Rockford Fosgate 100X2 User's Manual
Contents
1. 3 WAV SVSTEM 18 L TREBLE GAIN IN IN BASS OUT 8 LI LT hlele Left Left 4 Right Right C 400 TT 2 5 C 400 TT 2 5 5 25 4 MID BASS 4 4 OHM MIDRANGE 1 DOME SPT 14RX W CROSSOVER 5 14 4 200 3 5 200 3 5 5 25 8 OHM MID BASS 4 8 OHM MIDRANGE 4 OHM WOOFERS 1 DOME SPT 18RX W CROSSOVER SPT 18RX 8 Right Channel COMPLETE SVSTEM 19 TROUBLESHOOTING Problem Connecting end caps when using large gauge wire Solution Cut the wire casing on the diagonal as shown in the following diagram Insertthe wire into the connector Twist the wire around so that the long end of the insulation faces up Bend the wire prior to tightening in place STRIP WIRE 2 Note For easier assembly only 5 8 1 89cm of wire should be bared 20 Problem Amplifier will not play Remote turn on light is off Solution 1 Check the DC voltage at the amplifier s B terminal with a voltmeter The vol2. 5 2 OWNER S MANUAL gt eckiord fosqate Dear Customer Congratulations on vour purchase of the world s finest brand of car audio amplifiers At Rockford Fosgate we are committed to musical reproduction at its best and we are pleased vou chose our product Through vears of engineer ing expertise hand craftsmanship and critical testing procedures we have created a wide range of products that reproduce music with all the clarity and richness you deserve For maximum performance we recommend you have your new Rockford Fosgate product installed by an Authorized Rockford Fosgate Dealer as we provide specialized training through Rockford Technical Training Institute RTTI Please read your warranty and retain your receipt and original carton for possible future use To add the finishing touch to your new Rockford Fosgate image order your Rockford accessories which include everything from T shirts and jackets to hats and sunglasses free brochure on Rockford Fosgate products and Rockford accessories please call 602 967 3565 or FAX 602 967 8132 In Canada call Korbon Trading at 905 567 1929 For International orders FAX 001 1 602 967 8132 or call 001 1 602 967 3565 PRACTICE SAFE SOUND CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100dB MAY CAUSE PERMANENT HEARING LOSS HIGH POWERED AUTOSOUND SYSTEM 5 PRODUCE SOUND PRESSURE LEVELS WELL OVER 130dB USE COMMO
3. experience by listening your Punch amplifier is GREAT AMPLIFIER 26 WARRANTY INFORMATION Rockford Fosgate warrants all electronics to the original consumer purchaser to be free from defects in materials or workmanship for a period of three 3 years We will cover parts and labor provided the product was purchased from an Authorized Rockford Fosgate Dealer This warranty does not apply to any product on which the seals and or serial number have been broken removed tampered with defaced or altered in any manner This warranty only applies to the original consumer purchaser and is not transferable Electronics found to be defective during the warranty period will be repaired or replaced at Rockford Fosgate s discretion Repaired or replaced electronics will be covered by the balance of the original warranty period only Rockford Fosgate shall not be responsible for any incidental or consequential damages resulting from a defect in electronics Some states do not allow the exclusion or limitation of incidental or consequential damages so the previous limitation may not be applicable The warranty does not cover any appearance item any cost or expense related tothe removalor reinstallation of the product any accessory usedin conjunction with the product damage to the product resulting from alteration accident misuse or abuse or improper installation This warranty does not apply if the parts or labor which would otherwise be pr
4. mcr uite di er REM e 16 Troubleshooting rre eraa nn 19 Dynamic Power Measurements 24 Warranty 27 L Installation C blage 28 Installation 30 La Instalac on Cableado 32 Installazione Elettriche 34 soa 6119 SHEM 007 611 002 SHOA 6119 SHEM 001 SHEM 091 SHEM Orc SHEM 008 SUOIJBDIJIDAAS eseu UO 10 19 xipueddy ees SHEM 002 SHEM 001 SHEM 0S SHEM 011 SHEM 002 SHEM SHEM 001 SHEM 09 SHEM 06 SSION Ol JBUBIS 610 1 0 uey 559 SHEM 08 ZH 000 02 01 02 peol B SWH UOMOJSIG 919 2610 uey 559 ZH 000 02 0102 Woy SHEM 07 oz sjeuueuo yoq 194 SWH UOMOJSIG 968070 uey 5501 YM ZH 000 02 01 OZ SHEM 02 peol 194 sn
