Product Brochure
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Technical data and price changes reserved.
MUSICAL FIDELITY
www.musicaldelity.com
New Circuitry
Over the last 5 years our power amp circuitry has reached a high state of development. In our
never ending quest for improving performance and customer value we have been looking for
ways to improve our designs. One of the prime directives was to keep the low feedback con-
guration unchanged .. continue with low feedback! The problern was how to improve efcien-
cy and performance without affecting the sound quality.
If I say so myself, I think we have come up with a brilliant solution. Our new M8xi power amp
design gives higher power, lower distortion and better sound quality. Incredible but true.
The output stage efciency has been increased thus yielding about 10% more power for similar
power supply voltage. More importantly the whole driver stage is pure Class A. We believe that
this innovative approach has a substantial effect on the sound quality.
The sound stage appears wider whilst the micro and macro dynamics have more impact. This
effect is particularly noticeable on well recorded piano. I am sure you all know the piano is a
percussive instrument but in truth this is rarely audible on most Hi Fi systems.
Using an M8xi a piano‘s percussive nature becomes instantly obviously and jumps out of the
loudspeaker. lt is a surprising and satisfying improvement to the sound quality.
Vocals have more subtly, detail and presence. Large scale music has a depth, width and incre-
dibly dynamic presentation.
All in all the M8xi is a consummate all-rounder. Mostly it sounds like a small Class A amplier with
huge power.
Technical Performance
The M8xi delivers 550 + 550wpc into 8 ohms. It is extremely stable and very linear.
The distortion is low too; lower than 0.005% in the audible frequency range of 20 Hz to 20 kHz.
The M8xi has remarkable linearity and consistency. lt is unconditionally stable and will drive any
loudspeaker in existence easily with ample power reserve.
Our Approach to Technical Measurements
In our view an amplier should be completely neutral. lt is ‚a straight wire with gain‘. Easy to
say but hard and complex to do. We want to stress that we do not believe that the technical
performance is an end in itself. lt is a method of validating the total amplier system concept.
The aim of our circuit/PCB designs is to have low feedback and achieve complete neutrality,
transparency and great technical performance. The proof that we are on the right track is the
technical performance. We think that technical performance cannot be summed up by the
distortion at 1 kHz. Our view is that an amplier has to be able to satisfy a wide range of techni-
cal requirements before it can be neutral.
Linearity
Almost all loudspeakers have complex impedance and Ioading curves. An amplier must be
able to maintain its voltage virtually, regardless of loading. If an amplier cannot maintain its
voltage across the spectrum, then the ultimate frequency response and distortion will be non
linear. This is not neutrality.