FM modulator to connect a CD player to factory radios improving the fidelity of digital playback Also when using a high powered BTL radio through the speaker level inputs Common Sense turn on circuitry senses the common mode voltage present on the radio s speaker wires and turns the amplifier on without an additional remote wire When the speaker level inputs are used exclu sively the preamp level inputs may be converted to preamp level outputs to drive additional amplifiers or signal processors In addition the built in active crossover provides either high pass or low pass operation This lets your GT series amplifier power either subwoofer or main speakers in a bi amplified system without the expense of an additional crossover Features e Bridgeable 2 1 Channel Operation e Simultaneous Stereo Mono Operation e Built in Staggered 18dB Octave 100Hz High Pass and 80Hz Low
30. not in use to pre vent discharging of the vehicle s bat tery When 12 volts is applied to the remote wire the amplifier is turned on A red LED on the end panel of the ampli fier lights whenever the amplifier is on If the head unit has a 12 volt automatic antenna or amplifier remote activation wire connect it to the blue white wire of the GTS100 Some head units have no automatic antenna or power amp activation wire Other decks have automatic antenna wires that are on only when the radio is used the 12 volt signal is off when a tape is played In such cases connect the remote turn on wire to an unused accessory terminal in the fuse block or any other 12 volt source that is turned on and off with the vehicle s ignition switch The remote on off system draws negligible current so a relatively small 18 or 20 gauge extension wire may be used Be sure to securely crimp or sol der and insulate the wire to wire con nections Audio Input Connections Line Level Input Connection Proper wiring between the signal source any other components in the system and the GTS100 will help to keep noise levels in the system low Use high quality low capacitance shielded wire Keep the wire as short as possible Do not splice shielded wires together Do not run audio signal wires alongside power wires either for the amp or the vehicle s standard power wires When wires are run for long distances separate the audio sig
31. ns Do not use electrical tape it will loosen with age and extreme temperatures Never leave bare wire exposed 4 Connect power wiring as shown in the Wiring Diagram on page 13 using the supplied power harness 11 12 13 14 Connect the outputs from the signal source to the appropriate inputs of the amplifier according to the Wiring Diagram page 13 with either high quality low level signal cables with RCA plugs with the supplied Speaker level input connector or both Connect the speakers to the ampli fier according to the wiring diagram on page 13 Turn the input sensitivity adjustment to the 1 4 position Set the input level switch to line if you are using the line level preamp inputs Set the crossover switch as desired Set the input mode switch to stereo left right or right input only operation Recomnect the negative battery cable Turn on the signal source at a low volume level and check for the correct output from each speaker Adjust the amplifier gain control using the procedure described in the Gain Adjustment section on page 20 Read the rest of the manual to get maximum use and enjoyment from your amplifier System Design Using the GTS100 Speakers When used in the non bridged mode the GTS100 can easily drive 2 ohm speaker loads When only one speaker is connected to each channel virtually any common speaker may be used When two
32. nt Run each wire individually Due to wire resistance connecting multiple wires to a single wire then running the single wire to the head unit is not the same 3 Connect all amplifier and isolated signal processor grounds directly to the vehicle chassis at the same point as each other but not necessarily to the same point as the head unit Power line Noise The built in power supply filter of the amplifier makes external filters unnecessary In some cases power supply noise can enter the system through the head unit power supply or the supply of an equalizer or other signal processor Putting a filter on the head unit or signal processor power supply input may then be helpful Power wires carrying high currents may induce noise in nearby signal wires Make sure that power wires and signal wires do not run together for long dis tances When power and signal leads must cross they should cross at right angles If you suspect that power line noise is being induced in the signal leads you can repeat the test for source noise described previously but perform the test at the amplifier end of the signal cables Other Noise Sources Common noise problems will be solved by proper grounding and power supply connec tions However there are many noise suppression devices such as spark plug and coil lead suppressers and rotor and coil bypass capacitors avail able at auto parts or car stereo stores There are also noise