5. Solution 1 Be sure the amplifier is properlv mounted Vou should be able to place vour hand a few inches above the amplifier housing and feel heat rising when the unit is on Be sure the amplifier is properly vented An ideal situation is to have the air flow through the heatsink fins Hot air rises so mount the heatsink by aligning the fins vertically This allows the air to flow freely carrying away the heat Check to see that the heatsink fins are free of any obstruction i e carpet seats etc Check to see that the impedance of the overall system is not less than 20 as described on page 14 Using an AC impedance meter Perfect Interface IM 1 sweep from 20 Hz 20 kHz and look for dips below the 2Q rating Be sure to test the bass region 20 Hz 150 Hz of your system If the amplifier is bridged to those speakers the load the amp sees is one half 1 2 of the reading on the AC impedance meter If the impedance level is below 20 check for bad speakers and or crossovers proper use of passive crossovers or try rewiring the entire system Problem Amplifier Noise Turn On Pop Solution 1 Disconnect the RCA plugs from the amplifier and recheck the amp by turning the unit on and off If turn pop goes away connect a delay turn on module Perfect Interface DT 1 to the amplifier See your Authorized Rockford Fosgate Dealer for more infor mation Disconnect the turn on wire from the
6. 9 6 M vo 8 9 6 INsaooc INSQ00L 115009 MSQOr HONNd lndul uonezienb3 od 95 4 ol jeuie1x3 Buisny ueg lndul uolholsld WI 1 4 4 Or 10024 Buidueq uipiwpueg PUNCH ACCESSORX PACK 12 365 76cm 17 Remote 518 16 Turn on Wire Red Power Wire 1 5 45 72cm Black Grounding Wire AG Remote Turn on Wire im ATO eme Power Ring 1 br as Terminals geo qiu cu Hex Head and Mounting Screws Connector Plug y Power Fuse Holder Power Fuse Holder with Fuse for Punch with fuse for Punch 200 40 60 and 100 Punch Owner s Punch Verification Manual Certificate INTRODUCTION Notes on Internal Circuitrv This manual provides information on the features instal lation and operation of the Punch Z channel Amplifiers We suggest vou save this manual for future reference We strongly recommend you have your Authorized Rock ford Fosgate Dealer and Service Center install the new Punch amplifier If you do choose to install the amplifier yourself please be sure to read the entire manual before beginning The Rockford Punch 40DSM 60DSM 100DSM and 200DSM automotive stereo power amplifiers provide state of the art sound in cars vans boats or whe
7. circuits protect the Punch amplifiers by multi plying output device voltage and current values to obtain approximate instantaneous device power This instanta neous power calculation is then processed through a time constant closely modeling the device heating time If the resulting modeled junction temperature exceeds a set threshold gate drive to the output devices is limited To get a better understanding of the Punch let s take a closer look CONTROLS AND FEATURES Punch Housing End Caps Mounting Screws This section describes the various controls and features of the Punch amplifiers Top View of Amplifier and End Caps The cast aluminum heatsink of the Punch is designed for high performance cooling The raised design of the hous ing allows cables and wires to run underneath the unit This provides for greater wiring flexibilitv and protects the cables from damage caused bv excessive heat and bend ing Interchangeable end caps conceal the wiring and input cables giving the amplifier a clean stealth look Also incorporated is a holding dimple built into the end cap This small feature enables the cap to be held in place while being mounted The end caps are secured to the housing with flush mounting captive screws Four 4 custom round hex screws included in the acces sory pack hold the unitin place These screws are covered when the end caps are installed Front View of Power Side REM LED B GND
8. head unit and use a different 12 volt power source to turn on the amplifier i e battery direct If the noise is gone use a relay to 22 switch from the clean power source Problem Engine Noise Whine Solution 1 Disconnect the speakers from the amplifier Connect a test speaker to the amplifier output terminals If the noise goes awav check vour speaker leads speakers and crossovers 2 Use a shorting plug to mute the input signal at the amplifier If the noise goes away a Bypass all of the other equipment i e crossovers and equalizers and connect the head unit directly to the amp If the noise disappears reconnect the equipment being sure to test for noise after each install Logic indicates that the last unit installed is the culprit Refer to the unit s owner s manual for more information Connect a new RCA line from the head unit to the amplifier If there is no noise replace the RCA cable Run the RCA cable on a different route Run anew RCA line from your head unit so there is only one grounding point If the noise disappears install the radio using only one 1 grounding point Isolate the radio chassis from the grounding on the dash and use an antenna grounding loop isolator on the antenna If noise persists see your Authorized Rockford Fosgate Dealer 23 DYNAMIC POWER MEASUREMENTS About the Dynamic Power Measurements The Audio Graph PowerCube is a test instrument used
