Manual Audison vr 404 xr (page 3 of 22) (English, German, French, Italian)

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FEATURES

VR 404, VR 404XR. 4 channels amplifiers with very high acoustic performances. Every

functional, acoustic and aesthetical aspect has been carefully taken into consideration by using

innovative solutions and high quality components, paying meticulous attention to details and

providing accessory functions which allow the maximum practicality. PWM controlled power

supply uses MOSFET transistors which allow a significant power capacity without slackening

when the battery voltage diminishes. The final stage in the input employs a complementary

couple of constant current polarised differentials (through LED diodes) with clearly

advantageous results in terms of stability and timbre precision. The power stage is made of a

TRIPLE DARLINGTON for the maximum output current linearization, with final transistors

able to bear higher currents than those which are normally required by the most demanding use.

VR 404 has four PRE inputs, a BY-PASS output and an AMBIENT EQUALIZER for the

acoustic front expansion; the two channels couples can work in MONO and they can be driven

by only two PRE inputs.

VR 404XR has also one HI-PASS and one LOW-PASS crossover filters (with a variable “Q”

factor) which can be adjusted separately and which can’t be disactivated, with 12dB/Oct.

slope.

Because of these features your VR amplifier can give you only the very best emotions in

listening to music. Audison thank you for rewarding their work which is always aimed at

reaching the very best results.

PRECAUTIONS

·In order for this device to function properly it's important that it is installed in a spot where

the temperature doesn't fall below 0°C or rise above 55°C.

· It must be installed in a dry and well ventilated spot.

· The power supply voltage is 12 VCC with negative to ground. Make sure that the

characteristics of the vehicle electrical system are compatible with this device.

· For safe driving we advise to listen to music at a volume level that won't drown external traffic

sounds.

INSTALLATION

For mounting use 4 self-threading screws and protective plastic rings, provided. For a very

good result we suggest to use audison cable products to complete your installation. These

include: power cables, signal cables, speaker wires, RCA connectors and all accessories

needed to complete the wiring.

WARNING

· INPUTS: If the radio-cassette player doesn't share the output GND with the chassis, the

braided shield of the shielded cable must be connected to the radio-cassette player chassis.

· OUTPUTS: Never connect the -R and -L outputs to ground or to each other. If a crossover

filter is used be sure that its two channels don't have a common ground.

· REGULATIONS: If you hear distortion phenomena at moderate volume levels, it means that

a distorted signal is coming from the radio-cassette player. Turn radio-cassette player volume

down until there's no longer any distortion. Then adjust the calibration levels of the amplifier

until you hear slight saturation phenomena.

ENGLISH

VR 404

FRONT AND REAR SYSTEM (HI-PASS) AND SUBWOOFER (LO-PASS)

HI-PASS FRONT

SUB

HI-PASS REAR

OUTPUT

HI-PASS

OUTPUT FRONT

VR 404

FRONT SYSTEM (HI-PASS), REAR SYSTEM (PASSIVE HI-PASS) AND SUBWOOFER

HI-PASS FRONT

SUB

HI-PASS REAR

OUTPUT

HI-PASS

OUTPUT FRONTOUTPUT REAR

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Audison vr 404 xr Manual

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