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ENGLISH
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FEATURES
Supercurrent series: LR 230, LR 250, LR 270. Two-channels amplifiers with compact
dimensions and excellent musical performances.
The outstanding features of their sophisticated circuitry are: "FRONT END" stages
realised 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 symmetry.
The power amplifier is realized by a parallel of transistors with current capacity of 15
Amperes each. The PWM MOSFET power supply has been particularly designed to supply
the amplification stages with high currents. These features allow to drive very low loads.
In fact this series of amplifiers has been called Supercurrent for their easiness in driving
loads with 1 Ohm nominal impedance when they are connected in stereo and 2 Ohms
nominal impedance when they are connected in bridge mono.
Of course, as they are amplifiers with very compact dimensions in relation to their
performances, it is important to choose a well-ventilated place for their installation or, if
needed, to put a cooling fan near them when they work at very low loads, in order to avoid
excessive overheating.
PRECAUTIONS
· In order for this device to function properly it's important that it is installed in a spot where
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 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.
WARNINGS
· 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 its two channels don't have a common ground.
· REGULATIONS: If you hear saturation 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.
26
LR 270
MORE THAN 1000 WATTS WITH ELECTRONIC CROSSOVERS AND FADER
LR 270
LR 1140 M
LR 1140 M
SUBWOOFERS
LEFT
PRE OUT
REAR
LR 270
LR 270
LR 270
LR 1140 M
PRE OUT
FRONT
LR 270
HI-PASS
FRONT-LEFT
SUBWOOFERS
RIGHT
BRIDGE
270 W - 4 Ohms
HI-PASS
REAR
MONO
285 W - 2 Ohms
MONO
285 W - 2 Ohms
LR 270
LR 1140 M
HI-PASS
FRONT-RIGHT
STEREO
75+75 W - 4 Ohms
BRIDGE
270 W - 4 Ohms
LXR2 SXR2
3


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