5
BX AMPLIFIERS
OPERATION
Xover Switch:
Use the XOVER switch of the amplifier to set the internal crossover to LP/BP, HP (Subsonic) or
OFF. When the switch is set to OFF, a full bandwidth signal will be amplified. Set the switch to HP if you want the
amplifier’s internal crossover to serve as a highpass filter (SUBSONIC controller). Set the switch to LP/BP if you
want the amplifier’s internal crossover to serve as a low-pass filter. Additionally the SUBSONIC-controller works
in this mode to cut-off too low and annoying bass frequencies. Never change the crossover “LP/BP-HP-OFF”
switch setting with the audio system on!
Gain Control:
The input gain control is not a volume control. It matches the output of the source unit to the
input level of the amplifier. Turn the source unit up to about 3/4 volume (if the source unit goes to 30, turn it to
25). Next, slowly turn (clockwise) the gain on the amplifier up until you can hear audible distortion, then turn it
down a little.
Bass Boost Control:
The variable bass boost control is designed to give you increased output, 0–12dB, at
40 Hz. The setting for this control is subjective. If you turn it up, you must readjust the input gain control to avoid
clipping the amplifier.
Phase Switch:
The phase switch is designed to change the phase of the audio signal from 0° to 180°. The
setting for this switch is subjective and depends on the interior characteristics of your vehicle.
LP Freq/Subsonic Control:
The LP-control allows you to adjust the low-pass crossover frequency from
50–200Hz. The settings for this control is subjective; 80Hz is a good place to start. The subsonic-control allows
you in the LP/BP-mode to adjust the crossover frequency from 10-50Hz to cut-off ultra-deep frequencies in
the bass-signal. The settings for this control is subjective; 20Hz is a good place to start. In the HP-mode the
subsonic-control allows you to adjust the crossover frequency from 10-50 Hz.
Remote Bass-BXRC:
When the crossover on your BX amplifier is set to LP/BP pass, you have the ability to
control the output level of the amplifier remotely. To mount the BXRC remote bass level control, simply screw
the housing to the chosen location. Run the cable from the controller to the “Remote Bass” jack on the amplifier
chassis.
