Bazooka MGA11000H, MGA11500H Fine Tune the System, Adjusting the X-OVER, Bass and Subsonic Filter

ADJUSTING THE X-OVER, BASS AND SUBSONIC FILTER

		This control allows you to select the woofer(s) to be in phase with
The subsonic filter has been provided to filter		the rest of the system (Defualt position) or out of phase if needed
		to adjust for out of phase conditions. Please note: when running
out unwanted subsonic bass frequencies below
		multiple amplifiers and/or combining the power of 2 amplifiers,
the audible range of the woofer(s). This feature
		please use settings explained on pages 13 and 14 of the manual.
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	SUBSONIC	REMOTE		XOVER
provide band-pass filtering.	FREQ Hz		PHASE FREQ Hz		Select the crossover
	10		30		point for your speakers.
			IN
	80		OUT
			250
	BASS
	BOOST
	30	0
125		dB
		15
	FREQ Hz	BASS BOOST
Adjust the desired center frequency			You can add up to 15dB of bass boost
for the bass boost			at the selected bass boost frequency.

ENGLISH

	FINE TUNE THE SYSTEM
Fine tune the amplifier's input sensitivity.
	Th 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. This gain control
MIN	has been included to allow adjustment to properly
MA	match the output of the radio. This is one of the most
	misunderstood adjustments. By rotating the control in
GAIN	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.

16 MGA AMPLIFIERS