Introduction - moon 850P Owner's Manual

Introduction

Thank you for selecting the MOON 850P Dual-Mono
preamplifier as a part of your music/cinema system. This
preamplifier 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 the finest two-channel preamplifier
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 preamplifiers are so
musically satisfying.
Your new preamplifier is a true dual-mono design,
whereby each channel
independent of the other.
850P will continue to improve during the first 400 hours
of listening. This is the result of a "break-in" period
required for the numerous high quality electronic parts
used throughout this preamplifier.
Before setting up your new MOON 850P, we encourage
you to please read this manual thoroughly to properly
acquaint yourself with its features. We hope you enjoy
listening to the MOON 850P dual-mono preamplifier 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 850P dual-mono preamplifier incorporates
many significant design features to achieve its "world-
class" level of performance. This is an abbreviated list of
the more important features:
2-chassis design with one chassis (Controller) housing the
power supply, digital controller circuitry, software processing
6
850P Evolution
operates completely
The performance of your
Series
and the LED display. The other chassis (Preamplifier) contains
ONLY audio circuitry.
Our proprietary M-Octave Damping system that virtually
eliminates the sonically degrading "microphonic effect" by
mounting the main audio circuit board on an 8-point floating
suspension.
Custom proprietary toroidal transformer design with lower
magnetic, electrical and thermal loss, yielding an improved
power transfer and lower regulation factor. The result is
increased current speed and better dynamics.
An oversized dual-mono power supply features 6 stages of
DC voltage regulation and choke filtering.
TM
SimLink controller port allows for 2-way communications
between other
components.
M-Ray volume control circuit based on the R-2R resistor array
configuration that uses thin film surface mount resistors with
0.1% tolerances, resulting in no sonic degradation of the audio
signal regardless of the selected volume setting.
530 individual volume steps in 1dB and 0.1dB increments.
M-Lock circuit for "user selectable" maximum volume setting
lock-out for each line input.
Power supply voltage regulation includes i
Inductive DC Filtering); 1 inductor for each and every IC in the
audio circuit's signal path – 40 stages in all.
Full unsolicited RS-232 bidirectional feedback.
Gain offset for each line input with a ±10dB range.
Each line input is fully configurable to be "home theater
ready", where the volume control of the 850P is bypassed.
Four-layer PCB tracings; The advantages include better
ground and power supply circuit layouts resulting in a much
shorter signal path and dramatically improved signal-to-noise
ratio.
Ultra rigid chassis construction to minimize the effects of
external vibrations.
compatible MOON Evolution
2
DCf (Independent
Series