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icon Audio Stereo 50 Instruction Manual

icon Audio Stereo 50 Instruction Manual

Kt88 amplifier

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1 Introduction & Final Inspection
Thank you for purchasing the
A great deal of care has been taken in the design,
selection of components and production of this
amplifier. We are sure that you will hear the
difference.
In order to get the best out of your amplifier,
please read the enclosed notes. Even if you are
experienced with hi fi please read the 'quick set
up guide'. Should you be uncertain about
anything to do with your amplifier please contact
us for advice.
Hi fi reproduction is a long chain of events that
includes the recording, editing, mixing etc, before
being transferred to a medium such as LP, CD, or
FM, before being played through your own source
unit, the amplifier and finally loudspeakers.
Your room acoustics will also affect the sound
before it finally reaches your ear. Whilst the
amplifier is arguably the most important part of a
system, it is important to remember that the
weakest link will always affect the final results
when making judgements. And not all recordings
are 'equal'! Therefore an amplifier which faithfully
reproduces the input signal will also reproduce
icon Audio
Instruction Manual Covering:
Stereo 50
KT88 Amplifier
Contents
1 Introduction
Stereo 50
.
8 Specifications
9 Guarantee
imperfections in the tonal balance and the
recording
itself.
Therefore
judgements should be made with a 'clean' well
balanced recording.
Stereo 50
The
stereo power amp, capable of running in either
Ultralinear (half pentode and half triode) or pure
triode mode, using the excellent KT88 valves.
These are in semi auto-bias mode which whilst
rarely requiring attention gives maximum power,
cool running and wear indication. The driver and
phase splitting is all triode for best sound quality
and low noise. The pre-amp is a high quality
'Passive' circuit using silver PTFE audio cable and
an ALPS 'blue' volume control. It is sensitive
enough to be used with all modern source
equipment having an output of 300mv or greater.
It may also be switched into power amplifier mode
to be driven by a separate pre amplifier. Its
simplicity coupled with point to point wiring hand
wiring without the use of printed circuit boards
results in an open euphoric sound that is
wonderfully detailed and warm sounding.
setting
up
and
is a push-pull Ultralinear
Page 1

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Summary of Contents for icon Audio Stereo 50

  • Page 1: Table Of Contents

    Audio Instruction Manual Covering: Stereo 50 KT88 Amplifier Contents 6 Bias Adjustment 1 Introduction & Final Inspection 7 Valve Replacement 2 Quick Set Up Guide 8 Specifications 3 Connecting inputs & outputs 9 Guarantee 4 Getting the best performance...
  • Page 2 Final Inspection - Your Guarantee of Quality To assure you of optimum performance and reliability, this amplifier has passed our rigorous final inspection and listening test by the Icon Audio team in Leicester . During which the final set up and adjustments were made.
  • Page 3: Quick Set Up Guide

    2 QUICK SET UP GUIDE 1 Unpack unit carefully. Make sure that it is in If your unit is fitted with the optional HT delay good condition. If not report to Icon Audio. It is circuit, only use the “Standby” when switching important...
  • Page 4: Connecting Inputs & Outputs

    “back off” the volume no more than necessary. If Speaker polarity. It is essential that you you still have to much gain Icon Audio can modify observe the polarity of the terminals; they the sensitivity to your specification. The tape input must be the same for the left/right connections will provide the most direct signal path.
  • Page 5: Getting The Best Performance

    Should the replacement everything switched speakers fuse also blow there is a fault you should disconnect connected? from the mains and seek qualified help or Icon Audio. Replacements should be 1.6 Amp ‘anti-surge’. Page 5...
  • Page 6: Bias Adjustment

    Service: Should you suspect a problem, you could return the unit to Icon Audio for a periodic service or return the valves for testing free of charge. You should carefully remove the valves (the KT88s should be held...
  • Page 7: Valve Replacement

    If the reading appears a little unstable this is happens gently bend the pins back into shape. normally due to mains fluctuations. The Stereo 50 uses (These valves are similar with the same pin semi-fixed bias, where the KT88 is allowed to find its connection;...
  • Page 8: Packing Instructions

    Icon Audio. This amplifier is guaranteed by the dealer you purchased from for 12 months from the date of...