AUDIO SIGNAL CABLES
WheninstallingtheaudiocablesbetweentheRCAoutputsoftheheadunitandtheRCAinputsoftheamplier,
the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We
recommend a separated installation, e.g. routing the power cable through the cable channel on the left side
and the audio cables through the cable channel of the vehicle on the right side or vice versa. This prevents
interferences due to crosstalk into the audio signal.
SIGNAL OUTPUTS TO CONNECT ADDITIONAL AMPLIFIERS
The input signal on the INPUT jacks (Fig. 1,6) will be routed in stereo to the output jacks OUTPUT (Fig. 1,5).
ThustheOUTPUTjackallowstheconnectionofaadditionalamplier.
INPUT SENSITIVITY
OPERATING ELEMENTS
TurntheGAIN(Fig.1,9)controlleroftheampliertotheMINposition.Thenturnthevolumecontrollerofthe
headunit to 80 - 90% of its full setting. Now turn GAIN clockwise until you hear some distortion. Then turn back
the GAIN slightly until you hear a cleaner sound.
VARIABLE HIGHPASS FILTER
Ifthe amplieris tobe usedfor mid-range/tweeterloudspeakers, setthe switchesCROSSOVER(Fig.1,3)
to HPF. Then set the desired cross-over frequency on the HPF controller (Fig.1,2). Thus to that only the fre-
quenciesabovethechosencross-overfrequencywillbeamplied.Thiseffectivelyminimizesdistortionsand
overloads at lower frequencies. A good point to start is at 125 Hz.
If you use loudspeakers (>20 cm) set CROSSOVER (Fig.1,3). to ”FULL”. In this case, the HPF controller are
without function (Fig.1,2).
PROTECTION CIRCUIT
ThePRT/PWRLED(Fig.1,1)litsupgreen,iftheamplierisinoperation.
ThePRT/PWRLED(Fig.1,1)litsupred,whentheamplierisoverheated,orashortcircuitoccursresp.atoo
low impedance load is connected to the speaker outputs. If this events, the internal built-in protection circuit
shutsdown theamplierautomatically.Theampliershouldworkagainproperlyafter youhave solvedthe
problems.
VARIABLE LOWPASS FILTER
If the amplier is used to drive a subwoofer, set the switch (Fig. 1,3) to „LPF“. Set the desired cross-over
frequency by using the controller (Fig. 1,4). Thus to that only the frequencies below the chosen cross-over
frequencywillbeampliedandthesubwooferplaysmoreprecisedandefcient.
SWITCHABLE BASS BOOST
SWITCHABLE TREBLE BOOST
By using the BASS BOOST switch (Fig.1,8) you are able to increase the bass enhancement by 6 or 12 dB.
Attention: Use the BASS BOOST wisely!
By using the TREBLE BOOST switch (Fig.1,7) you are able to increase the treble enhancement by 6 or 12 dB.
Attention: Use the TREBLE BOOST wisely!
