Soundstream Technologies 414s Stereo Amplifier User Manual
Contents
1. 20 1 SATELLITE SPEAKERS SATELLITE SPEAKERS AMPLIFIER Hea d as ES x a EM gt SUBWOOFERS CHANNELS 1 amp 2 CHANNELS 3 amp 4 TERNAL INPUT 7 EXTERNAL INPUT 12 High Poss Alter FROM CH ee LOW PASS AGH FILL RANGE 1 amp 2 ou 811 ims 24 AOC Low Pass Fiber LOW PASS HIGH PASS FULL RANGE MIXED MONO STEREO SOGE 7 I 21 MIXED MONO 5 ER RIDGE E o o o SAMPLE SYSTEM 4 SAMPLE SYSTEM 3 Reference414s and Reference644s 2 channels of RCA input 4 stereo channels of high pass output RCA iine output set to low pass Line output to an external amplifier driving subwoofers Reference414s and Reference644s 4 channels of RCA input 2 stereo channels of high pass output 1 bridged channel of low pass output NOTE 644s only Due to the internal summing circuitry of the amplifier s low pass filter fading to the satellites will never completely defeat the subwoofers CN n i ems gt See FE 1 2 SATELLITE SPEAKERS LOW PASS HIGH PASS MIXED MONO STEREO SATELLITE SPEAKERS2. SUBWOOFER SUBWOOFER AMPLIFIER ESS Head Unit BILL SATELLITE SPEAKERS CHANNELS 1 amp 2 2 1 LOW PASS HIGH PASS FULL RANGE E STEREO BRIDGE MIXED MONO 12 High Poss Filer 24 Oct Low Poss Filler CHANNELS 3 amp 4 EXTERNAL INPUT INTERNAL INPUT FROM CH 182 LOW PASS HIGH PASS FULL RANGE CD MIXED STEREO BRIDGE 24 go SATELLITE SPEAKER SATELLITE SPEAKER AMPLIFIER Head Unit SUBWOOFERS CHANNELS 1 amp 2 LOW PASS HIGH PASS FULL RANGE MEXED BRIDGE 12 High Poss Finer E 24 Low Poss Fher 25 TROUBLESHOOTING PROBLEM No sound and power LED is not lit No sound power LED is lit and the AJRBASS option has not been added Fault LED is lit Repeatedly blown amp fuse frequent activation of Smart Power Supply Circuit Channels 1 2 3 or 4 experiencing intermittent output Reference414s only Unable to adjust the subwoofer amp midrange level separately Reference414s only No output from channels 3 amp 4 with 1 pair of RCA inputs Reference414s only Not enough input sensitivity while using the Balanced input Reference644s only Left and Right Input Overload indicators lighting Reference644s only Alternator whine while using Unbalanced RCA
3. L INPUTS O LEVEL 60 2405v OF v Hr tn KOVER N BSS C 27 im OOC 14 4l S e LeINZUTAR A RIGH LEVE 12 CHANNELS 1 2 HE ILP 11 XOVER Le 30 120 60 240 5 0 2 SY Oy n 10 DO L OUTPUT R E 7 0000 309 C Handcratied la the US CMD REMOTE 12v FRONT VIEW TO O 21 24 Low Po Hite CHANNELS 1 amp 2 CHANNELS 3 amp 4 EXTERNAL MIXED MONO LOW Pas H INTERNAL INPUT FROM CH 147 hy AKED MOND E HIGH PASS STEREO 7 8 FULL RANGE 4 ROSE LOW Fass BOTTOM VIEW PARTIAL El HIGH PASS g Le range E N gt o TF MAIN FUSES Pa m 11 12 13 14 15 16 18 18 20 21 22 23 Fault LED Indicates a blown fuse High Power LED Indicates amplifier power on in High Power mode Auto High Current LED Indicates amplifier power on in High Current mode Line Out Crossover Switch Select high pass low pass or full range low level output to an auxiliary amplifier 12V Connected to a fuse or circuit breaker then to the battery s positive post GND Main ground connection Bolt to a clean chass
4. 9 High Power Auto High Current Power Supply Design 10 Selecting Input Modes sta aa 11 Balanced Unbalanced Input Reference644s 12 Wiring amp Wiring Diagram 13 14 Installation and Mounting es 15 Level Setting Reference4 14s 16 Level Setting Reference644s 17 Crossover Adjustment ea 18 AIRBASSIM rccte etat atat o tea te Conn conata 19 Sample Systems seen 20 25 TING 26 eio ee oS e 26 Protection Circuitry cora ecc as Me rene re ga cae re ra 27 Specifications a a incssacadananaaaaeaasaaaacas 27 3 DESIGN FEATURES e Uncompromising Design and Construction including mil spec glass epoxy circuit boards and high current custom gold plated solid brass connections that will accept up to 4 gauge power ground wire e Auto High Current Soundstream s exclusive circuit which automatically customizes your amplifier to its particular application High Current low impedance loads multiple subwoofers less than 2 ohms mono or High Power higher impedance loads 2 ohms mono and up e Coherent Stereo Mixed Mono selection for either pure stereo operation or mixed mono for simultaneous stereo and mono Chassisink Darlington Power Array Soundstream s
