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FRONT VIEW
Use the POWER switch located in the centre of the front panel to switch the appliance’s power
on. The soft-start function prevents current inrush peaks on the mains, which in addition prevents
the mains line protection switch from activating during power-on operation of the power amplier.
The loudspeaker outputs are activated via relay switching with a delay of approximately 2 seconds
effectively attenuating eventual power-on noise. The PROTECT LED lights during the delay time and
the fans run at maximum speed. This is normal to conrm the immaculate operation of the protection
circuitry. Upon power-on, all power amps with RCM-24 Module installed regain the state of operation
prior to the last power-off.
For example: if a power amplier had been switched off using the POWER-switch while being in Stand-
by mode, upon power-on it restarts in this exact mode.
This indicator lights when the power amplier has been switched on. Causes for the
POWER-indicator not lighting are: the appliance is not connected to the mains
network, a defective primary fuse, or the power amplier is set to stand-by operation
(STAND-BY LED lights).
This indicator light when the power amplier is in stand-by mode, which can be
activated from the RCM-24 or via Easy Remote. In stand-by operation only the
internal auxiliary power supply unit is activated. The main power supply unit is
separated from the mains.
The PROTECT LED lights indicating that one of the internal protection circuits
against thermal overload, short-circuit, Back-EMF, HF-occurrence at the output, etc.,
has been activated. In that case, the output relays separate the power amps from
the load connected to prevent the connected loudspeaker systems and the power
ampliers as well from being damaged. Whatever caused the fault – e.g. a short-
circuited speaker cable – needs to be remedied. In case of thermal overload you have
to wait until the power amplier automatically regains normal operation.
The OUT LED lights as soon as an audio signal of approximately 30dB below full
modulation is present. The LED is dimmed when speaker cables are short-circuited
or a protection circuit has been activated.
The 0dB LED lights when the power amplier is driven at its maximum. Higher input
voltage does not result in higher peak output voltage.
This indicator lights as soon as the integrated dynamic limiter is activated and the
power amplier is driven at the clipping limit or generally at its maximum capacity.
Short-term blinking is not a problem, since the internal limiter trims input levels of up
to +21dBu down to a S/N-ratio of approximately 1%. If, on the other hand, this LED
lights constantly, reducing the volume is recommended to prevent the loudspeaker
systems connected from being damaged by probable overload.