Filter
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control until the system gets loud but before the point of distortion. It is very important
SETTING THE GAIN
The gain control has been included to allow adjustment to properly
To properly set the gain, start by setting the gain to its minimum position and turn the
main radio volume up to 3/4 of maximum volume control. Then slowly raise the amp gain
sensitive and the music will play louder. Ideally, to properly level match the system the goal
By rotating the control in the clockwise direction, the amplifier's input will become more
is to achieve maximum output from the amplifier without distortion at about 3/4 of the
radio volume control.
when making these adjustments that you do not over drive the speakers that may be
have another person assist you by adjusting the gain control while you listen for distortion.
permanently damaged. The gain control should be adjusted very slowly. It may help to
match the signal output of the radio. This is one of the most
misunderstood adjustments. 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.
USING SUBSONIC FILTER AND PHASE CONTROL
20
Subsonic
50
30
Using the Subsonic Filter.
frequencies below that point. Generally, human ears cannot hear
low frequencies below 20 Hz.
displacement of the subwoofer cone. You would want to set the
subwoofers because they can generate over-could damage the
reproduction of inaudible low frequencies on the amplifier which
20~50Hz subsonic filter. This filter avoids the a variable
Models HA1000,HA700M, and HA1000M are equipped with
Mono subwoofer amplifier models, HA700M & HA1000M are
Phase
0
180
the phase shift of a subwoofer for a smooth blending, without
canceling the bass fromother speakers or subwoofer(s).
subwoofer(s) from0 to 180 degrees. This control helps to align
equipped with acontinuously adjustable phase lag control on
Using the Phase Control.
Fine tune the amplifier's input sensitivity.
frequency point where you want the filter not to produce