5. AMPLIFIER pe Head Unit fe FS CHANNELS 1 amp FULL RANGE Em BRIDGE SUBWOOFERS CHANNELS 3 8 4 INTERNAL PUT EXTERNAL INPUT CH Xi 142 Cur LOWPASS MIGHPASS FULL RANGE 12 dB Oct High Poss Filter 24 di Ocl Low Poss Fitter DEI in MIXED MONO STEREO 22 SUBWOOFERS USE CHANNELS 1 amp 2 FOR iS p de SATELLITE SPEAKERS Head Unit LOW PASS amp CHANNELS 3 amp 4 FOR HIGH PASS ON THE REFERENCE414S ONLY CHANNELS 1 amp 2 TE LOW PASS HIGH PASS FULL RANGE EB MIXED MONO STEREO BRIDGE 12 diVOc High Poss Aher NJ 24 SWOCI Low Pass Filter 23 CHANNELS 3 amp 4 INTERNAL INPUT eena eur FROM CH 1 amp 2 dj LOW PASS HIGH PASS FULL RANGE E do MED MONO STEREO SAMPLE SYSTEM 5 Reference414s and Reference644s 2 channels of RCA input 2 bridged channels of low pass output RCA line output set to high pass Line output to an external amplifier driving satellite speakers SAMPLE SYSTEM 6 Reference414s and Reference644s 2 channels of RCA input 2 bridged channels of high pass output RCA line output set to low pass Line output to an external amplifier driving subwoofers Aw GD Paracrafied n he USA
6. Mixed Mono Bridged Mono and crossover switches on the bottom of the amplifier to the appropriate positions before bolting down the amplifier see pages 20 25 Be sure to replace the hole plugs 3 MOUNTING THE AMPLIFIER a Using the amplifier as a template mark the mounting surface b Remove the amplifier and drill the holes c Mount the amplifier to the surface using the provided hardware 4 WIRING a Run and connect the audio signal and remote turn on cables to the amplifier from the source unit b Carefully run the positive cable from the amplifier to a fuse or circuit breaker within 18 of the battery c Connect the fuse or circuit breaker to the battery Leave the circuit breaker off or the fuse out until everything is bolted down d Secure the ground cable to a solid chassis ground on the vehicle It may be necessary to sand paint down to raw metal for a good connection e Double check each and every connection g Re connect the fuse or circuit breaker NOTE There may be a sizable spark when connecting the power and ground load to the amplifier for the first time Please see the comment on page f1 for informatio about connecting power and ground wires to your amplifier 5 POWER UP Power up the system and look at the red High Power LED there may be a 2 3 second delay from the time the the source unit is turned on to the time that the LED on the amp turns on which is normal Once the amplifier power L
7. plifier channels 1 4 and crossover outputs 19 Ot 20 High Pass Crossover Adjustment Pot Crossover frequency setting for the high pass filter for 184 358 channels 1 amp 2 and crossover outputs 2 21 Input Level Channels 1 amp 2 Independent left and right channel input ievel controls T6 o 22 Balanced Signal Input Connector Channels 1 amp 2 6 pin balanced signal input connector for OX use with the Soundstream BLT or BLT4 Balanced Line Transmitters Inputs Channels 1 amp 2 right and left RCA Unbalanced inputs 23 A ON 24 Speaker Output Connections Channels 3 amp 4 speaker connection terminal E 25 High Pass Crossover Adjustment Pot Crossover frequency setting for the high pass filter for et ur channels 3 amp 4 Input Level Channels 3 amp 4 Independent left and right channel input level controls 26 so 27 Balanced Signal Input Connector Channels 3 amp 4 6 pin Balanced signal input connector for use with the Soundstream BLT or BLT4 Balanced Line Transmitter Inputs Channels 3 amp 4 right and left RCA Unbalanced inputs 28 Main Fuse Main power supply fuses Replace onty with the same value fuses 29 Amplifier Crossover Channels 1 amp 2 Select high pass low pass or full range operation 30 TN 31 Coherent Stereo Bridge Mixed Mono switch Channels 1 amp 2 Input mode selector a 32
8. 16 5 W x 2 25 H x 9 8 D 27 Dimensions SERIES AND PARALLEL WIRING 1 M Aus aha ta pi A A e 4Onms 7 40 2 4 ohm drivers in parallel 2 ohms um Aper Beer A Ohm mw Z 2 4 ohm drivers in series 8 ohms Amplifier Sumo PE UN uu pa ER ee 4 Ohm 4 4 drivers in pa 1 ohm SOUNDSTREAM TECHNOLOGIES 120 Blue Ravine Road Folsom California 95630 ph 916 351 1288 fax 916 351 0414
