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DMX1501/2501
FRONT PANEL DESCRIPTION
1. Power Switch
Although the DMX amplier features power-on mut-
ing, it is always a good idea to reduce both the gain
controls before turning on the amplier. The powering-
up procedure for an audio system should start from
instruments and then mixer, and you should verify that
all system operations are normal before turning on the
amplier.
2. Signal LEDs
Each channel of the power amplier features a signal
LED to show that an audio signal has been received
by the channel. The threshold for the indicator is -35
dB. Any noise above this level will cause the LED to
light.
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3. Peak LEDs
When the audio signal drives the amplier output cir-
cuit beyond its power capability, it will clip. The peak
limiter detects this and quickly reduces the gain to
minimize the amount of overdrive, so as to preserve
as much of the program dynamics as possible. The
Clip LED will also come on if the speaker terminals are
short circuited, or the impedance of the load between
them is too low. Under these circumstances, the LED
will stay on until the fault is rectied.
4. Gain Controls
These two knobs are the level controls for each chan-
nel of the amplier. The gain increases as the knob
is turned clockwise. This unit features detented gain
controls.
5. Power LED
When the power is on, this small blue LED will light
up.
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