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1. 2ch/4ch input switch- Leave this switch OUT if you are using 4 channels of input. Push the switch IN if you have only 2 channels of input to send input 1
and 2 to channels 3 and 4, respectively. (see page 15)
2. level controls- Use these controls to match the input level from the source unit to each pair of amplifier channels. (see page 15)
3. crossover 1/2 switch- this switch will turn the channel 1/2 crossover on or off, or send channel 3 and 4 signal to channels 1 and 2, respectively. (see page16)
4. crossover 1/2 frequency- This control sets the highpass crossover point for channels 1 and 2. (see page 16)
5. crossover 3/4 highpass switch- Push this switch IN to activate the channel 3/4 highpass crossover, or OUT to bypass the crossover. (see page 16)
6. crossover 3/4 highpass frequency- This control sets the highpass crossover point for channels 3 and 4. (see page 16)
7. crossover 3/4 lowpass switch- Push this switch IN to activate the channel 3/4 lowpass crossover, or OUT to bypass the crossover. (see page 16)
8. crossover 3/4 lowpass frequency- This control sets the lowpass crossover point for channels 3 and 4. (see page 16)
9. output switches- These switches determine whether the output is mono, bridged or stereo configuration for channels 1/2 and 3/4. (see page 15)
10. Constant Bass level- Use these controls to mix summed mono sub-bass information into channels 1/2 and 3/4. (see page 17)
11. Constant Bass frequency- This control sets the lowpass crossover point of the Constant Bass signal. (see page 17)
12. AC502 control- When using an optional AC502 remote level control, the AC502 will control the constant bass level when the switch is IN, or channel
3/4 level when the switch is OUT. (see page 17)
amplifier and crossover controls
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