9. These indicators will notify you if you are clipping the PREAMPLIFIER stage of the amplifier If the amplifiers output is distorted and the clipping lights are not blinking you are most likely clipping the OUTPUTS of the amplifier or driving the speaker to distortion There is an additional control for subwoofer level adjustment on the Reference644s The purpose of this control is to provide additional range of adjustment for the subwoofer signal in relation to the high pass signal This control adjusts the level of any channels or RCA signal outputs in low pass mode 17 INSTALLATION STEP 6 R VER ADJUSTMENT The REFERENCE644s and REFERENCE414s amplifiers incorporate an on board staggered electronic crossover They also have RCA outputs to drive an external amplifier No external electronic crossover is necessary The high and low pass portions of the crossover can be set independently of one another In most car audio installations there is a tendency for a midbass boom Because of their interior dimensions most cars will resonate or ring at these midbass frequencies If we design the system so there is less musical information in this region the final response is very smooth and natural sounding The high pass filter is variable from 60 to 240 Hz at 12 dB octave while the low pass filter is variable from 30 to 120 Hz at 24 dB octave For initial crossover setup try setting the low pass filter to approximately 60 Hz and
10. overbuilding of the output section incorporates multiple output transistors instead of a few for faster stronger power delivery The transistors are sandwiched between the circuit board and the heatsink in a design called Chassisink to ensure cool efficient amplifier operation PowerGrid Power Supply Design All power supply components are located near one another connected by thick wide PCB traces which ensures rapid high current delivery The entire power supply is isolated on one side of the circuit board while the audio stage is located opposite it guaranteeing minimal noise Ultra Low ESR Capacitance Bank Multiple small input power capacitors are used to provide lower ESR Equivalent Series Resistance which means more power in and out faster Smart Thermal Rollback Most amplifiers shut off when they get too hot In the unlikely event the REFERENCE amplifier reaches 85 C it will gradually roll back its average power without affecting the dynamics Once the amplifier has cooled off it returns to full power output If overheating should continue a second thermal sensing protection circuit will shut off the amplifier if the heatsink reaches 95 C Fault Monitor LED on the top panel notifies you of blown power supply fuses 1 2 ohm Drive Ability Reference644s only The REFERENCE6445 amplifier is designed to drive virtually any load all the way down to 1 2 ohm stereo 1 ohm mono 1 ohm Drive A
11. Auto High Current power supply e Circuit Breaker on each channel Reference414s only e Smart Power Supply Thermal Rollback activating at 85 C e A fail safe thermal protection circuit activating at 95 C Your amplifier also incorporates an innovative Fault Diagnosis System that identifies a blown power supply fuse NOTE f you experience blown main power supply fuses it is likely that the amplifier is seeing a dead short either in the speaker wire or in the speaker itself Rectify the problem before blowing mu tip e fuses DO NOT increase values beyond the original fuse value Doing so will void your warranty and may damage your amplifier SPECIFICATIONS POWER 4 Q Stereo 2 Q Stereo 1 Stereo 1129 Stereo Watts 8 Bridged 4 Bridged 2 Bridged 1 Bridged at 12 VDC Reference41 4s 50 x 4 75 x4 100x4 NA 100 x 2 150 x 2 200 x 2 Reference644s 75 x4 150x4 160x4 160x4 150 x 2 300 x 2 320 x 2 320 x 2 THD lt 0 1 Signal to Noise gt 100 dB Frequency Response 20 Hz to 20 kHz 0 5 dB Stereo Separation gt 90 dB Damping gt 200 Input Sensitivity Ref414s 200mV 5 0V Ref414s Ref644s 200mV 2 0V or 500mV to 5 0V Ref644s Input Impedance 1 OK ohms Crossover Output 340 mV output w 200 mV input 4 5 dB Crossover Specifications Low Pass 30 120 Hz at 24 dB octave High Pass 60 240 Hz at 12 dB octave Ref414s 15 25 W x 2 25 H x 9 8 D Ref644s
12. Channels 3 amp 4 Indicates the signal input level or input gain level is too high 21 10 AO 10 Input Level Selector Switch Channels 3 amp 4 Selectable input sensitivity range from 0 2 2 Volts RMS or from 0 5 5 Volts RMS O 11 Left Channel Balanced Unbalanced Input Selector Switch Channel 3 Select Balanced to 1 ij E use the 6 pin balanced signal input Select Unbalanced to use the RCA signal inputs fi 23 5 O 12 Right Channel Balanced Unbalanced Input Selector Switch Channel 4 Select Balanced 3 to use the 6 pin batanced signal input Select Unbalanced to use the RCA signal inputs i E i 13 12 Connected to a fuse or circuit breaker then to the battery s positive post zi 22 14 GND Main ground connectian Bolt to a clean chassis ground in the vehicle Qi 15 REM Remote turn on input from the head unit Accepts 12V 3 i Lar 16 Speaker Output Connections Channels 1 amp 2 speaker connection terminal TROSE 17 Crossover Output High pass low pass or full range output to an auxiliary amplifier 21 5 j P 18 Subwoofer Level Control Additional tevel control to any channel or line output receiving infor Dat 2 mation from the internal low pass filter 7 207 Ok E I 19 Low Pass Crossover Adjustment Pot Crossover frequency setting for the low pass filter Am A ENE
