4
●
Make sure nobody can reach the Gain controls of the amplifier. You have just set the ma$imum level the DJ is able to
produce. Your neighbors will be glad….. (in some cases the DJ is not )
3. SUB bass gain control:
This potentiometer is used to control the sensitivity of the sub bass amplifier. Put on some
music and turn this control slowly up until there?s a nice balance between the high/mid satellite speakers and the
subwoofer.
4: Protect LED:
The protection LED is on when the speakers are disconnected from the amplifier. This occurs in the following situations:
5: Clip LED
Turns on just before the maximum, distortion free, output level of the amplifier. The clip leds may turn on shortly from time
to time but they may certainly not turn on for longer periods. In this case you have to turn the output level down!
6:
SUB phase invert indication LED
Truns on when the phase invert switch( rear panel) was pressed, indicate current SUB output phase was 180
°
inverted
.
REAR PANEL:
1: CH1/CH2 XLR/JACK inputs
You can connect these balanced inputs to balanced and unbalanced line level audio sources (example: DJ-mixer)
2: X-OVER FREQ. control
(crossover frequency control) adjusts the cutoff frequency of the active filter. This crossover frequency can be set in a
range of 90 to 250Hz. It up to you to adapt its position to your own taste. For most subwoofers 90Hz to 150Hz seems to
be the best choice.
3: SUB processor
Controls the amount of low band signal, produced by the bass processor, from zero to maximum. The setting depends on
the application and can be adapted to your own taste.
Important :
Note that the bass processor should be used with care to avoid possible speaker damage. Most smaller and
economical subwoofers are not capable of handling the low frequencies produced by this unit.
4: PHASE INVERT switch
Sometimes the conductors of the subwoofer are inversed which results in poor sound quality with a lack of low
frequencies: the opposite of what you expected! This can be corrected by inversing the (+) and (-) poles of the cabling to
your subwoofer or
……
by pushing the PHASE INVERT switch! Use a thin pen to press the phase invert switch and
compare the results of both positions. The position with the most bass production is the right one!
5: GROUND LIFT switch
In some cases nasty hum noises can occur due to ground loops in your setup. Setting the Ground lift switch to the position
“lift”breaks the ground loop between the amplifier and the chassis grounds of various other components in your setup. As
a result the hum noises disappear.
