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IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH &
SAFETY INFORMATION FOR
YOU AND YOUR AMPLIFIER.
PLEASE READ & KEEP SAFE
AND REFER TO IF NECESSARY
1 Introduction & Final Inspection
Thank you for purchasing the
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 99.9999% pure low oxygen copper and higher
grade special Japanese long grain iron. Finally each
amplifier is valved, carefully commissioned and
tweaked for best performance in Leicester UK.
The MB845i is very similar to the original keeping all
the original features but with several improvements
including our "Low Distortion Tertiary" output
transformers and an improved power supply.
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
icon Audio
Instruction Manual Covering:
MB 845i Mono Block
Amplifiers
Contents
1 Introduction
MB 845i
8 Specifications
.
us know if you find any errors or feel that we have
missed anything out.
The
MB 845i
amplifiers using the fabulous 845 high power triode
valves. These have very linear 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 845is 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.
The
MB 845i
ambitious amplifiers we have made to date. Their
performance when properly set up is amazing, so
take your time to read and do things according to
this manual.
are push-pull all triode power
are the finest and most
Page 1
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Summary of Contents for icon Audio MB 845i
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Page 1: Table Of Contents
Audio IMPORTANT! Instruction Manual Covering: THIS MANUAL CONTAINS ESSENTIAL HEALTH & MB 845i Mono Block SAFETY INFORMATION FOR YOU AND YOUR AMPLIFIER. PLEASE READ & KEEP SAFE Amplifiers AND REFER TO IF NECESSARY Contents 6 Bias & Hum Adjustment 1 Introduction &... - Page 2 Final Inspection - Your Guarantee of Quality To assure you of optimum performance and reliability, this amplifier has passed our rigorous final inspection and listening test by the Icon Audio team in Leicester . During which the final set up and adjustments were made.
- Page 3 MB 845i Valve Insertion Page 3...
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Page 4: Quick Set Up Guide
‘Trouble Shooting’ section or contact Icon Audio. 1 Unpack each unit carefully. Make sure that it is in good condition. If not report to Icon Audio. It 6a Passive/Power Amplifier Operation Switch is important that you keep the packaging for Located on the rear, this switch is “UP”... -
Page 5: Connecting Inputs & Outputs
You can either ‘hard wire’ your cable to the The MB 845i is designed to work with full range, amplifier by baring enough cable to fit in the low to medium efficiency speakers having connector and twist together to avoid any spare impedance between 4 ohms to 8 ohms. -
Page 6: Trouble Shooting
Service: Should you suspect a problem, you could your dealer, or only if you feel competent. return the unit to your dealer or Icon Audio for a Disconnect amplifier from the mains power and wait periodic service or return the valves for testing free of 20 minutes before removing bottom plate. -
Page 7: Bias & Hum Adjustment
If you are unsure about any aspect contact your retailer, the others. Icon Audio or a competent service engineer. When checking the bias ensure that any “Active” pre- amp or source is “off” with zero volume to prevent false readings. -
Page 8: Valve Replacement
2, The valve gets noisy/microphonic. Usually happens Icon Audio are happy to check the valves/amp or re- to the small valves, and can be confirmed by tapping bias your amp free of charge. -
Page 9: Guarantee
Thank you for purchasing one of our amplifiers. We guarantee becomes void if the unit has been hope you will be pleased with it. modified in any way not approved by Icon Audio. 10 Packing Instructions This amplifier is guaranteed by the dealer you...