13. Channels 3 amp 4 Input Select Selectabie inputs from internal from channels 1 amp 2 or external 157 J E from channels 3 amp 4 locat balanced ar unbalanced inputs 1448 rN 1 33 Amplifier Crossover Channels 3 amp 4 Select high pass low pass or fuil range operation 4i wp i 34 Coherent Stereo Bridge Mixed Mono switch Channels 3 amp 4 input mode selector 13 FRONT VIEW BOTTOM VIEW PARTIAL AUTO HIGH CURRENT POWER SUPPLY The REFERENCE amplifier employs an extremely efficient Auto High Current power supply patent pending This power supply circuitry automatically customizes your amplifier for optimum efficiency and power output into virtually any impedance load When other brand amplifiers are driven at low impedances i e 1 ohm orless they shut down squash dynamics and power output called current limiting or waste huge amounts of power i e low efficiency All of which reduce the real world power the amplifier can produce in the car Soundstream s Auto High Current power supply allows the REFERENCE amplifiers to be one of two types of amps either producing maximum power at higher impedances perfect for satellites or at lower impedances usually with multiple subwoofers This is done by letting the amplifiers power supply continuously monitor the impedance of the load the amplifier is driving If the impedance drops too low the power supply wil
14. ED is on and the source unit is playing you should have sound coming from the speakers 15 INSTALLATION STEP 5 jm LEVEL SETTING The input levels are adjusted by means of the individual channel input level controls located on the front of the amplifier This is a unique dual stage circuit that adjusts both level and gain This topology maintains better Signal to Noise ratios even when using sources with minimal output In the ideal situation all components in the audio system reach maximum undistorted output at the same time The reason is because an amplifier will only make what comes into it bigger So if you send it a distorted signal from the head unit the amplifier is going to amplify distorted information The same thing holds true if an outboard processor or crossover begins to distort before you have maximum output from the amplifier By setting all components to reach clipping at the same time you can maximize the output of your system For the REFERENCE amplifiers follow the steps below for the quickest easiest means of setting the levels Level Setting the Reference414s 1 Turn the amp s input levels to minimum position fully counter clockwise 2 Set source unit volume to approximately 3 4 of full volume 3 While playing dynamic source material slowly increase the amplifier s input level until a near maximum undistorted level is heard in the system 4 Continue to adjust the gains independently in order to
15. REFERENCE 414s 644s 4 3 2 Channel Power Amplifiers OWNER S MANUAL AND INSTALLATION GUIDE SOUNDS REAM T E H N L O G I E S CONGRATULATIONS Younowown a REFERENCE Amplifier the product of an uncompromising design and engineering philosophy Your Soundstream REFERENCE amplifier will outperform any other amplifier in the world To maximize the performance of your system we recommend that you thoroughly acquaint yourself with its capabilities and features Please retain this manual and your sales and installation receipts for future reference Soundstream amplifiers are the result of American craftsmanship and the highest quality control standards and when properly installed will provide you with many years of listening pleasure Should your amplifier ever need service or replacement due to theft please record the following information which will help protect your investment Model and Serial Dealers Name Date of Purchase Installation Shop Installation Date CAUTION Prolonged listening at high levels may result in hearing loss Even though your new Soundstream REFERENCE amplifier sounds better than anything you ve ever heard exercise caution to prevent hearing damage TABLE OF CONTENTS Design Features 4 5 Reference41 4s Diagram 6 7 Reference644s 8