9. means that a complex filter with anumber of parts will stop the unwanted frequencies faster than a simple filter The amount of reduction is measured in dB per octave The most common filters used in speaker crossovers as stated above are 6 dB per octave which uses one component per filter Placing this filter in series with the circuit will reduce power to the speaker by 6 dB every octave When passive crossover components are used in multiple speaker systems the crossover system s impedance must be considered along with the speaker s impedance when determining amplifier loading For 6 dB systems where a single filter highpass lowpass or bandpass is used in series the net impedance of the system will be increased and problems are unlikely For example if you are using a 4O speaker at 100Hz with a 6 dB filter the net impedance will be about 5 60 12 dB per octave systems where two filters are used in a series for each speaker can cause trouble A 12 dB choke capacitor pair forms a series resonant circuit to ground This impedance at resonance is determined by the speaker s dynamic independence For example if the speaker is open or disconnected the crossover input impedance can approach ZERO at resonance resulting in A DIRECT SHORT Since speaker impedance varies considerably from rated values at various frequencies it is common to find that standardized 12 dB per octave crossovers which are designed for pure resistor lo
10. Connector Indicator Connector REM The Punch is turned on bv connecting the blue remote Connector turn on wire to the source unit s Accessory or Auto Antenna lead either of which will go to 12 volts when the source unit is turned on LED Power The LED illuminates red when the unit is turned on Indicator B GND These connectors are used to supply power and ground Power to the amplifier and accept 12 AWG 8 AWG wires Connector Rockford Fosgate s Perfect Interface line of accessories in cludes high quality power and speaker wire gold plated RCA interconnecting cable and other products to complete your installation Ask your Authorized Rockford Fosgate Dealer about Perfect Interface Front View of Input Output Terminals Treble Left Input Right Input Bass Adjust Gain Control Gain Control Adjust Left Speaker RCA Input Right Speaker Speaker Output Terminals Treble Bass Input Gain Controls Input Connectors Output Connectors Output These gold plated terminal blocks connect the Right and Left channel outputs to the speakers and accept wire sizes from 8 gauge through 18 gauge Gold plated con nectors are immune to corrosion that can cause signal deterioration These controls adjust the amount of treble and bass response desired To increase the amount of response turn the dials clockwise to decrease turn the dials coun terclockwise These controls are factory preset to 500 millivolts to matc
11. ING THE PUNCH Caution Be sure to avoid running the power wires near the input cabling antenna power leads sensi tive equipment or harnesses The power wires carry substantial currents and can induce noise Preparing The following instructions explain how to prepare the Wires and wires for connecting the fuses and connectors We Fuses suggest you perform these procedures prior to wiring and mounting your new Punch amplifier Wiring the Fuse Holder 1 Cut approximately 18 45 72cm off the sed power wire Strip one end of the short piece of wire back 1 2 54cm as shown in the following diagram OC 1 00 2 54 2 Double back the piece of bared wire 1 2 1 27cm as shown below 3 Insertthe wire into one end of the fuse holder so that the insulation is just inside the crimp area as shown in the diagram Crimp the wire in place with the notched portion of a crimping tool Crimp Here PROTECTIVE FUSE HOLDER 11 Power 4 Cover the crimped area with the protective boot that is supplied with the fuse holder 5 Repeat the above steps to connect the remainder of the red power wire to the other side of the fuse holder and route to the amplifier mounting location Wiring the Power Connectors 1 Strip back approximatelv 3 8 95cm of wire L 3 8 l 95cm 2 Insertthe bared wire into the connector and crimp in place as shown in the
