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SERIES AND PARALLEL WIRING
REFERENCE
404s
4/3/2 Channel
Power Amplifier
2-4 ohm drivers in parallel
= 2 ohms
OWNERS MANUAL
AND
INSTALLATION GUIDE
4-4 ohm drivers in parallel
=1 ohm
2-4 ohm drivers in series
= 8 ohms
SOUNDSTREAM TECHNOLOGIES
120 Blue Ravine Road
Folsom
California 95630 USA
ph 916.351.1288
fax 916.351.0414
rev A - 4.25.96
20
1
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Summary of Contents for Soundstream REFERENCE 404s
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Page 1: Installation Guide
SERIES AND PARALLEL WIRING REFERENCE 404s 4/3/2 Channel Power Amplifier 2-4 ohm drivers in parallel = 2 ohms OWNERS MANUAL INSTALLATION GUIDE 4-4 ohm drivers in parallel =1 ohm 2-4 ohm drivers in series = 8 ohms SOUNDSTREAM TECHNOLOGIES 120 Blue Ravine Road... -
Page 2: Specifications
CONGRATULATIONS! You now own the REFERENCE404s Amplifier, the product of an uncompromising design engineering 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 features. Please retain this manual and your sales and installation receipts for future reference. -
Page 3: Table Of Contents
PROTECTION CIRCUITRY Your REFERENCE404s amplifier is protected against both overheating and short circuits by means of the following circuits: Auto High Current™ power supply Main power supply fuses Circuit breaker on each channel Smart Power Supply Thermal Rollback activating at 85°C A fail-safe thermal protection circuit activating at 95°C. -
Page 4: Design Features
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-spec glass epoxy circuit boards and high current custom gold-plated solid brass connections that will accept up to 4 gauge power/ground wire. - Page 5 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 supply fuses. 1/2 ohm Drive Ability - The REFERENCE404s amplifier is designed to drive virtually any load—all the way down to 1/2 ohm stereo (per channel) or 1 ohm mono.
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Page 6: Reference404S Diagram
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... - Page 7 SAMPLE SYSTEM #1 4 channels of input 4 channels of full range output Key to Callouts 1. Fault LED - Indicates a blown fuse. 2. High Power LED - Indicates amplifier power on in "High Power" mode. 3. Auto High Current™ LED - Indicates amplifier power on in "High Current"...
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Page 8: Level Setting
AUTO HIGH CURRENT™ POWER SUPPLY The REFERENCE404s amplifier employs an extremely efficient Auto High Current™ power supply (patent pending). This new 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 or less), they shut down, squash dynamics and power output (called current limiting), or waste huge amounts of power (i.e., low efficiency). -
Page 9: Installation And Mounting
INSTALLATION STEP 3 INSTALLATION AND MOUNTING 1. AMPLIFIER LOCATION The REFERENCE404s amplifier employs highly efficient circuitry and a unique Chassisink design to maintain lower operating temperatures. 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. -
Page 10: Wiring (With Diagram)
INSTALLATION STEP 2 WIRING POWER AND GROUND To ensure maximum output from your REFERENCE404s amplifier, use high quality, low-loss power and ground cables. The REFERENCE404s amplifier will accept up to 4 gauge power and ground cables. Determine from the chart up to 10’...
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