Bazooka Mardi Gras Series MGA4150 Installation Manual page 11

A
2 CH. BASS = 2 channel input with bass boost on front and rear channels
2 CH = 2 channel input with bass boost on the front channel
4 CH = 4 channel input with bass boost on front channels only
You can add up to 16dB of bass boost
by adjusting the Bass Boost control.
Select the crossover
point for your front speakers.
Fine tune the amplifier's input sensitivity.
GAIN
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.
DJUSTING THE X-OVER AND BASS
Select the source input
BASS
BOOST
0
dB
16
SOURCE
FRONT
FREQ Hz
HIGH
110
LOW FULL
55
240
600
330
point for your rear speakers.
Select the crossover type for the
front speakers
F
INE TUNE THE SYSTEM
T h e g a i n s e n s i t i v i t y c o n t r o l f o r t h e " M G A "
amplifier is located on the side panel.
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
Select the operation mode for the
FRONT
2 CH. BASS STEREO
2 CH. BRIDGED (F R IN)
L+R MONO
4 CH.
REAR
FREQ RANGE
X 1
FREQ Hz
X 10
110
LOW
55
240
600
330
Select the crossover
X-over Frequency Multiplier
Out = X1 (55Hz - 600Hz)
In = X10 (550Hz - 6Khz)
10
front and rear channels
POWER
REAR
L+R MONO
BRIDGED (F L IN)
STEREO
HIGH
FULL
Select the crossover type for the
rear speakers
This gain control
MGA AMPLIFIERS