16. Signal Left Signal Right Signal MEN Shield NOTE The pin configuration shown in the diagram is the view looking into th balanced input jack 12 INSTALLATION STEP 3 WIRING POWER AND GROUND To ensure maximum output from your REFERENCE amplifiers use high quality low loss power and ground cables The REFERENCE amplifiers will accept up to 4 gauge power and ground cables Determine from the chart below the minimum gauge power and ground wire for your application up to 10 upto 20 REFERENCE414s Soundstream Power40 or Soundstream 40 80 4 4 or 8 ga REFERENCE644s Soundstream Power40 or Soundstream Power40 only Power80 4 ga 4 or 8 ga Read this or sparks will f y The Soundstream REFERENCE amplifiers have extensive internal power supply capacitance called the Ultra Low ESR Capacitance Bank Multiple small input power capacitors act as an internal stiffening capacitor Because of the large amount of internal capacitance there may be a sizable spark when connecting the power and ground lead to the amplifier for the first time In order to charge he capacitor bank without a spark we suggest you do the following 1 Connect the 12 volt cable to the amplifier and to the battery 2 Connect one end of the ground cable to the chassis of the vehicle 3 We have supplied a 150 ohm 2 watt resistor with the amplifier One leg of the resistor has been connected to the g
17. adjust the desired balance between satellite speakers and subwoofers NOTE Even though the S N ratio with low output sources is better with the REFERENCE414s amplifier than others your best combination of output level and Signal to Noise ratio will be achieved when the input levels are set between 1 0 Vand 5 0 V 16 Level Setting the Reference644s 1 Turn the input levels to minimum position fully counter dockwise If any channel is in low pass mode set the subwoofer level pot to the 0 dB position 12 o clock 2 Begin with the input level switches in the 0 5 5 0 Volt position 3 Set source unit volume to approximately 3 4 of full volume 4 While playing dynamic source material slowly increase the amplifier s input levels until a near maximum undistorted level is heard in the system 5 If you can t get enough gain out of the amplifier set the input level switch to the 0 2 2 0 Volt position and repeat steps 3 and 4 6 If any channel is in low pass mode you may have to adjust the subwoofer level control pot to achieve a good balance between satellites and subwoofers NOTE It may be necessary to adjust the balance between low and high pass levels after listening to the system These seitings are dependent upon personal preference If your preamplifier source unit has an extremely high output level be sure to pay attention to the clipping indicators located on the top of the amplifier
18. bility Reference414s only The REFERENCE414s amplifier is designed to drive virtually any load all the way down to 1 ohm stereo 2 ohm mono Dual Discrete Class A Drive Stages Over 12 times the drive current of most amplifiers which maintains performance into low impedance loads Drive Delay Muted Turn on off Circuit A unique circuit which completely eliminates any amplifier related turn on off noises Flexible Dual Input Level Sensitivity Reference644s only accepts 2 voltage ranges from 200 mV to 2 0 V and from 500 mV to 5 0 V permitting maximum output from the amplifier with virtually any source unit The Reference414s has a single input range varying from 200 mV to 5 0 V Differential Balanced Input Design for added immunity to noise caused by component and vehicle electrical system interaction when using unbalanced RCA inputs True Balanced Input Reference644s only for professional quality performance and noise cancellation The 6 pin DIN plug carries and signal information for left and right channels audio ground and 15 Vdc to operate the Soundstream BLT or BLT4 Balanced Line Transmitters AARBASS Upgradable This feature allows RF remote control level adjustment while the low pass filter on the amplifiers internal crossover is being used e Reference414s p TOP VIEW PARTIAL
