icon Audio
Instruction Manual for:
MB 845 MK IIm Power Amplifiers
Shown with upgraded driver valves
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 845
MK II
. 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 well 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.
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