12. N SENSE AND PRACTICE SAFE SOUND The serial number can be found on the outside of the box Please record it in the space provided below as your permanent record This will become useful in recovering your amplifier if it is ever stolen and serve as verification of your factory warranty Serial Number Model Number TABLE OF CONTENTS 5 rectc toI du 1 Punch Accessory a a 3 Introd 4 Notes on Internal Circuitry sese 4 Controls and Features nanna 6 Top View of Amplifier and End Caps 6 Front View of Power 5 nn 7 Side View of Input Side nn 8 Installation Considerations pp 9 5 10 Battery and Charging pp 10 Mounting and 10 Trunk Mounting germ tree e 10 Passenger Compartment Mounting 11 Wiring the Puni i irre t e Ede git s 11 IE MEE 11 CI 11 Remote uet mcer Re Re teer eed 11 joue Um 12 Speakers tee a 12 Mono Configuration sessseseeeeneeeneennnnens 12 Passive Crossover Impedance 13 Table of Component Values 15 Wiring
13. ads have serious impedance dips near their crossover frequencies possibly causing overheating We recommend you use caution when using 12 dB per octave crossover systems unless they are specifically designed to have minimal impedance variations for the speakers in use 15 E PEE 6 dB Octave Low Pass 6 dB Octave High Pass UT Speaker Impedance eee 1000 800uF 600 400uF 300uF 200uF 136uF 100uF 78uF 66uF 44uF 20uF 14uF 9 5uF 6 6u F 6 dB Octave High and Low Pass Filters Table of Component Values L Low Pass Inductor C High Pass Capacitor For more information see vour Authorized Rockford Fosgate Dealer 16 SAMPLE WIRING DIAGRAMS BRIDGED WOOFERS L OUT TREBLE GAIN ri BASS 4OUT R se SOURCE UNIT 17 m U7 ISN WHO SOURCE UNIT OUT TREBLE GAN IN GAN BASS OUT
14. anks fuel lines brake or hydraulic lines vacuum lines or electrical wiring when working on any vehicle 5 For safety disconnect battery ground cable prior to connection of the amplifier 6 Neverrunwires underneath the vehicle The cleanest safest wiring connections are made by running the wire under the carpet or behind the side panels Never leave wires exposed 7 Avoidrunning wires over or through sharp edges Use grommets to protect wires routed through holes in metal 8 ALWAYS protect the battery and electrical system from shorts with proper fusing A fuse holder and fuse must be installed within 18 45 72cm of the battery terminal to safeguard from possible damage or injury 9 When grounding scrape paint off metal to ensure a good clean ground connection Grounding connec tions should be as short as possible and always be 9 Tools Needed connected to metal that is welded to the main bodv or chassis of the vehicle The following is a list of tools vou will need for installing the Punch amplifier Allen Wrenches 7 64 8 3 32 Wire Strippers Batterv Post Wrench Electric Hand Drill with assorted bits Voltmeter Wire Crimpers i e Perfect Interface RT KT1 BATTERV AND CHARGING Punch amplifiers will naturallv put an extra load on vour batterv and charging recommend vou check vour alternator capacitv to insure ample charging capa bilitv to handle the additional load of v
15. c For more information refer to the wiring diagrams begin ning on page 17 Caution Punch amplifiers are not recommended for impedance loads below 2Q stereo or 4 bridged Be sure to observe proper speaker terminal polarity throughout the system It is critical for the Punch to use the correct negative terminals for right and left channels since the RIGHT NEGATIVE terminal is the hot terminal for the right speaker DO NOT chassis ground any of the speaker leads as unstable operation may result When wiring speakers to the amplifiers we recommend using fuses for speaker protection See your Authorized Rockford Fosgate Dealer for more information A passive crossover is a circuit that employs capacitors and or coils and is placed on speaker leads between the amplifier and speaker to delegate frequencies in the speaker s optimum performance range The most commonly used filter networks are 6 dB per octave systems These are easy to construct and require a minimum number of parts A filter network can perform one of three functions These are highpass capacitors lowpass inductors chokes or coils and bandpass com bination of a capacitor and a coil This result limiting the types of frequency to the speaker is directly dependent upon the speaker s impedance and component values 14 High and low pass filter sections have cutoff rate that increases as the number of components in the filter increases This
