overview of connectors and controls
front panel
The front panel LED area includes rhe following indicators per channel:
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1 - level control
Calibrated potentiometers to alter the total gain of the power amplifier. In order to avoid distortions in mixing consoles upstream.
these controls should normally be positioned between 0 and 10. The calibraled markings show the additional a attenuation directly.
2 - protect led
When this LED is up during operation, one of the protection circuits against over-temperature, overload ,shorted outputs ,radio
frequency interference or DC faults has been triggered.The cause of the error e.g. shorted loudspeaker line must be remedied.
In case of overheating, wait for a few seconds until the amplifier switches back to operating mode itself.
3 - clip/limit indicator
This indicator signal is on if the amplifier output is clipping or limiting. It has two different indication states: If the clip limiter is
engaged, it has a short time constant, and it illuminates briefly. If the clip limiter is no engaged, it has an increased time cons-
tant, and it illuminates for a longer period.
4 - sig/hi imp leg
When the signal is green, it indicates normal operating range; when tbe signal is orange, it indicates high input impedance or
open load.
5 - power on indication
This LED light is on wben the mains switch is pressed. When not lit, the unit is not connected to the mains or the mains fuse has
blown.
6 - fan outlet grill
The amplifier uses forced air cooling. Air is taken from the rear inlet, and then excluded from the back. Do not obstruct the
intake and exhaust ports.
7 - power switch
The unit is switched on via the power switch. The loudspeaker outputs are switched on via delayed relays so that no startup
transients are audible. A current limiter prevents startup peaks on the mains line and prevents the mains fuse from blowing.
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User Manual