Page 1
icon Audio
Instruction Manual Covering:
MB 845 Mono Block
Amplifiers
Shown with upgraded driver valves (courtesy of Hi Fi World)
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
MB 845s
.
These pure valve mono block amplifiers are the
result of years of careful design and listening tests
with a wide range of speakers. The amplifiers are
hand built using carefully selected audiophile
components. The transformers are hand wound
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
“SET UP” notes. These contain important
information about the correct operation and safety.
Should you be uncertain about anything please
contact your dealer or one of our team.
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 wit
h a ‘clean’ well
balanced recording.
The
MB 845
are push-pull all triode power
amplifiers using the fabulous 845 high power triode
valves. These have very special characteristics
which many people consider give the finest
reproduction of any valves. Similar to the 300B but
with more power and punch. These are in fixed-bias
mode which gives maximum power, cool running
and low distortion. You MUST occasionally check
the bias (at least twice a year). The driver and phase
splitting are also triode for best sound quality and
low noise. The MB 845s are sensitive enough to be
used with any pre-amplifier or passive in most
situations. . 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
Summary of Contents for MB 845
Page 3: ...Page 3...