19. eam s DL 1and 81 1 ideal when using the Unbalanced RCA inputs While using the Balanced DIN input on the Reference644s use the cable supplied with the BLT or BLT4 SPEAKER CABLE The REFERENCE amps will accept up to 8 gauge speaker cable Use a high quality flexible multi strand cable for best performance and longevity Soundstream Speaker120 amp 160 12 and 16 gauge are ideal SATELLITE SPEAKERS SATELLITE SPEAKERS A 0 24 Batlery Termina 14 INSTALLATION STEP 4 INSTALLATION AND MOUNTIN 1 AMPLIFIER LOCA TION The REFERENCE amplifiers employ highly efficient circuitry and a unique Chassisink design to maintain lower operating temperatures Additional cooling may be required if the amplifier is located in a tightly confined area or when driving especially low impedance loads at extremely high levels When mounting the amplifier it should be securely mounted to either a panel in the vehicle or an amp board or rack that is securely mounted to the vehicle The mounting location should be either in the passenger compartment or in the trunk of the vehicle away from moisture stray or moving objects and major electrical components Toprovide adequate ventilation mount the amplifier so that there are at least two inches of freely circulating air above and to the sides of it SWITCHES Set the Coherent Stereo
20. h Balanced and Unbalanced inputs The input range switch position and level settings are dependent upon the preamplifier source unit output signal level For the best System Signal to Noise Ratio we recommend that the input level controls be set as far down as possible rotated counter clockwise while maintaining an acceptable level of output Using the Unbalanced RCA input When using the Unbalanced RCA input the RIGHT channel channel 2 input signal switch MUST be in the UNBAL position Also when first installing the amplifier using this input configuration we suggest that the remaining input signal switches be in the UNBAL position as well If you experience Iternator whin r other installation noi with h switch in th UNBAL position try moving channels 1 3 amp 4 inputsianal switches to thposition This should remove any system noise due to installation Using the Balanced RCA input When using the Balanced 6 pin DIN input both switches MUST be in the BAL position Also we recommend that when using this input configuration the INPUT LEVEL switch be the 0 5 5V position and the gains on the amplifiers be set to minimum rotated counter clockwise The system gains should then be adjusted on the BLT or BLT4 Balanced Line Transmitter or other balanced line audio source For the pin configuration see the diagram below BALANCED 15 Vo 15 Volts Left Signal m _ Right
21. inputs Reference644s only CAUSE e No power or ground at amp No remote turn on signal e Blown fuse near battery No signal input The AIRBASS switch is in the IN position Move it to the OUT position Amp power supply fuse is blown or missing Speaker or leads may be shorted Verify adequate amplifier ventilation activation of the internal circuit breakers check to make sure channels l 4 are driving a 1 2 ohm per channel load or greater Speaker or leads may be shorted Make sure that the subwoofers are wired to channels 1 amp 2 e Select Intemal from ch s 1 amp 2 on ch 3 amp 4 input on the bottom of the amplifier see pages 14 17 e Be sure both Left and Right Input Signal Switches are set to the BAL position e Input signal level is too high readjust input gains or select the 0 5 5V input signal level range e Make sure the channel 2 Input Signal Switch is in the UNBAL position e Try the Input Signal Switch for channels 1 3 amp 4 in the BAL position leave the switches in the quietest position This will not affect the performance of the amplifier SERVICE Your Soundstream REFERENCE amplifier is protected by a limited warranty Please read the enclosed warranty card 26 PROTECTION CIRCUITRY Your REFERENCE amplifier is protected against both overheating and short circuits by means of the following circuits e Main power supply fuses e
