Professional Amplifiers
AX Series – Manual
PROTECT
Two red LED indicators per channel
In normal operation the LED remains off. If the LED comes up the thermal protection circuit is
activated. If the amplifier is becoming too hot, please leave the unit on, so that the neccessary
cooling by he automatic regulated fan brings the amp to normal operating temperature again.
When reaching this safe operating temperature the amplifier goes back to normal operation
within appr. 1 minute. Make sure that sufficient airflow from rear to front is possible and that
the rear cooling slots are not blocked.
A fast blinking of the peak LED indicates a short circuit or an overload of the output current
circuit and can lead to overheating of the amplifier. When distortion becomes noticable wit-
hout indication of the clip LED, the problem most likely is located in the chain before or after
the amplifier. Check wether the loudspeakers are faulty or the signal source is at too high levels.
The volume controls of the amplifier should be in the upper half (appr. 3 o‘clock) of the control
range, so that an input overload is avoided. If the protect LED remains on, the amplifier might
need servicing.
Volume controls
Rotate these controls clockwise to increase amplification and counterclockwise to reduce it. In
fully counterclockwise position the signal is attenuated by appr. 60 dB, which means you barely
might hear anything.
For safety reasons the knob of these controls can be removed and the holes can be filled with
the attached blind covers.