16. fferent turn on methods If the source unit has no Auto Antenna lead or if the Auto Antenna goes down during tape operation a Find the internal switched power voltage inside the source unit and solder a lead to it Run the lead out through the back of the unit being sure to use a grommet for insulation from the case and connect the Punch remote turn on wire or b Install a switch in the car with one terminal connected to 12 volts and the other to the Punch lead The amplifier s signal input RCA jacks should be nected to the source unit s signal outputs with high quality braided or double shielded interconnecting RCA cables Note Be sure to route the Punch signal input cable away from the main power wire and the car s wiring harnesses to avoid noise coupling Punch amplifiers are rated for safe operation into loads of 2Q or greater in stereo mode or 4Q in bridged mono configurations The primary loads on any amplifier come from directly connected speakers without using capaci tors The measured resistance for each side should not be less than 2Q 13 Configura tion Passive Crossover Impedance The Punch amplifiers are capable of bridged mono configurations This configuration enables vou to Runa single woofer a stereo system Run bridged amplifiers as a high power stereo svstem Run one amplifier with a bridged mono woofer and another as a high frequency stereo amp et
17. following diagram Crimp Here Wire w insulation winsulatio 5 The gold B terminal must be connected o rec yto the positive terminal of the battery with an appropriate size fuse See the Specifications Table for more infor mation This provides a power source with a low voltage drop and low noise Be sure to use the supplied fuse and fuse holder within 18 45 72cm of the battery s positive terminal Failureto do so may cause damage to the vehicle and the amplifier Ifthe power wire mustbe extended beyond 17 518 16cm we recommend you use 8 gauge or heavier stranded wire 12 Ground Remote Turn on Input Speakers The GND terminal grounds the amplifier and 15 connected to the chassis of the vehicle with 12 gauge or heavier stranded wire To prevent ground loops we recommend you refrain from extending the ground wire beyond 18 45 72cm in any installation The ends of the Power and Ground wires that are connected to the amplifier should be stripped back 5 8 1 59cm The Punch amplifiers are turned on by supplying positive 12 volts to the REM terminal Usually the terminal is connected to the source unit s Accessory or Auto Antenna lead either of which will go to 12 Volts when the source unit is turned on Although the majority of high quality automotive source units have an Accessory or Antenna output there are many which require di
18. h most head units and are variable from 250 millivolts to one volt More than likely they will not need adjusting If just a little volume from the source unit drives the amplifier into distortion reduce the input gain controls so that the distortion doesn t start until the source volume is at about 3 4 of its rotation The amplifier s signal input female RCA jacks should be connected to the source unit s signal outputs with high quality RCA cables The connectors have been plated in gold to eliminate the possibility of corrosion that can cause signal deterioration INSTALLATION CONSIDERATIONS This section focuses on some of the vehicle consider ations for installing vour new Punch amplifier Checking your battery and current sound system as well as pre planning your system layout and best wiring routes will save installation time When deciding how to lay out your new system be sure that each component will be easily accessible for making adjustments Before beginning any installation be sure to follow these simple rules 1 Carefully read and understand the instructions before attempting to install the amplifier 2 For easier assembly we suggest you run all wires prior to mounting your amplifier in place 3 Use only quality connectors for making connections See your Authorized Rockford Fosgate Dealer for Perfect Interface wire enhancements 4 Think before you drill Be careful not to cut or drill into gas t
19. n Number Rockford Fosgate A Division of Rockford Corporation 546 South Rockford Drive Tempe Arizona 85281 U S A In U S A 602 967 3565 In Canada call Korbon 905 567 1929 In Europe Fax 49 4207 801250 REV B 11 93 MAN 0051
