Soundstream Reference Series 644S Installation Manual page 7

SAMPLE SYSTEM #3
2 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
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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" mode.
4. Line Out Crossover Switch - Select high pass, low pass or full range low level output to an
auxiliary amplifier.
5. Input Overload Indicators - Channels 1 & 2; Indicates the signal input level or input gain level
is too high.
6. Input Level Selector Switch - Channels 1 & 2; Selectable input sensitivity range from 0.2-2
Volts RMS, or from 0.5-5 Volts RMS.
7. Left Channel Balanced / Unbalanced Input Selector Switch - Channel 1; Select "Balanced"
to use the 6 pin Balanced signal input. Select "Unbalanced" to use the RCA signal inputs.
8. Right Channel Balanced / Unbalanced Input Selector Switch - Channel 2; Select
"Balanced" to use the 6 pin Balanced signal input. Select "Unbalanced" to use the RCA signal
inputs.
9. Input Overload Indicators - Channels 3 & 4; Indicates the signal input level or input gain level
is too high.
10. Input Level Selector Switch - Channels 3 & 4; Selectable input sensitivity range from 0.2-2
Volts RMS, or from 0.5-5 Volts RMS.
11. Left Channel Balanced / Unbalanced Input Selector Switch - Channel 3; Select "Balanced"
to use the 6 pin Balanced signal input. Select "Unbalanced" to use the RCA signal inputs.
12. Right Channel Balanced / Unbalanced Input Selector Switch - Channel 4; Select
"Balanced" to use the 6 pin Balanced signal input. Select "Unbalanced" to use the RCA signal
inputs.
13. +12V - Connected to a fuse or circuit breaker, then to the battery's positive post.
14. GND - Main ground connection. Bolt to a clean chassis ground in the vehicle.
15. REM - Remote turn-on input from the head unit. Accepts +12V.
16. Speaker Output Connections - Channels 1 & 2 speaker connection terminal.
17. Crossover Output - High pass, low pass or full range output to an auxiliary amplifier.
18. Subwoofer Level Control - Additional level control to any channel or line output receiving in-
formation from the internal low pass filter.
19. Low Pass Crossover Adjustment Pot - Crossover frequency setting for the low pass filter;
Amplifier channels 1 - 4 and crossover outputs.
20. High Pass Crossover Adjustment Pot - Crossover frequency setting for the high pass filter
for channels 1 & 2 and crossover outputs.
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.
24. Speaker Output Connections - Channels 3 & 4 speaker connection terminal.
25. High Pass Crossover Adjustment Pot - Crossover frequency setting for the high pass filter
for channels 3 & 4.
26. Input Level - Channels 3 & 4; Independent left and right channel input level controls.
27. Balanced Signal Input Connector - Channels 3 & 4; 6-pin Balanced signal input connector
for use with the Soundstream BLT Balanced Line Transmitter.
28. Inputs - Channels 3 & 4; right and left RCA (Unbalanced ) inputs.
29. Main Fuse - Main power supply fuses. Replace only with the same value fuses.
30. Amplifier Crossover - Channels 1 & 2; Select high pass, low pass or full range operation.
31. Coherent Stereo/Bridge/Mixed Mono switch - Channels 1 & 2; Input mode selector.
32. Channels 3 & 4 Input Select - Selectable inputs from internal (from channels 1 & 2) or exter-
nal (from channels 3 & 4 local balanced or unbalanced inputs).
33. Amplifier Crossover - Channels 3 & 4; Select high pass, low pass or full range operation.
34. Coherent Stereo/Bridge/Mixed Mono switch - Channels 3 & 4; Input mode selector.
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