33. ode switch should be set to STEREO 18 Simultaneous Stereo Mono Subwoofer Low Pass Connection Diagrams A Satellite Subwoofer Component Values for 4 Ohm Loudspeakers Tweeter Midrange Satellites High Pass Satellite High Pass Left Crossover Frequency 100Hz C 300uF Capacitor 100V Non Polorized c Subwoofer Low Pass Crossover Frequency 100Hz L 6 2mH Air Core Inductor pnt LI OOTI O AAN UNE INPUT MODE SPEAKER CROSSOVER SPEAKER ye NO OWT yy RR INPUTS OF HGH 20 FUSE 20A D L L J sia L Ja a 20A KO O o ROE i AH 0 Wy aa AA Low RIS BAT REM GND O q bt EWOW E pomer H ne BRIDGED 1 Sh You may scale the 100Hz values listed to a a desired frequency by using the following formulas 1 High Pass desired frequency in Hz x 300uF New Capacitor Value 100 Low Pass reg frequency in Hz x 6 2mH New Inductor Value Center Channel Bridged Speaker Connection B Center Channel 80 L Pad Optional But Recommended LO 1 E SPEAKEI CROSSOVER S LAR INPUTS OFF HIGH 0 J zie L ls rJe desk TE L0 Q FUSE 20A D 20A UO REM G
34. otection The GTS100 incorporates elaborate protection cir cuitry to prevent damage to the ampli fier circuitry and ensure reliable opera tion This circuitry will turn the amplifier off in the event of overheating a short circuit on the speaker output wiring or improper power supply connections If the amplifier cycles on and off or does not work at all a problem in installation or an abnormal electrical condition is indicated Check speaker wiring for short circuits or impedance loads signif icantly below 2 ohms 4 ohms in bridged mode Check the power supply voltage at the input of the amplifier to be sure that it is normal between 11 and 16 volts Check that the power wires are not reversed If the GTS100 is operated at very high power levels in a high ambient tempera ture situation the unit may not be able to radiate all the heat generated by such operation If the temperature of the amplifier reaches a level that could cause damage the thermal overload protection circuit will turn the amplifier off It will turn the amp back on again when it cools off Repeated activation of the protection circuits indicates that the system is being improperly operated or that the amplifier should be relocated to an area that either has a lower ambient temperature or that allows more air cir culation around the unit Fuse Replacement If the fuse on the GTS100 must be replaced DO NOT use a fuse rated for higher current lev
35. po nents from different manufacturers it helps to know the type of power sup plies used in each component For low level signal processors such as equalizers or electronic crossovers a manufacturer may either use a power supply which is isolated through a DC to DC converter or a simple regulated supply from the 12V vehicle battery Components using the latter type of supply can be identified by a direct con nection from power ground to the shield of the RCA jacks measured with no other connections present For these components the best ground connec tion may be one where the power ground wire is not connected at all The RCA cables will provide the ground connection to the source unit Please note that this is only appropriate for units which draw less than 500mA of current Higher power units of this type are best connected with their ground 22 wires connected directly to the chassis of the head unit The trickiest grounding task is created when some components of this type are mixed with other compo nents using isolated supplies For this type of system the following grounding scheme will usually work 1 Connect the head unit chassis to a solid vehicle ground using a short heavy gauge wire gt AWG10 Do not connect this to the vehicle s wiring harness but go directly to a metal part of the vehicle 2 Connect all non isolated signal processor grounds directly to the head unit chassis at the same poi
36. put by setting the Line switch to out 2 Line Selector This switch sets the line level connectors for either input or output Set switch to In for normal line level input operation Set the switch to Out to use the line level connector for line level outputs to drive other ampli fiers or signal processors when using the speaker level inputs 3 Gain Control Use this control to adjust the input sensitivity of the ampli fier See the Gain Adjustments section for tips on proper setup 4 Input Mode Selector This switch is used to set the input mode for both pre amp and speaker level inputs Set this switch to Stereo for normal operation using both left and right inputs Set this switch to R to drive both the left and right channels with only a single input on the right channel Set this switch to L R to sum the left and right inputs for a mono output on both amplifier channels 5 Speaker Input Connector Use this connector for speaker level input sig nals A wire harness is supplied for this connector See the Audio Input Connections section page 15 for wiring instructions This input also includes JBL s Common Sense input circuitry which turns the amplifier on as soon as a high powered head unit con nected to this input is turned on 10
