icon Audio LA 4 Instructions

icon Audio LA 4 Instructions

Valve line amplifier

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LA 4
Thank you for purchasing one of our amplifiers, a lot
of care has gone into the design, selection of
components and production of this amplifier. We are
sure that you will hear the difference.
To get the best out of the LA 4. Please read the
enclosed notes. We have tried to give you all the
basic
information
you
recommend that everyone follows the 'quick set
up guide'. Should you be uncertain about anything
to do with your LA 4 please contact your dealer.
The LA 4 is a line amplifier designed to complement
high quality valve or transistor power amplifiers
requiring an input voltage of 1volt or greater. A lower
level output is also provided for more sensitive
amplifiers like Leak, or integrated amplifiers.
Our philosophy is to use traditional valve minimalist,
circuitry. The beauty of valve amplifiers is that they
are usually very simple; therefore with the use of
traditional point-to point construction, modern high
performance low tolerance components, it is possible
to very high sonic performance. This simplicity
enables us to avoid the use of printed circuit boards,
which are not ideal for valve amplifiers despite their
common use.
icon Audio
Valve Line Amplifier Instructions
About the LA 4
will
need.
We
would
Although technical performance is important, we
never forget that sound quality takes overriding
priority in our design and production. The LA 4 has a
massive overload capability and even then would go
into 'soft clipping', which is much more benign and
easier on the ear than overload with transistors.
The simplicity of the circuit means that there are
much fewer components for the signal to pass
through, fewer connections and switches, again
adding to the purity of sound. This simplicity also
means that we can use higher quality oversized
components, such as 2w resistors.
The use of popular valves, which are still in
production, means that obtaining replacements is
easy and inexpensive when necessary.
In the process of building the LA 4 to its high
standard no corners have been cut and we have also
paid close attention to the appearance.
The remote control has its own separate power
supply so the operation will not influence sonic
qualities.
The final result is an amplifier with excellent
characteristics, with an accurate yet smooth and
transparent quality.
Page 1

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Summary of Contents for icon Audio LA 4

  • Page 1 ‘soft clipping’, which is much more benign and To get the best out of the LA 4. Please read the easier on the ear than overload with transistors. enclosed notes. We have tried to give you all the...
  • Page 2: Final Inspection

    Final Inspection This amplifier has been carefully checked, tested and final adjustments made by Icon Audio in Leicester. It has passed our rigorous listening test and final inspection to assure you of optimum performance and reliability. Date …./…./…. Model ……….
  • Page 3: Connecting Inputs & Outputs

    Connecting a tape deck 2 Fit the rectifier valves. The LA 4 will work with any tape deck having suitable This should be obvious as there are only two types of output, and it is possible to record from any socket.
  • Page 4: Troubleshooting

    Service: Should you suspect a problem, you could screwdriver or similar and prise open. The fuse in return the unit to your dealer or Icon Audio for a use is the innermost the outer is a spare. Should the periodic service or return the valves for testing free of replacement fuse also blow there is a fault.
  • Page 5 When unpacking you may find it easier to remove the unit if you follow this procedure: 1. Turn the box “upside down” with the “flaps” open. 2. Then to lift the cardboard box off. 3. Remove the bottom packing first. 4.

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