22. ion ideal for driving subwoofers It is also used when large amounts of power are necessary for single speakers In bridged mono oniy the right channel input is active mM OM 5 MIXED MONO COHERENT STEREO BRIDGED MONO L R In bridged mono only the right channel input is active NOTE If you intend to drive a REFERENCE amp in mono but have stereo outputs from your crossover or source unit you can pot the switch in Mixed Mono but follow the normal wiring for Bridged Mono 11 ADVANTAGES on the amplifier O INSTALLATION STEP 2 jm BALANCED UNBALANCED INPUT The REFERENCE6445 amplifier has the ability to accept either standard Unbalanced RCA signal inputs or Balanced Pro Audio inputs with the use of the Soundstream BLT or BLT4 Balanced Line Transmitters or some other balanced line audio source Before installing your system you should decide upon which signal type you wish to run There are advantages to both UNBALANCED INPUT BALANCED INPUT 1 Improved Signal to Noise Ratio S N Ratio 2 Excellent noise cancellation 1 Most preamplifier source units have UNBAL RCA outputs industry standard characteristics 2 No Interface module is 3 Immune to noise radiated in necessary the car audio environment The REFERENCE644s amplifiers signal input accept two ranges of input signal levels 0 2 2 0 Vrms or 0 5 5 0 Vrms for bot
23. is ground in the vehicle REM Remote turn on input from the head unit Accepts 12V Speaker Output Connections Channels 1 amp 2 speaker connection terminal Crossover Output High pass low pass or full range output to an auxiliary am plifier Low Pass Crossover Adjustment Pot Crossover frequency setting for the low pass filter Amplifier channels 1 4 and crossover outputs High Pass Crossover Adjustment Pot Crossover frequency setting for the high pass filter for channels 1 amp 2 and crossover outputs input Level Channels 1 amp 2 Independent left and right channel input level con trols Inputs Channels 1 amp 2 right and left RCA inputs Speaker Output Connections Channels 3 amp 4 speaker connection terminal High Pass Crossover Adjustment Pot Crossover frequency setting for the high pass filter for channels 3 amp 4 Input Level Channels 3 amp 4 Independent left and right channel input level con trols Inputs Channels 3 amp 4 right and left RCA inputs Main Fuse Main power supply fuses Replace only with the same value fuses Coherent Stereo Bridge Mixed Mono switch Channels 1 amp 2 Input mode selector Amplifier Crossover Channels 1 amp 2 Select high pass low pass or full range operation Channels 3 amp 4 Input Select Selectable inputs from internal from channels 1 amp 2 or external from channels 3 amp 4 local inputs Coherent Stereo Bridge Mixed Mono sw
24. itch Channels 3 amp 4 Input mode selector Amplifier Crossover Channels 3 amp 4 Select high pass low pass or full range operation e Reference644s O i 1 Fault LED Indicates a blown fuse i 2 High Power LED Indicates amplifier power on in High Power mode 28 Auto High Current LED Indicates amplifier power on in High Current mode 3 2 4 Line Qut Crossover Switch Select high pass low pass or full range low level output tc au i auxiliary amplifier TE 32 33 34 5 Input Overload indicators Channels 1 amp 2 Indicates the signal input level or input gain level 27 as is too high 2 Hh E i j 6 Input Level Selector Switch Channeis 1 amp 2 Selectable input sensitivity range fram 0 2 2 26 175 Qs DD cad Volts RMS or from 0 5 5 Volts RMS x Rok a j y M 7 Left Channel Balanced Unbalanced Input Selector Switch Channel 1 Select Balanced to stes z A 4 i use the 6 pin balanced signal input Select Unbalanced to use the RCA signal inputs 254 C Ls L 8 Right Channel Balanced Unbalanced Input Selector Switch Channel 2 Select Balanced A cou to use the 6 pin balanced signal input Select Unbalanced to use the RCA signal inputs 1 Q 9 Input Overload Indicators
25. l automatically switch into High Current mode It will stay in this mode until the amplifier is turned off The next time it is powered up it will be in the High Power mode Unlike other amplifiers Soundstream s REFERENCE amplifiers can be configured to drive virtually any impedance and make maximum power The major advantages of this power supply are e awesome dynamic power capabilities e added continuous power with higher voltages e increased amplifier efficiency and reliability Because of the dynamic properties of most music all audio components should be able to react accordingly Thanks to their unique power supplies the REFERENCE amplifiers can comfortably exceed their rated power for dynamic portions of the music 10 INSTALLATION STEP 1 COHERENT STEREO MIXED MONO BRIDGED MONO The REFERENCE amplifier has the ability to operate in any one of the following modes Coherent Stereo with identical left and right stereo channels for maximum fidelity Best choice for satellite speakers Use this mode unless Mixed Mono is necessary Mixed Mono in order to drive stereo and mono simultaneously works well for center channels It can be used anytime you need a summed mono channel Somewhat sacrifices sonic accuracy as additional circuitry is introduced lo one channel In Mixed Mono the left channel is inverted see diagram below or on the bottom of the amplifier Bridged Mono for dedicated single channel operat
