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1 Introduction & final inspection
Thank you for purchasing the
Designed by David Shaw in Leicester. 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 our own unique LDT Tertiary hand
wound design hand wound using low oxygen copper
and special Japanese long grain iron. Each amplifier
is completed in Leicester, then valved, carefully
commissioned and tweaked for best performance.
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 for:
MB 30m Amplifiers
Shown with upgraded driver valves
Contents
1 Introduction
MB30m
8 Specifications
.
us know if you find any errors or feel that we have
missed anything out.
The
MB30m
valve) triode/UL power amplifier designed for the
excellent new KT120 power output valves. Many SE
amplifiers are of low power which limits the choice of
speaker. The new KT120 valve has enabled us to
develop an amplifier which has three times the
power of a single 300B, The MB30 will give ample
volume with most popular loudspeakers in most
situations, with a smoothness and richness that is
often lacking with push-pull designs.
MB30s operate in "fixed-bias" mode which gives
maximum power, cooler running and low distortion.
The MB30s 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. You MUST occasionally check the bias
this is easy with the built in meter.
is a Single Ended (one output
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Summary of Contents for icon Audio MB30m
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Page 1: Table Of Contents
Audio Instruction Manual for: MB 30m Amplifiers Shown with upgraded driver valves Contents 6 Bias adjustment 1 Introduction & final inspection 7 Valve replacement 2 Quick set up guide 8 Specifications 3 Connecting inputs & outputs 9 Guarantee 4 Getting the best performance... - 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. Date …./…./…. Model ………. Amp Serial Number ……….
- Page 3 MB30 SE Layout and Features The MB30s are not particularly sensitive to noise so therefore may be placed close to each other similar to a conventional power amplifier. Or alternatively place adjacent to each loudspeaker in order to keep the loudspeaker cable to a minimum.
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Page 4: Quick Set Up Guide
1 Unpack each unit carefully. Make sure that it (high sensitivity) operation. If use with a pre- is in good condition. If not report to Icon Audio or amplifier is required, the switch should be your dealer. It is important that you keep the “DOWN”... -
Page 5: Connecting Inputs & Outputs
MB30 only needs one minute to warm up and 15 What is safe maximum power? The MB30m will run happily all day long at any minutes to sound at its best. Valve life is approx undistorted power; the valves hardly stressed any 5000 hours, that is approx 7 months continuous more than at zero volume. -
Page 6: Trouble Shooting
6. Service: Should you suspect a problem, you could amplifier fuse is OK. return the unit to your dealer or Icon Audio for a 2. No sound periodic service or return the valves for testing free of Have you selected the right input? Is the “Tape Monitor”... -
Page 7: Bias Adjustment
If you suspect any of the valves are not working correctly removed, so take suitable care. It is not or you are concerned about their condition, Icon Audio necessary to remove the bottom cover. Beware will test the valves free of charge. Return them to us well... - Page 8 If you are uncertain about the condition of your valves Signal to noise level 98db (low gain) you may return them to Icon Audio for testing free of Signal to noise level 88db (high gain) charge. But like a LP stylus or car tyres valves have a ...
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Page 9: Guarantee
Thank you for purchasing one of our amplifiers. We guarantee becomes void if the unit has been trust you will be pleased with it. modified in any way not approved by Icon Audio. This amplifier is guaranteed by the dealer you 10 Packing Instructions... - Page 10 Engineers Notes These notes are only intended for use by an engineer qualified to work with high voltages found in valve amplifiers. Owners should refer any problems to a dealer or service agent. The amplifier may be inverted by supporting the transformers on non abrasive surface (e.g.