Page 1
icon Audio
Instruction Manual Covering:
MB 150 Mono Blocks
KT 120/KT150 Version
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
Introduction of new KT150 valve:
Please treat all references to the KT120 as the
same for KT150.
Note: The supplied covers are too small for the
larger KT150 valve. They should only be used as
protection when the amplifier is not in use.
Thank you for purchasing the
MB150s
.
These pure valve mono block amplifiers are the
result of years of careful design and listening tests
with a huge range of speakers. The amplifiers are
hand built using carefully selected audiophile
components. The transformers are hand would
using low oxygen copper and special Japanese long
grain iron. Finally each amplifier is valved, carefully
commissioned and tweaked for best performance in
Leicester UK.
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
please contact your dealer or us for advice.
Valve amplifiers do need a little more attention than
their solid-state counterparts, but the sonic results
are more than worth it. In this manual we have tried
to include everything that you need to know. Please
let us know if you find any errors or feel that we
have missed anything out.
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, Digital,
etc, before being played through your own source
unit, the amplifier and finally loudspeakers.
Your room acoustics will 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. And not all recordings
are ‘equal’! Therefore a good amplifier will also
reproduce recording imperfections. Therefore setting
up and testing
should be made with a ‘clean’ well
balanced recording.
The
MB150
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 KT120 valves. These are in
fixed-bias mode which gives maximum power, cool
running and even indicates valve condition. You will
need to check the bias approx twice a year. The first
stage and phase splitting is done all triode for best
sound quality and low noise. They are sensitive
enough to be used with all modern source
equipment. Their 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.
IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH &
SAFETY INFORMATION FOR
YOU AND YOUR AMPLIFIER.
PLEASE READ & KEEP SAFE
AND REFER TO IF NECESSARY