26. round terminal of the amplifier 4 To charge the capacitor bank touch the loose end of the ground cable to the open leg of the resistor for at least 45 seconds 5 Remove the resistor and connect the ground wire CIRCUIT BREAKERS FUSES EXTERNAL Like all audio components the REFERENCE amplifiers must be fused near the battery A fuse or circuit breaker must be located within 18 of the battery This will prevent a fire in the event of a shaded cable See the chart on the next page to determine the correct fuse value Continued on page 14 13 Continued From page 13 INTERNAL The REFERENCE amplifiers are fused with automotive type fuses In the event of blown power supply fuses the Fault indicator on the top panel will light The fuses are accessible via a plastic plug on the bottom of the amplifier See the chart below to determine the fuse value Never replace the fuses with a higher value than what is supplied This may result in amplifier damage and will void the warranty Amplifier Fuse Values Amplifier Amplifier Fuse Battery Fuse Circuit Breaker REFERENCE414s 2 25 amp automotive 60 amp REFERENCE644s 2 30 amp automotive 80 amp REMOTE TURN ON Connect the Remote to the turn on lead from the source unit When 12 volts is received the amplifier will turn on SIGNAL CABLE Use a high quality cable that will be easy to install and has minimal signal loss to guarantee optimum performance Soundstr
27. s the level of any channel receiving information from the low pass filter in the amplifier The Coherent Stereo Mixed Mono Bridged Mono switches stili function as normal Installing A RBASSTM involves removing the bottom plate of the amplifier adding the A RBASS circuit board and flipping a switch The switch is labeled on the amplifiers main circuit board DO NOT set the A RBASS switch to the IN position unless the AfRBASS module has been added DO NOT move the AIRBASSTM switch while the amplifier is ON Doing so may damage your speakers Please refer to the A RBASS owner s f installation manual for more details 19 SAMPLE SYSTEM 1 Reference414s and Reference644s 4 channels of RCA input 4 stereo channels of full range output SATELLITE SPEAKERS CHANNELS 1 amp 2 LOW PASS HIGH FULL RANGE p MIXED MONO STEREO BRIDGE SAMPLE SYSTEM 2 Reference414s and Reference644s 4 channels of RCA input 4 stereo channels of high pass output RCA line output set to low pass Line output to an external amplifier driving subwoofers SATELLITE SPEAKERS LL Head Unit CHANNELS 3 amp 4 INTERNAL INPUT ID EXTERNAL INPUT ROM CH 12 gBOc High Poss LLL 142 Eod 1 AI 24 di Oc Low Pass Filter LOW PASS HIGH PASS FULL RANGE tr 1 MIXED MONO STEREO BRIDGE
28. the high pass filter s to approximately 100 Hz Change the crossover points to accommodate a good mixture of frequency response power handling and personal preference 24 dB Oct Lew Pass N 2 dB Oct Hign Pass REFERENCE414s ONLY When any channel is configured in low pass it will be controlled by channels 1 amp 2 gain controls If you are going to configure one set of channels in high pass and one set of channels in low pass always use channels 1 amp 2 for low pass See SAMPLE SYSTEM 4 NOTE RCA signal output in high pass low pass and full range is derived from Channels 1 amp 2 input on the REFERENCE414s When the RCA signal output is in low pass on the REFERENCE644s the signal is summed from Channels I 2 3 amp 4 input The Subwoofer Level adjustment on the REFERENCE644s also applies to the RCA signal outputs 18 AIRBASS ACCESSORY OPTION Soundstream s new A RBASS feature can be added to the REFERENCE6445 amp REFERENCE414s amplifiers This feature allows wireless RF remote control level adjustment of the amplifier while the low pass filter on the amplifier s internal crossover is engaged AfRBASS does not control the level of the RCA signal outputs NOTE The AIRBASS accessory is intended to be used only while the REFERENCE amplifiers are driving a subwoofer s When the AIRBASS accessory is added to a REFERENCE414s and REFERENCE644s it control
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