37. re use 12 gauge or larger wire that is heat and oil resistant e The GTS100 will draw as much as 20 Amps from the vehicle s electrical system enough to overload conven tional vehicle wiring Therefore the 12 volt power supply must be directly from the positive side of the battery Do not connect to the vehicle s fuse block or to a wire feeding other accessories e To prevent electrical system damage or fire a fuse holder and fuse not included maximum 20A must be installed in the power supply wire as close to the battery as possible and before the wire travels through the firewall or other metal panel Ground Wire Black Proper grounding is extremely impor tant It has a significant effect on the overall performance and noise level of the system The ground wire must be solidly connected to a major sheet metal structure of the vehicle Usually the power supply ground wire can be connected to a sheet metal panel near the amp mounting location Scrape all paint and primer off the sheet metal at the grounding point to ensure a good electrical connection Attach the wire to the grounding point with a sheet metal screw and lock washer preferably a star lock washer or a bolt lock washer nut set In some vehicles such as those that have non metal bodies it may be necessary to extend the power supply ground wire and connect it to a frame rail or even directly to the negative terminal of the battery Use heat
38. rical ground of the head unit and or amp to a different point on the vehicle s chassis 3 Keep the amplifier power supply wiring away from the radio or antenna wiring 4 Wrap the 12 volt power sup ply wires for the radio tape deck with metallized shielding tape or ground braid and ground the tape to the chas sis of the vehicle Maintenance The GTS100 does not require any regu lar maintenance Periodically checking the main power supply and grounding points and terminal connections is advisable Be sure the connections are solid and corrosion free Loose or cor roded connections can cause annoying intermittent noise or unusual opera tional problems Do not allow dust to accumulate on the amplifier heat sinks It will reduce the amplifier s ability to dissipate heat Occasional vacuum cleaning will prevent dust accumulation Additional System Configurations for Add On or Upgrade The features and capabilities of the GTS100 provide tremendous system design flexibility The diagrams on the following pages illustrate some of the system possibilities They are in order of increasing complexity showing the way a system may be upgraded in logical steps Although the systems are shown using speaker level connection from the head unit they may be built using any combination of speaker or preamp level inputs depending on the capability of your head unit See pages 25 26 24 System 1 Add Power to Main Speakers
39. speakers are connected in parallel to a given channel each speaker must have a minimum impedance of at least 4 ohms to ensure that the com bined load does not drop below 2 ohms Although the amplifier will not be dam aged load impedances lower than 2 ohms will eventually cause the amplifier to overheat activating the protection circuits and causing the unit to shut off until it cools down sufficiently Parallel Wiring 2 Ohms a Nominal Impedance Series Wiring al 8 Ohms Nominal Impedance A L Gi When the GTS100 is in bridged mode the combined impedance of the speaker or speakers connected to the bridged channel should be at least 4 ohms As in the example above sustained opera tion of the GTS100 in bridged mode with less than 4 ohms will likely cause overheating If monaural operation is desired and two 4 ohm speakers are used it is best to connect each speaker to an individual amplifier channel and use the L R mode on the input mode switch to provide monaural operation The GTS100 must not be used with speakers that have either one of their input terminals wired to the frame of the speaker or to the chassis of the vehicle Signal Sources The low level preamp outputs of any radio tape deck CD player or preamp equalizer so equipped can drive the GTS100 The Gain control of the GTS100 is used to match the amplifier to the output voltage of the source This match
