Congratulations on your purchase of the Audio Note (UK) M10 Line Pre Amplifier. It
is without doubt or question, one of the finest Line Level preamplifiers in production
today, only surpassed in performance by our own M10 Signature, and is a full Audio
Note (UK) Level 5 product.
It is well known that the accurate reproduction of music, not just sound, requires the
purity of the incoming signal to be preserved. It is therefore not difficult to conclude
that, in order to achieve this goal and to retain the musicality of the original
performance, the complexity of the circuitry itself must be kept to a minimum.
In response to this, the M10 Line preamplifier uses a single-ended, zero feedback
circuit topology. This is simply the most linear design possible, demanding pure
Class A valve operation and removing the need for a phase splitter, which introduces
unnecessary crossover distortion.
In contrast to the majority of the audio industry, we design our circuits with the aim of
minimising non-harmonic and time base anomalies, rather than producing
vanishingly small harmonic or low intermodulation distortion measurements. These
non-harmonic amplitude and time base distortions have a highly perceptible and
adverse affect on the signal waveform, and it is far more important to address these
factors than participate in the increasingly irrelevant numbers game that chases
‘perfect measured response’.
As a result, the M10 Line was designed for maximum linearity and minimum transient
distortion, and avoids the need for detrimental ‘corrective’ measures, such as
inherently error-prone feedback loops.
Rather than using separate controls for volume and balance, the M10 Line
preamplifier is equipped with a dedicated Audio Note (UK) stepped attenuator for
each channel. This not only brings the enormous improvements in sound quality
expected from the now legendary Audio Note (UK) stepped attenuators, but also
provides a level of channel balance accuracy that is impossible to achieve with
conventional volume and balance potentiometers.
The M10 Line features a pair of correctly engineered balanced / XLR inputs for
sources with suitable balanced outputs. Each input is connected directly to an in-
house custom designed and produced, silver wired input transformer, which offers
the finest possible input for your XLR Line level source outputs.
Each channel is powered by an independent external power supply, housed in a
Meishu sized chassis. As one would expect, the output transformers for the M10 Line
are some of the finest possible examples we can produce. Each transformer is fully
silver wound, and feature our own 55% nickel iron C-Cores.
(15 pages)
(4 pages)
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