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21. our new Punch equipment Stock electrical svstems in good condition should typically handle the extra load of individual Punch unit without problems although batterv and alter nator life be slightly reduced If problems arise we suggest you use a heavy duty battery and a high output alternator MOUNTING AND LOCATION Trunk Mounting The mounting location and position of the Punch will have a great effect on its ability to dissipate the heat generatedin normal operation The Punch has a heatsink designed for heat dissipation and internal shutoff cir cuitry to avoid overheating so it is reasonably tolerant of mounting variations However care should be taken to ensure adequate ventilation The temperature inside a trunk can reach as high as 175 F 80 C during the summer months Since the thermal shutoff point for the Punch is 195 F 90 C itis easy to see that the amp must be mounted for maximum cooling capability Mounting the amplifier on the floor of the trunk prevents sufficient convectional air flow cooling Mount ing the unit vertically on a surface with the fin grooves running up and down usually results in the best cooling 10 Passenger Under the seat or floor mounting will work as long as there Compart aminimum of 1 2 5cm of air gap above the amplifer s ment heatsink Mountin 0 9 Vertical mounting is still the best and under dash mount ing is satisfactorv as well WIR
22. ovided without charge under this warranty are obtained from any other source than Rockford Fosgate or an Authorized Rockford Fosgate Service Center This warranty is the only express warranty and does not create any implied warranties Rockford Fosgate limits its obligations under any implied warranties under state laws to a period not to exceed the written warranty period Some states do not allow limitation on how long an implied warranty lasts so the above limitation may not apply This warranty applies only to products sold in the United States of America or its possessions For warranty outside the U S A please contact the nearest Authorized Rockford Fosgate Dealer This warranty gives the consumer specific legal rights and the consumer may have other rights which vary from state to state A defective product must be shipped prepaid to the Authorized Rockford Fosgate Dealer from which the consumer purchased the product or to the Rockford Fosgate factory in Tempe Arizona in the original factory carton or equivalent Any shipping loss or damage will be borne by the consumer or the consumer s shipper A consumer returning a product to the factory should call 800 669 9899 for a Return Authorization Number All shipments shall be clearly marked with the Return Authorization Number on the outside of the shipping carton Ship to Rockford Corporation Warranty Repair Department 2055 E 5th Street Tempe AZ 85281 U S A Return Authorizatio
23. r s im pedance is dynamic It is constantly changing in value dependent upon the frequency of the input signal There fore measuring power with the amplifier loaded into a 4 ohm resistor is not the same as measuring power with the amplifier connected to a 4 ohm speaker Most people do not listen to music through a resistor Appendix A 24 A4ohm speaker may experience a drop in impedance 4 6 times lower than its nominal printed impedance A speaker will also create phase shifts in the signal that is passed through it These phase shifts happen because a speaker is an inductor voice coil and a capacitor compliance of the surround spider as well as a resistor voice coil wire To simulate a speaker the Audio Graph PowerCube measures output power into 20 different loads It tests at 8 ohms 4 ohms 2 ohms and 1 ohm Each of these impedances is also tested at 60 309 09 4309 and 4609 phase angles These different impedances and phase angles represent the shifts in impedance and phase that can occur in a tvpical loudspeaker Information Cubed The data acquired in the testing procedure is then graphed in the form of a 3 dimensional cube Hence the name PowerCube The Phase Ang eis expressed the horizontal axis the Output Voltage is presented on the vertical axis and the mpoedance is displayed on the Z axis Output Power in watts is listed on the left hand side for each impedance at each phase angle Audio G
24. raph The PowerCube VOLTAGE FROM x2 STEREO BATTERY MONO BRIDGED MONO MODEL BEING TESTED MANUFACTURERS RATED OUTPUT Amplifier PUNCH 200 14 4V x 2 Rated Power 75W at 4 Ohms Serial No Owner ROCKFORD CORPORATION 801 609 84 OUTPUT VOLTAGE 2 W AT THE RAILS MOSFETS 84 W IN 85 W 159 W 2 154 W 153 W 2 154 W 158 266 251 W 245 W 248 W 261 W 378 343 W 60 333 W PHASE ANGLES o MOTION OF 5 SPEAKER Bridged Mono test amplifier sees 1 2 impedance 20 test amp sees 10 ul 2 lt 25 What is an Amplifier An amplifier bv definition is a voltage generating device recreating the signal which is input to it identically but with increased volume It will be connected to a reactive load the speaker The impedance of this load and phase of the signal passing through the load will vary dependent upon the frequency of the input signal music Therefore a perfect amplifier will be able to maintain the same output voltage regardless of load characteristics and will not alter the signal it is reproducing A perfect amplifier when measured by the AudioGraph PowerCube would present data that forms a perfect cube Unfortu nately amplifiers are not perfect The laws of physics generally prevent it A great amplifier is about the best one can hope to attain As you can see by the PowerCube and as you will
