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SERIES AND PARALLEL WIRING
REFERENCE
404s
4/3/2 Channel
Power Amplifier
2-4 ohm drivers in parallel
= 2 ohms
INS
4-4 ohm drivers in parallel
=1 ohm
2-4 ohm drivers in series
= 8 ohms
120 Blue Ravine Road Folsom California 95630 USA
ph 916.351.1288 fax 916.351.0414
rev A - 4.25.96
20
1
SOUNDSTREAM TECHNOLOGIES
TALLATION GUIDE
AND
OWNERS MANUAL
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CONGRATULATIONS! SERVICE You now own the REFERENCE404s Amplifier , the product of an Your Soundstream REFERENCE404s amplifier is protected by a limited uncompromising design and engineering phi losophy. Your Soundstream REFERENCE404s 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 feature s. Please retain this manual and your sales and installati
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TABLE OF CONTENTS PROTECTION CIRCUITRY Your REFERENCE404s amplifier is protected against both overheating and short circuits by means of the following circuits: Design Features ................................ ................................ . 4 - 5 • Auto High Current REFERENCE404s Diagram ................................ ............... 6 - 7 • • Auto High Current™ Power Supply ................................ ......... 8 • Smart Power Supply Thermal Rollback activating a
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SAMPLE SYSTEM #4 2 channels of high pass input with 2 channels of stereo output DESIGN FEATURES 2 channels of stereo low pass input with 1 bridged channel of output •Uncompromising Design and Construction including mil - glass epoxy circuit boards and high current custom gold - plated solid • Auto High Current™ - automatically customizes your amplifier to its particu lar application — High Current, low impedance loads (multiple subwoofers, less than 2 ohms mono) or High Power, higher i
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SAMPLE SYSTEM #3 2 channels of input with 2 channels of bridged high pass output External input to channels 3 & 4 with an external crossover •Fault Monitor LED on the top panel notifies you of blown power • 1/2 ohm Drive Ability - to drive virtually any load — all the way down to 1/2 ohm stereo (per mono. • Four Independent Dual Discrete Class A Drive Stages - Over six times t he drive current of most amps, which maintains performance TM • Drive Delay Muted Turn-on/off Circuit - A
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Reference404s SAMPLE SYSTEM #2 2 channels of input with 4 stereo channels of high pass output Internal input to channels 3 & 4 with an external crossover 6 15
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SAMPLE SYSTEM #1 4 channels of input Key to Callouts 4 channels of full range output 1. Fault LED - 2. High Power LED - mode. 3. Auto High Current™ LED - Indicates amplifier power on in "High 4. +12V - positive post. 5. GND - the vehicle. 6. REM - - on input from the head unit. Accepts +12V. 7. Speaker Output Connections - 8. Input Level - 9. Inputs - 10. Speaker Output Connections - 11. Input Level - 12. Inputs - 13. Main Fuse - value fuse. 14. Coherent Stereo
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INSTALLATION STEP 4 AUTO HIGH CURRENT™ POWER SUPPLY LEVEL SETTING The REFERENCE404s amplifier employs an extremely efficient Auto High The input levels are adjusted by means of the input level controls located on Current™ power supply (patent pending). This new power supply circuitry the front of the amplifier. This is a unique dual - stage circuit that adjusts both automatically customizes your amplifier for optimum efficiency and power level and gain. This topology maintains be
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INSTALLATION STEP 1 INSTALLATION STEP 3 INSTALLATION AND MOUNTING COHERENT STEREO™ / 1. AMPLIFIER LOCATION MIXED-MONO / BRIDGED MONO RENCE404s amplifier employs highly efficient circuitry and a unique Chassisink design to maintain lower operating temperatures. Additional The REFERENCE404s amplifier has the ability to operate in any one of the cooling may be required if the amplifier is located in a tightly c onfined area or following modes: When mounting the amplifier, it
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INSTALLATION STEP 2 WIRING (cont.) WIRING REMOTE TURN-ON POWER AND GROUND Connect the “Remote” to the turn - on lead from the source unit. When +12 To ensure maximum output from your REFERENCE404s amplifier, use high volts is received, the amplifier will turn on. quality, low - loss power and ground cables. The REFERENCE40 4s amplifier will accept up to 4 gauge power and ground cables. Determine from the chart SIGNAL CABLE - quality cable that will be easy to install and has
