860A Power Amplifier
The Evolution of
amplification ...

Large power reserves
allow the music to
reproduce naturally
and effortlessly.
MOON 860A Silver MOON 860A Black MOON 860A 2-Tone

The MOON 860A Power Amplifier is a balanced differential dual-mono design that effortlessly outputs 200 watts into 8Ω and 400 watts into 4Ω. Transparency and soundstage are exceptional, despite this amplifier's high power rating. Ultimately, the 860A will mate seamlessly with any loudspeaker allowing it to reach its full sonic potential, regardless of its load.

Several in-house developed advancements allow the MOON 860A to perform with both exceptional accuracy and a grain-free character; These include (i) MOON output transistors, specifically designed for use in our amplifiers, providing tighter and more visceral bass performance, as well as unprecedented linearity thoughout the entire frequency spectrum; and (ii) our advanced "zero global feedback" circuit, commonly referred to as Lynx.

Of course, key features you'd expect in a MOON Evolution Series product are present such as an RS-232 port and 12 Volt triggers for custom-install environments. Finally, a plethora of user selectable cosmetic options are available at the time of purchase.

The MOON 860A replaces the MOON W-7

860A Photo Gallery

Inside view of the 860A
Rear view of the 860A

860A Technical Features

· Lynx circuitry which is a "no overall feedback" design resulting in genuine real-time amplification, a more
  accurate musical reproduction with respect to tonality, virtually non-existent IMD and the elimination of
  common phase errors resulting from feedback
· 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
· A dual-mono oversized power supply
· 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 for superior musical dynamics, improved signal speed and refined timbre accuracy
· A very short capacitor-free signal path for a faster transient response
· Stable to any known speaker impedance
· "Class A" output to 5 watts for greater efficiency
· RS-232 port for (i) full unsolicited bidirectional feedback and (ii) firmware updates
· 12 Volt trigger input/output for remote operation
· 4-Layer printed circuit boards with pure copper tracings for a much shorter signal path;
  This results in greater sonic accuracy and a dramatically improved signal-to-noise ratio
· Designed to be powered up at all times for optimal performance
· Low operating temperature for a longer than normal life expectancy
· Ultra rigid chassis construction to minimize the effects of external vibrations
· Accurate matching of the very finest quality electronic components in a symmetrical circuit design.
860A Detailed Specifications
Type Solid State
Configuration Dual-Mono / Balanced
Power Supply Transformers 2 x 0.5kVA
Power Supply Capacitance 121,200µF
Class Of Operation A/AB
Balanced Inputs XLR - 1 pair
Single-ended Inputs RCA - 1 pair
Input Device Type J-FETs
Input Impedance 47.5KΩ
Input Sensitivity 1,100mV RMS
Output Device Type Bipolars - 12 per channel
Output Binding Posts WBT - 1 pair per channel
Output Power @ 8Ω 200 Watts
Output Power @ 4Ω 400 Watts
Output Power @ 2Ω 800 Watts
Output Power - Bridged Mono 800 Watts
Frequency Response 10Hz - 200kHz   (+0/-3dB)
Output Impedance < 0.01Ω
Damping Factor   (static) > 800
Gain 31dB
Signal-to-noise Ratio 106dB @ full power
Maximum Output Voltage 40 Volts
Slew Rate 42 V/µs
Maximum Current - Peak 48 amperes
Maximum Current - Continuous 22 amperes
Crosstalk @ 1kHz -105dB
IMD Unmeasureable
THD   (20Hz - 20kHz @ 1 watt) 0.015 %
THD   (20Hz - 20kHz @ 200 watts) 0.04 %
12 Volt Trigger Input/Output Operation Direct Logic (0V = off, 12V=on) using a 3.5mm
mono jack with an Input/Output impedance of
1000Ω and current requirement of 12mA
RS-232 Port 9-pin female DB connector
Power Consumption @ idle 55 watts
AC Power Requirements 120V / 60Hz   220-240V / 50Hz
Fuse Replacement   120V   /   220-240V 8.0A long fast blow   /   4.0 long fast blow
Shipping weight 90 lbs / 40 kgs
Dimensions   (w x h x d) 18.75 x 7.5 x 17.5 in.   (47.6 x 19.1 x 44.5 cm.)