W-8 Power Amplifier
Launched: 2005
Discontinued: 2012
MOON W-8 Silver MOON W-8 Black
The MOON W-8 Power Amplifier is a dual-mono balanced differential design, representing the next generation of MOON high-performance audio components. Producing 250 watts per channel of uncolored high-current output power at 8Ω (500 wpc into 4Ω and 1000wpc into 2Ω), the W-8 will drive virtually any loudspeaker to its maximum capabilities with incredible ease. This achievement is due, in part, to our new proprietary "Lynx" amplification circuit. Further raising the bar, the MOON W-8 can be fully integrated into a custom-install environment via an RS-232 port and 12V trigger. As well, a plethora of user selectable cosmetic options are available at the time of purchase.

W-8 Photo Gallery

Inside view of the W-8
Rear view of the W-8

W-8 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.
W-8 Detailed Specifications
Type Solid State
Configuration Dual-Mono / Balanced
Power Supply Transformers 2 x 1.3kVA
Power Supply Capacitance 240,000µF
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 1260mV RMS
Output Device Type Bipolars - 16 per channel
Output Binding Posts WBT - 2 pairs per channel
Output Power @ 8Ω 250 Watts
Output Power @ 4Ω 500 Watts
Output Power @ 2Ω 1000 Watts
Output Power - Bridged Mono 1000 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 50 Volts
Slew Rate 42 V/µs
Maximum Current - Peak 64 amperes
Maximum Current - Continuous 26 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 50 watts
AC Power Requirements 120V / 60Hz   220-240V / 50Hz
Fuse Replacement   120V   /   220-240V 10.0A long fast blow   /   5.0 long fast blow
Shipping weight 92 lbs / 42 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.)