Table of Contents
Advertisement
Quick Links
SERIES AND PARALLEL WIRING
REFERENCE
644s
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 - 5.20.96
24
1
Advertisement
Table of Contents
Related Manuals for Soundstream Reference Series 644S
Summary of Contents for Soundstream Reference Series 644S
- Page 1 = 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 Folsom California 95630 USA ph 916.351.1288 fax 916.351.0414 rev A - 5.20.96...
-
Page 2: Protection Circuitry
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. -
Page 3: Troubleshooting
This will not affect the performance of the amplifier. SERVICE Your Soundstream REFERENCE644s amplifier is protected by a limited CAUSE Design Features ... 4 - 5 Reference644s Diagram ... 6 - 7 High Power / Auto High Current™ Power Supply Design ... 8 Selecting Input Modes ... -
Page 4: Design Features
4 gauge power/ground wire. Line output to an external amplifier driving subwoofers Auto High Current™ - Soundstream’s newest 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). - Page 5 The 6-pin din plug carries (+) and (-) Signal information for left and right channels, audio ground, and ±15 Vdc to operate the Soundstream BLT Balanced Line Transmitter. AIRBASS™ Upgradable - This feature allows RF remote control level adjustment while the low pass filter on the amplifier's internal...
- Page 6 Reference644s SAMPLE SYSTEM #4 4 channels of RCA input 2 stereo channels of high pass output 1 bridged channel of low pass output (NOTE: Due to the internal summing circuitry of the amplifier's low pass filter, fading to the satellites will never completely defeat the subwoofers.)
- Page 7 21. Input Level - Channels 1 & 2; Independent left and right channel input level controls. 22. Balanced Signal Input Connector - Channels 1 & 2; 6-pin Balanced signal input connector for use with the Soundstream BLT Balanced Line Transmitter. 23. Inputs - Channels 1 & 2; right and left RCA (Unbalanced ) inputs.
-
Page 8: Auto High Current™ Power Supply
(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). -
Page 9: Installation Step
SAMPLE SYSTEM #1 4 channels of RCA input 4 stereo channels of full range output INSTALLATION STEP 1 COHERENT STEREO™ / MIXED-MONO / BRIDGED MONO The REFERENCE644s amplifier has the ability to operate in any one of the following modes: Coherent Stereo™... -
Page 10: Crossover Adjustments
The REFERENCE644s amplifier has the ability to accept either standard Unbalanced RCA signal inputs, or Balanced "Pro Audio" inputs with the use of the Soundstream BLT Balanced Line Transmitter or some other balanced line audio source. Before installing your system, you should decide upon which... -
Page 11: Level Setting
4 gauge power and ground cables. Determine from the chart REFERENCE644s By setting all 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. -
Page 12: Installation And Mounting
Use a high-quality cable that will be easy to install and has minimal signal loss to guarantee optimum performance. Soundstream’s DL1 and SL1 are ideal when using the Unbalanced RCA inputs. While using the Balanced DIN input, use the cable supplied with the BLT.
Need help?
Do you have a question about the Reference Series 644S and is the answer not in the manual?
Questions and answers