1. +12V - Connected to a fuse or circuit breaker, then to the battery’s positive
terminal.
2. GND - Main ground connection. Bolt to a clean chassis point in the vehicle.
3. REMOTE - Remote turn - on input from the head unit. Accepts +12V.
4. Speaker connection Terminal - Speaker connections for satellite CH1&2.
5. Speaker connection Terminal - Speaker connections for satellite CH3&4.
6. Hawkins Bass Control “Boost” Adjustment - Varies from 0 to + 9 dB of
boost when the Hawkins Bass Control circuit is engaged.
7. Subsonic/Hawkins Bass Control Adjustment - Frequency adjustment
control for the Hawkins Bass Control filter or the Sub Sonic filter.
8. Low Pass Filter Control Adjustment- Frequency adjustment control for the
Low Pass Filter for CH3&4 sum X-OVER.
9. High Pass Filter Control Adjustment- Frequency adjustment control for the
High Pass Filter for satellite CH1&2.
10. High Pass Filter Control Adjustment- Frequency adjustment control for the
High Pass Filter for satellite CH3&4.
11. Input Levels - Input level control variable from 300mV to 5V.
12. RCA Inputs - 1&2 channel RCA inputs.
13. BALANCED Signal Input Connector - Channels 1 & 2 ; 6-pin Balanced signal input
connector for use with the Soundstream BLT Balanced Line Transmitter.
14. RCA Inputs - 3&4 channel RCA inputs.
15. BALANCED Signal Input Connector - Channels 3 & 4 ; 6-pin Balanced signal input
connector for use with the Soundstream BLT Balanced Line Transmitter.
16. Line out - Line level RCA output to drive an external amplifier.
17. Power LED - Indicates amplifier power.
18. Phase Switch - Adjusts the speaker phase to either 0 or 180 degrees.
19.ST/MO(2)/LP Switch - “MONO” for bridge mono operation with a single input signal
(Channel 2 only). “SUM” for bridged mono operation summing two input signals (1CH and
2CH). “ST” for normal stereo operation.
20. ST/MO(3)/LP Switch - “MONO” for bridge mono operation with a single input signal
(Channel 4 only). “SUM” for bridged mono operation summing two input signals (3CH and
4CH). “ST” for normal stereo operation.
21. Subsonic/Hawkins Bass Control Switch - Selectable subwoofer enhancement circuit.
Select “SUB SONIC” to engage the Sub Sonic filter with no boost. Use the knob indicated
by callout #7 to set the frequency: 13- 30Hz. Select “Hawkins Bass Control” to engage the
Sub Sonic filter with available boost. Use the knob indicated by callout #7 to set the
frequency: 30 Hz to 70 Hz.
22. High Pass X-OVER Switch - (Channels 1&2)Select”IN” for use with the internal crossover
or “OUT” for use with external crossover.
23. Mid-Bass/Midrange Select Switch - Selectable mid-bass “LOW” or midrange frequency
control “HIGH” operation.
24. High Pass X-OVER Switch - (Channels 3&4) Select “IN” for use with the internal crossover
or “OUT” for use with external crossover.
25. CH3&4 Fill De-emphasis Switch - (Channels 3&4) Select “IN” to activate 6dB/Octave filter
@ 7kHz.
26. Select “Full 1.2” (Channel 1.2 full range), “Full 3.4” (Channel 3,4 full range), “1.2
TRACKING LP” (use the knob or switch indicated by call out #9, #23)
27. Line output Switch - Select “Full 1.2” (Channel 1.2 full range), “1.2 TRACKING LP”(use
the knob or switch indicated by call out #9, #23) “3.4 LP SUM” (use the sum CH3.4)
Function for the RCA out put.
28. Channel Balanced / Unbalanced Input Selector Switch - Select “Balanced” to use the 6
pin Balanced signal input. Select “Unbalanced” to use the RCA signal inputs.
29. Input Overload Indicators - Indicates the signal input level or input gain level is too high.

KEY TO CALLOUTS

9