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GAIN
MIN
MAX
16
ENGLISH
Adjust the desired center frequency
for the bass boost
You can add up to 15dB of bass boost
at the selected bass boost frequency.
Select the crossover
point for your speakers.
ADJUSTING THE X-OVER, BASS AND SUBSONIC FILTER
Fine tune the amplifier's input sensitivity.
The gain sensitivity control for the “MGA”
amplifier is located on the side panel. This gain control
has been included to allow adjustment to properly
match the output of the radio. This is one of the most
misunderstood adjustments. By rotating the control in
the clockwise direction, the amplifier‘s input will
become more sensitive and the music will play louder. This is
not a volume control and you will not get more power out of the amplifier in the maximum
position! It may seem to deliver more output, but actually the system is only playing louder
faster as you turn the volume control on the radio. Ideally, to properly level match the
system the goal is to achieve maximum output from the amplifier without distortion at
about 3/4 of the volume control.
To determine if the amplifier’s gain is set properly, turn the system on and slowly increase
the volume control. You should be able to use about 3/4 volume before the system gets loud
but not distorting. It is very important when making these adjustments that you do not
over drive the speakers (at point of distortion) this will cause permanent damage to the
speakers. If you are unable to achieve 3/4 volume before distortion you will need to
adjust gain control (in this case you would reduce the gain). The gain controls should be
adjusted very slowly. It may help to have another person to assist you by adjusting the
gain controls while you listen for distortion.
FINE TUNE THE SYSTEM
MGA AMPLIFIERS
BASS BOOST
0
15
dB
30
250
XOVER
FREQ Hz
REMOTE
30
125
BASS
BOOST
10
80
SUBSONIC
FREQ Hz
PHASE
IN
OUT
FREQ Hz
The subsonic filter has been provided to filter
out unwanted subsonic bass frequencies below
the audible range of the woofer(s). This feature
helps to improve the amplifiers overall
performance since power is not wasted
reproducing frequencies beyond the speakers
operating range. This feature works in
conjunction with the Low-pass crossover to
provide band-pass filtering.
This control allows you to select the woofer(s) to be in phase with
the rest of the system (Defualt position) or out of phase if needed
to adjust for out of phase conditions. Please note: when running
multiple amplifiers and/or combining the power of 2 amplifiers,
please use settings explained on pages 13 and 14 of the manual.