Limiter settings
If you program your own presets in addition to the factory presets, we strongly recommend that you calculate and
set the limiter settings for the respective channels precisely in order to protect your connected speakers from
overload! The limiters are already set at the factory presets.
USER MANUAL PowerPac 4003 DSP
16
© PL-Audio GmbH & Co.KG | Siegener Straße 6 | 57482 Wenden | www.pl-audio.de Version: October 2021 V 1.0
2.8 Installation
Please note that if the device is cold and transported into a warm environment, condensation will form inside the
device. To avoid damage and malfunctions due to condensation / moisture, let the device acclimatise first.
To avoid unpleasant and possibly damaging noises in the loudspeakers, always switch the individual components
on in the direction of the signal path. So first the player, then the mixer and only at the end the power amplifiers.
When switching off, just proceed in reverse order.
After switching on the device, a self-test and initialization are carried out. The fan runs up once for approx. 4
seconds. During the start-up process, the loudspeaker outputs of the power amplifier are muted and are
activated automatically as soon as the power amplifier is ready for operation. This protective circuit prevents
unpleasant "cracking" noises in the loudspeakers.
The amplifier is ready for operation approx. 10 seconds after switching on.
ATTENTION:
The power amplifier has no gain control on the front panel! The setting of all output levels is made in
the Digital Signal Processor (DSP) either by using the built in encoder wheel and the display or the PL-Audio DSP-
Control Software on a computer.
Before switching on the power amplifier for the first time, it is not possible to check which volume or which
speaker preset is set! Therefore, please always turn the volume level of your signal source (mixer) to a
minimum.
When you have made all connections, switch on the amplifier, check whether the correct preset is loaded and
increase volume gently until you hear the signals from your speaker system. If you do not hear an output signal on
the connected loudspeakers, check the cabling again before turning the level up any further. In any case, avoid the
limiter LED lighting up continuously (page 9, upper figure, item 2). This not only leads to a loss of sound, but can
also damage connected speakers!