40. suppressers that can be connected directly to the alter nator that are effective in some situa tions The use of any such suppressors should be discussed with a JBL autho rized installation specialist Certain vehicles are particularly noisy espe cially models that have solid state igni tion systems or that have non metal bodies Such vehicles may require elec trical noise suppression devices which are not normally needed Antenna A common noise problem is generated by a ground loop produced by the antenna shielded cable being grounded at both the antenna mounting point and at the head unit input In this instance insulate the antenna ground from the chassis of the vehicle at the antenna mounting point so the antenna shield is grounded only at the radio s antenna input Commercial antenna ground loop isolators are also available Switching Noise The GTS100 has a highly developed switching power sup ply which generates some RF interfer 23 ence as a result of its switch mode operation Although this is internally filtered and shielded by the GTS100 chassis some unusually sensitive installations may pick up switching noise especially when listening to weak AM radio stations If this unusual situa tion occurs one of the following installa tion corrections will typically eliminate the problem 1 Relocate the amplifier to a position farther away from the radio or radio antenna 2 Move the elect
41. ve potential problems later if you take a few minutes to plan the com plete installation before you start The routing of wires the power supply con nection points and the mechanical installation of the unit should be com pletely thought out before you begin Work carefully and check each step as it is performed Before operating the amplifier recheck the entire installation to be sure that each connection is cor rect properly insulated and secure Quick Start Recommended for experienced professional installers only T Disconnect the negative cable from the battery Note If the vehicle s radio features a code type security system make certain you know the code before disconnecting the battery Mount the amplifier to the desired location using four screws Run a minimum AWG 10 power cable complete with a 20 amp fuse not included directly from the posi tive 12V battery terminal to the desired amplifier location Keep the fuse to within 5 of the battery terminal and before the wire runs through any metal partition Note All wiring connections should be made either by soldering with heat shrink tubing insulation or with high quality crimp type insulated connectors installed with a good crimping tool Soldering crimp connections is recom mended to further enhance connection reliability Never use wire nuts insula tion displacement connectors i e ScotchLok type or twist and tape connectio
42. vel Input Sensitivity Preamp Output Sensitivity Minimum Speaker Impedance Single Ended Non Bridged Bridged Built In Electronic Crossover Frequency and Slope Power Requirement Fuse Size Size L x W x H Weight Speaker Input Output Mating Connector Power Mating Connector 35 watts x 2 4 Ohms 0 05 THD 50 watts x 2 2 Ohms 0 08 THD 100 Watts x 1 4 Ohms 0 08 THD 100dBA 10Hz 50kHz 0 1dB 20Hz 20kHz 0 0 1dB gt 200 gt 5 100mV 4V RMS 500mV at center detent 10k Ohms 15 Ohms 200mV 8V RMS 1V at center detent 2V Out for 4V Speaker Level Input 2 Ohms 4 Ohms 80Hz 18dB per octave Low Pass Filter 100Hz 18dB per octave High Pass Filter 11 to 16V DC Negative Ground 20 Amp ATC Type Fuse 6 s x 9 4 x 2 168 3mm x 235 0mm x 50 8mm 4lbs 30z 1 90kg Molex Mini Fit Jr 39 01 2040 Metal Pins 39 00 0038 Plastic Housing AMP 1 480700 0 Metal Pins for Ground amp 12V AMP 350923 3 Metal Pins for Rem In AMP 350536 1 29 JBL Consumer Products Inc 80 Crossways Park West Y Woodbury NY 11797 JBL 8500 Balboa Blvd Northridge CA 91329 800 336 4JBL H A Harman International Company Part No JBLGTS1000M
43. wire color codes and proper connections 11 Speaker Output Connector Connection for included speaker output harness See Speaker Connections section on page 17 for information on wire color codes 12 Power Indicator LED Power indi cator light glows for normal operation when the amplifier is activated by either the remote or common sense turn on circuits 11 Mounting Instructions Place the amplifier in the installation location Use a pen or pencil to mark the four mounting screw hole locations Set the amplifier aside and drill the holes for the mounting screws Note If the surface you are mounting the amp to is covered with carpeting or uphol stery cut a small x in the material at each screw hole location before drilling the holes This will help prevent tearing or stretching of the material and carpet fibers from being pulled out Set the amplifier in position and align the mounting holes with the holes previously drilled Put washers on the four sheet metal screws provided and drive them into the mounting panel Tighten the screws evenly until the unit is solidly mounted Wiring Proper wiring of the GTS100 and the associated components is extremely important for proper performance and long term reliability Using the proper type of wire is very important If a spe cific type of wire should be used for a certain application it will be noted All wiring connections should be made eit
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