Introduction, 880m reference mono power amplifier – Simaudio 880M Amplifier User Manual
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880M Reference Mono Power Amplifier
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Introduction
 
Thank you for selecting the MOON 880M Mono 
power amplifier as a part of your hi-fi reproduction 
system. This power amplifier has been designed to 
offer state-of-the-art high-end performance in an
elegant package, while retaining all the sonic
hallmarks on which Simaudio has made its
reputation. We have spared no effort to ensure that
it is among the finest two-channel amplifiers 
available. We have been building high-performance 
audio equipment for over 30 years, and the
know-how gained through our cumulative
experience is an important reason why MOON
amplifiers are so musically satisfying. 
 
The performance of your 880M will continue to 
improve during the first 300 hours of listening. This
is the result of a “break-in” period required for the
numerous high quality electronic parts used
throughout this amplifier. 
 
Before setting up your new MOON 880M, we 
encourage you to please read this manual
thoroughly to properly acquaint yourself with its
features. We hope you enjoy listening to the
MOON 880M Mono power amplifier as much as the 
pride we have taken in creating this fine audio 
product. We understand the power and emotion of
music and build our products with the goal of
faithfully capturing these elusive qualities.
 
The information contained in this manual is subject 
to change without notice. The most current version
of this manual is available on our official website at
http://www.simaudio.com
Your MOON 880M Mono Power Amplifier incorporates many significant design features to achieve its “world-
class” level of performance. This is an abbreviated list of the more important features: 
 
Proprietary “Lynx” Technology which eliminates 
feedback. The results are: Real-time amplification is 
achieved since interactions from the speaker back to the 
amplifier are virtually eliminated; More accurate musical 
reproduction with respect to tonality; Virtually non-
existent transient intermodulation distortion (which is far 
more degrading to sonic performance than harmonic 
distortion); The elimination of common phase errors 
resulting from feedback. 
A custom proprietary toroidal transformer design 
with lower magnetic, electrical and thermal loss, yielding 
an improved power transfer and lower regulation factor, 
resulting in increased current speed and better dynamics. 
Fully balanced differential circuitry up to the output 
stage. 
Output stable to any known speaker impedance.
Class A output to 10 watts for greater efficiency. 
 
RS-232 port for i) full unsolicited bidirectional feedback 
in custom installation setups and ii) firmware updates. 
An oversized power supply.
An exceptionally short signal path for a faster 
transient response. 
Precision matched and fully decoupled proprietary 
MOON Bipolar Output transistors with unprecedented 
gain linearity resulting in improved bass response and 
even more accurate sonic reproduction. 
A high damping factor which yields superior musical 
dynamics, improved signal speed and refined timbre 
accuracy. 
Ultra rigid chassis construction to minimize the effects 
of external vibrations. 
Designed to be powered up at all times for optimal 
performance.