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The Universal Sound
Owner’s manual
Introduction
Innovation characterises Audison products.
Smart ideas, new solutions, unique circuitry functions have satisfied designers’ spirit of
research and enthusiasts’ interest for a long time already. What else could be done?
If you have a close look at the marketplace, you can see there are amplifiers which provide
high power but whose size complicates installation, those with great sound but that are
“out of reach”, those with speakers input, with complete cables cover and protection, etc.
After careful analysis, paths chosen and left, different and cutting-edge mechanic and
electronic technics, Audison gave birth to a unique, flexible project, which can be easily
updated because of the quick market evolution, which has a sturdy structure and which
will be judged revolutionary.
The innovative LRx reflects the creativeness of those who were a landmark before it.
Directly derived from THESIS HV Venti experience and project, it follows its main principles.
ECI (Easy Common Interface) means all the inputs are driven through interchangeable and
reversible modules which permit to hide signal cables under the amplifier, be they on RCA
or high level ones; power cables can be hidden as well through proper plates.
LRx introduces also the microprocessor handling of vital functions in a single line of
amplifiers. Protection gets active; it co-ordinates power supply turn-on and turn-off, safety
intervention, it monitors temperature, it adjusts the control system for final stage thermal
stabilisation, limiting power supply voltage according to output current without affecting
signal. Every function has its own LED, which is located in a panel, protected by a
polycarbonate cover. The panel also houses crossovers independent controls; filters can be
bypassed and configured in the widest possible range, maximising use versatility. Circuits
layout is innovative, too; they sport a motherboard where power paths route and size were
optimised, where signal control module was separated for eliminating all interferences,
where a complementary differential, A class linear driver was used. Everything aims at the
best acoustic performance, in whatever situations.
It was not easy to concentrate all these features in one amplifier, but which other product
can offer as much? And as well as LRx can do?
If LRx causes some doubts due to habbit, as everything innovative does, it will be enough
to have a look at it, both inside and outside, to install it and listen to it to feel satisfied with
owning something special, something which does not want to show, rather to prove.
LRx 4.5 and LRx 4.1k are four channel car power amplifiers which can work in four, three
or two channel mode into down to 1 Ohm loads, supplying more than 1000 W power.
Signal input/output ECI modules and Auto Turn-ON function insure interfacing with any
source unit. One of the main features of its built-in crossovers, with filters up to 24dB/Oct,
is the possibility to create simple front-rear, front-sub or complicated multi-amplified
systems, always having a non-filtered output signal to extend the system.
Its superb tonal accuracy, its noticeable power reserve and its microprocessor controlled
management system make it the ultimate amplifier for high sound pressure level and
extraordinary musical performance.
Table of contents
Introduction
Table of contents
Packing contents
Safe Sound
General precautions
ECI – Easy Common Interface Modules
ECI – L Low Level: Pre-amplified Input/Output module
ECI – H High Level: High Level Input/PRE Output module
ECI module Installation
When mounting ECI in reverse
Power Supply/Outputs/Other Functions Panel
How to remove the cover
How to reassemble the cover
How to change the plate
Examples of how to use the plates
Power Supply and output terminal description
How to mount fast-on taker connectors
Other functions
Auto Turn-ON with SPK ON
Remote OUT with ECI-H
When using SUB VOL connector
How to replace the fuse
Control Panel
How to remove the cover
How to reassemble the cover
LRx 4.5 functions
Out Mode
LRx 4.1k functions
Out Mode
Level 0.3÷5 V
Filter
Subsonic
Diagnostic LED description
Installation
Amplifier fixing
Mounting template
How to run the cables under the amplifier
Audison logo in reverse
Connection cables
Speaker Cable recommendations
Power and Ground Cable recommendations
Pattern
Configuration
Inputs configuration
Filters configuration
Configuration diagrams
How to use pre-drilled cards
Technical specifications
Block diagram
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LRx 4.5
LRx 4.1k
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