Manual ESX Q-FOURv2 (page 10 of 32) (English, German, French, Italian, Spanish)

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INPUT SENSITIVITY CH1/2 & CH3/4

TurnthecontrollerINPUTLEVEL(Fig.1,6andg.1,11)oftheampliertotheMINposition.Thenturnthevol-

ume 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 CH1/2 & CH3/4

Iftheamplieristobeusedformid-range/tweeterloudspeakers,settheswitchesX-OVER(Fig.1,4andg.

1,7)toHPF.Thensetthedesiredcross-overfrequencyontheHPFcontroller(Fig.1,5org.1,10).Thusto

thatonlythefrequencies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bigloudspeakers(>20cm)setX-OVER(Fig.1,4andg.1,10)toFULL.Inthiscase,theHPFcontrol-

lers(Fig.1,5org.1,10)arewithoutfunction.

VARIABLE BASS BOOST CH3/4

By using the controller BASS BOOST (Fig. 1,9) you are able to increase the bass enhancement from 0 to 12

dB. ATTENTION: Use the BASS BOOST wisely!

HIGH LEVEL INPUTS & AUTO TURN ON

The high level inputs under HIGH LEVEL INPUT (Fig. 1,2) is suitable to connect the device input with speak-

er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.

CAUTION: Never use the high level inputs and the RCA inputs at the same time. This may damage the

device seriously.

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. 2,2) 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 head units the Auto Turn On function is not working.

INPUT MODE

By setting the switch INPUT MODE (Fig. 1,3) to the 2CH position, you switch the inputs to a 2-channel mode,

which allows a four-channel operation with only occupying the inputs CH1/2.

VARIABLE LOW PASS FILTER CH3/4

IftheamplierisusedtodriveasubwooferonCH3/4,settheswitchX-OVER(Fig.1,7)toLPF.Setthedesired

cross-over frequency by using the controller LPF (Fig. 1,8). Thus to that only the frequencies below the chosen

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

In LPF mode, the controller HPF (Fig. 1,10) can also be used to limit the frequency response downwards, for

example to produce a bandpass/subsonic signal. NOTE: If the controller HPF (Fig. 1,10) is set higher than the

he controller LPF (Fig. 1,8), no audio signal is audible.

If the channels CH1/2 and CH3/4 are used to drive two subwoofers, set the X-OVER switch (Fig. 1.4) to DUPE.

This will apply all CH3/4 settings for CH1/2. All controllers of CH1/2 are then without function.

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ESX Q-FOURv2 Manual

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