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icon Audio
Instruction Manual Covering:
Stereo 40 MK IV
KT88
Contents
1 Introduction & Final Inspection
2 Quick Set Up Guide
3 Connecting inputs & outputs
4 Getting the best out of your amplifier
5 Trouble Shooting
6 Bias Checking & Valve Replacement
7 Specifications
8 Packing and Shipping
1 Introduction
Thank you for purchasing the
Stereo 40 MK
IV.
This is the 4
th
incarnation of the Stereo 40. First
introduced in 2000 it has undergone many
refinements and upgrades which make it one of
the finest amplifiers in its class having very high
resolution when used with high quality input
material and loudspeakers.
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
as Icon Audio or your agent for advice.
Valve (or Tube) amplifiers do the same job as a
solid state amplifier, but they do it differently and
generally have a warmer, more textured sound.
Your ears will have become accustomed to your
old amplifier, so it may take some hours before
your ears attune themselves to the new sound.
Your source, loudspeakers and room acoustics
will also affect the sound before it finally reaches
your ear. Some people find a small adjustment in
re positioning their speakers can help too. The
weakest link will always affect the final results
when making judgements. Not all recordings are
‘equal’! Therefore an amplifier which faithfully
reproduces the input signal will also reproduce
imperfections in the tonal balance and the
recording itself. Setting up and judgements should
be made with a ‘clean’ well balanced recording.
The
Stereo 40 MK IV
is a push-pull Ultralinear
stereo power amp, capable of running in either
Ultralinear or pure triode mode, using the
excellent KT88 valves in fixed bias. The driver and
phase splitting is all triode. The pre-amp is a high
quality ‘Passive’ circuit using silver audio cable
and an ALPS volume control. It is sensitive
enough to be used with all modern source
equipment having an output of 250mv or greater.
Its simplicity coupled with point to point hand
wiring without the use of printed circuit boards
results in an open euphoric sound that is
wonderfully detailed and warm sounding.
IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH & SAFETY
INFORMATION FOR YOU AND
YOUR AMPLIFIER. PLEASE
READ & KEEP SAFE AND
REFER TO IF NECESSARY
