KEY to Callouts

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 + 9dB 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 Subsonic filter.

8.Low Pass Filter Control Adjustment - Frequency adjustment control for the Low Pass Filter, 40 - 160Hz.

9.High Pass Filter Control Adjustment - Frequency adjustment control for the High Pass Filter, 50 - 500Hz or 500 - 5kHz for CH1 & 2.

10.High Pass Filter Control Adjustment - Frequency adjustment control for the High Pass Filter, 50 - 500Hz for 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 “SUBSONIC” to engage the Subsonic filter with no boost. Use the knob indicated by callout #7 to set the frequency: 13- 30Hz. Select “Hawkins Bass Control” to engage the Subsonic filter with available boost. Use the knob indicated by callout #7 to set the frequency: 30Hz to 70Hz. In Hawkins Bass Control Mode, there is a tracking Subsonic filter to protect woofers.

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.Frequency Range Selection Switch - Switching to “LO” selects the 50 - 500Hz range. Switching to “HI” selects the 500 - 5kHz range.

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 @ 8kHz.

26.Channel 3&4 Input Mode - “FULL 3-4” requires 4 signal inputs. “FULL 1-2” uses the same signal from 1-2 for 3-4. “1-2 TRACKING LP” sends a lowpass signal to 3-4 derived from the highpass sent to 1-2 via #9.

27.Line Output Switch - Select “FULL 1-2” for full range signal output.

Select “1-2 TRACKING LP” for a lowpass signal at the frequency for highpass at #8. Select “3-4 LP Sum” for a summed signal of channels 3-4 (mono bass output signal).

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.