Manual Audison lr 180 xr (page 3 of 20) (English, German, French, Italian)

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ENGLISH

CHARACTERISTICS

Supercurrent series: LR 180 M, LR 1140 M, LR 180 XR, LR 1140 XR

. One-channel amplifiers

of compact dimensions and excellent musical features. The

LR 180 M and LR 1140 M have a wide

band, therefore they are suitable for DUAL MONO installations or as mono SUBWOOFER

drivers where an external electronic CROSSOVER is provided. The LR 180 XR and LR 1140 XR

have an electronic CROSSOVER inside and are therefore specialize in driving the SUBWOOFERS.

The

outstanding features of the sophisticated circuitry are: “FRONT END” stages realized with

two complementary differential stages, polarized by two low Noise constant current sources. The

final stage configuration is made of an inverted triplet at pure complementary symmetry. The

power amplifier is realized by a transistor parallel with current capacity of 15 Amperes each. The

PWM MOSFET power supply has been particularly designed to supply high current at the

amplification stages. These features allow to drive very low loads; in fact this amplifier series has

been called

Supercurrent

for the easiness in driving loads with nominal impedance of 1 Ohm.

Of course, as they are amplifiers with very compact dimensions in relation to their performances,

it is opportune to choose a well-ventilated place for the installation when they work at very low

loads ore, if needed, a cooling fan can be placed near the device, in order to avoid excessive

overheating.

PRECAUTIONS

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

temperature doesn't fall below 0°C (32°F) or rise above 55°C (131°F).

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

· The power supply voltage is 12 Vcc negative to ground. Make sure that the caracteristics of the

vehicle's electrical system are compatible.

· For safe driving it's advised to listen to music at volume level that won't drown out external traffic

sounds.

INTALLATION

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

· INPUT: If the radio-cassette player's output GND isn't connected to car body, the braided shield of

shielded cable must be connected to the radio-cassette player's chassis.

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

used be assured that the two channels don't have a common ground.

· REGULATION: If you should 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 distortion phenomena.

LR 1140 XR

LR 270

LR 1140 XR

HI-PASS

FRONT-LEFT

L R

HI-PASS REAR

SUBWOOFERS

LEFT

LR 270

LR 1140 XR

MORE THAN 1000 WATTS SYSTEM

LR 270

LR 1140 XR

LR 270

HI-PASS

FRONT-RIGHT

SUBWOOFERS

RIGHT

BRIDGE

270 W - 4 Ohm

BRIDGE

270 W - 4 Ohm

STEREO

75+75 W - 4 Ohm

MONO

250 W - 2 Ohm

MONO

250 W - 2 Ohm

LR 270

LR 1140 XR

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Audison lr 180 xr Manual

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