25. rever a high current 12 volt power source is available Discrete Surface Mount DSM technology is utilized in the crafting of all our Punch amplifiers This process provides greater ruggedness and consistency of both components and layout Already used heavily in aero space industrial and automotive applications this tech nology is also highly advantageous in the hostile automo tive environment The Punch adjustable input circuits are designed to match almost any music source The amplifiers will drive most normal speaker types Internal circuitry in the Punch amplifier prevents damage due to speaker terminal shorts The Punch incorporates internal battery line filtering and extensive noise preven tion circuitry The Punch Equalization circuit is best utilized and de signed to compensate for the acoustic inadequacies of the automotive environment This patented circuitry will correct for the poor bass response and natural high frequency roll off inherent in the world of automotive stereo The resultis full range sound without the unpleas ant changes in the mid range sound produced by most tone control and equalizer circuits High powered audio amplifiers must alwavs address the problem of power device reliabilitv In particular load fault conditions can easily destroy an amplifier that is not carefully designed Rockford Fosgate has answered this problem with the development of Real Time Power Pro tection RTPP The RTPP
26. tage should measure be tween 11 5V 15 5V If voltage is not found check the battery fuse fuse housing and wire connections Fix repair or replace accordingly Check the voltage at the amplifier s remote turn on lead The voltage should measure between 11V 15V a If voltage is above or below the prescribed mea surements have the head unit checked by an Authorized Dealer or Service Center b If the remote turn on current draw from the head unitis connected to multiple amps and or electron ics the current draw may be too great Check for proper connections Use a relay to suppress the excessive current draw If you are still having problems have the amplifier checked out by an Authorized Rockford Fosgate Dealer Problem Amplifier will not play Remote turn on light is on Solution 1 Unplug the head unit and test the amplifier with an other working source unit i e bench test radio walkman etc If the amplifier plays check the in dash leads for cuts breaks and or shorts Disconnect the existing speakers and connect a set of test speakers to the output of the amplifier any type of speaker will do i e simple home box type bookshelf raw speaker etc If the amp plays check for shorts or blown voice coils in the vehicle s speaker system If you are still having problems have the amplifier checked out by an Authorized Rockford Fosgate Dealer 21 Problem Amplifier gets too hot
27. to measure the output of an amplifier in accordance with IHF 202 industry standards The IHF 202 standard is a Dynamic power measurement and was developed as a means of measuring power in a manner that best repre sents the Real World operation of an amplifier Many manufacturers including Rockford Fosgate at times will measure amplifier power into a fixed resistor 4 ohm 2 ohm While this method is useful in some types of evaluation and testing it is not representative of an amplifier that is connected up to a speaker and playing music Music Music is dynamic the sound waves are complex and constantly changing In order to simulate this the IHF 202 standard calls for the input signal to the amplifier to be a 1kHz bursted tone This signal is input on for a short period of time and then off for a rested period The signal is gradually increased in level until the amplifier s output exceeds 1 Total Harmonic Distortion THD At 1 distortion becomes audible therefore any power pro duced above that level is considered vsab e Many manufacturers represent their amplifiers output power in excess of 10 distortion They use many names for this measurement such as Total Maximum Power or Maxi mum Output Power This is not indicative of the aciva usable outout power Listening to Loudspeakers Not Resistors A loudspeaker is not a resistor resistor s value resis tance measured in ohms is fixed A loudspeake
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