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icon Audio
Instruction Manual Covering:
Stereo 50
KT88 Amplifier
Contents
1 Introduction & Final Inspection
2 Quick Set Up Guide
3 Connecting inputs & outputs
4 Getting the best performance
5 Trouble Shooting
6 Bias Adjustment
7 Valve Replacement
8 Specifications
9 Guarantee
10 Packing Instructions
1 Introduction
Thank you for purchasing the
Stereo 50
.
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
imperfections in the tonal balance and the
recording itself. Therefore setting up and
judgements should be made with a ‘clean’ well
balanced recording.
The
Stereo 50
is a push-pull Ultralinear
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.
