Manual ESX QM-TWO (page 10 of 32) (English, German, French, Italian, Spanish)

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AUDIO SIGNAL CABLES

WheninstallingtheaudiocablesbetweentheRCAoutputsoftheheadunitandtheRCAinputsoftheamplier,

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.

INPUT SENSITIVITY

OPERATING ELEMENTS

TurntheINPUTLEVEL(Fig.1,3)controlleroftheampliertotheMINposition.Thenturnthevolumecontroller

of the head unit to 80 - 90% of its full setting. Now turn INPUT LEVEL clockwise until you hear some distortion.

Then turn back the INPUT LEVEL slightly until you hear a cleaner sound.

VARIABLE HIGH PASS FILTER

Iftheamplier istobeusedformid-range/tweeter loudspeakers,settheswitchX-OVER(Fig. 1,2)toHPF.

Then set the desired cross-over frequency on the FREQUENCY controller (Fig.1,1). Thus to that only the fre-

quenciesabovethechosencross-overfrequencywillbeamplied.Thiseffectivelyminimizesdistortionsand

overloads at lower frequencies. A good point to start is at 125 Hz.

If you use loudspeakers (>20 cm) set X-OVER (Fig.1,2). to ”OFF”. In this case, the FREQUENCY controller is

without function (Fig.1,1).

VARIABLE LOW PASS FILTER

Iftheamplierisusedtodriveasubwoofer,settheswitchX-OVER(Fig.1,2)to„LPF“.Setthedesiredcross-

over frequency by using the FREQUENCY controller (Fig. 1,1). Thus to that only the frequencies below the

chosencross-overfrequencywillbeampliedandthesubwooferplaysmorepreciselyandefcient.

AUTO TURN ON

Theamplierdetectsavoltagerise(6Volts)withasocalled”DCOffset”overtheconnectedinputsignalonthe

HIGHLEVELINPUTS(Fig.1,5)whentheheadunitwillbeswitchedon.Hence,theamplierwillalsobeturned

on.Assoonastheheadunitwillbeturnedoff,theamplierturnsalsoautomaticallyoff.Inthiscasetheturn-on

connection (REM, Fig. 2,1) is not needed.

NOTE: The Auto Turn On function usually works with 90% of all head units, because they are equipped with

”High Power”-outputs. Only with a few older and still existing head units the Auto Turn On function is not work-

ing.

HIGH LEVEL INPUTS

The HIGH LEVEL INPUTS (Fig. 1,5) is suitable to connect the device input with speaker wires, if your head unit

isnotequippedwithpre-amplierRCAoutputs.Extendthereforeveryregardingspeakercablefromyourhead

unitwithappropriatespeakercablesfromyourcaraudioretailertothemountinglocationoftheamplier.Then

connect the each matching loudspeaker cable with the cables of the included HIGH LEVEL INPUT jack and set

the switch INPUT (Fig. 1,6) to position HIGH.

CAUTION: Never use the HIGH LEVEL INPUTS and the RCA inputs at the same time. This may damage

the device seriously. The loudspeaker cables of the HIGH LEVEL INPUT must have no contact to the ground

(GND) by any means.

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ESX QM-TWO Manual

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