Power Amplifier

W-5Power Amplifier

The first MOON Power Amplifier that was recognized a state-of-the-art component throughout its lifecycle. Also, the companion to the MOON P-5 preamplifier.

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Launched in 1999, Discontinued in 2005

The MOON W-5 was a balanced differential dual-mono power amplifier that produces 190 watts per channel into 8 ohms, 380 watts into 4 ohms and could be configured for mono operation. Employing our "Advanced Renaissance" technology featuring a "no overall feedback" circuit and bipolar output devices, the W-5 produced a warm, grain free sound common to some of the very best tube amplifiers, but had the reliability of solid state designs.

User manual

Technical aspects

A "no overall feedback" design resulting in real-time amplification, a more accurate musical
reproduction with respect to tonality, virtually non-existent intermodulation distortion and
the elimination of common phase errors resulting from feedback
An oversized power supply
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 circuitry up to the output stage
Stable to any known speaker impedance
"Class A" output to 5 watts for greater efficiency
Precision matched and fully decoupled Bipolar output devices which offer superb linearity
throughout the entire audio frequency spectrum
A high damping factor which yields superior musical dynamics, improved signal speed and
refined timbre accuracy
Extremely rigid chassis construction to minimize the effects of external vibrations
Accurate matching of the highest quality electronic components to tolerances as low as 0.01%
A very short signal path for a faster transient response
A symmetrical circuit design
Optional 12 Volt trigger for remote operations
Pure copper circuit board tracings with extremely low impedance characteristics
Designed to be powered up at all times for optimal performance
Low operating temperature for a longer than normal life expectancy.

Magazine reviews

 The Absolute Sound   (USA)  Anna Logg  Issue 130 - 2001
 Alta Fidelidad   (Spain)  Staff  No. 138 - Nov. 2002
 AUDIO   (Norway)  Roy Ervin Solstad  September 2004
 Audio Accessory   (Japan)  Staff  Autumn 1997
 Audio Music   (Russia)  Staff  3/2001
 The Audiophile Voice   (USA)  Les Turoczi  Vol. 4 No. 6
 Audiophilia   (www)  Andrew Chasin  March 1998
 Extreme Audio Video   (Greece)  Stathi Aspiotis  February 2002   #35
 Haute Fidelité   (France)  Zacharie Bourjet  November 2002
 HI-FI Journal   (Russia)  Staff  # 4 (33)   2000
 hi-fi+   (United Kingdom)  Roy Gregory  June/July 2000   #7
 HiFi Review   (Hong Kong)  Staff  November 2000   #174
 The Inner Ear Report   (Canada)  Ernie Fisher  1997 - Vol. 9 #3
 International Audio Review   (USA)  Peter Moncrieff  January 1999   #80   (www)
 Journey To Sound (Hong Kong)  Die Walkure  September 2000
 New Audiophile   (Hong Kong)  Staff  August 2002
 Positive Feedback   (USA)  David Robinson  1999 - Vol. 8, #2
 SoundStage!   (www)  Marc Mickelson  February 2000   (www)
 Stereo & Video   (Russia)  Artjom Avatinjan  March 2001
 Stereophile   (USA)  Kalman Rubinson  May 2001 Follow-Up   (www)
 Stereophile   (USA)  Kalman Rubinson  March 1999   (www)
 StereoSound   (Japan)  Staff  1997 - #123
 UHF Magazine   (Canada)  Gerard Rejskind  Vol. 70 - 2004   LE Version
 UHF Magazine   (Canada)  Gerard Rejskind  Vol. 49 - 1997
 YK Audio   (Hong Kong)  Staff  June 2004   LE Version
 YoHiFi   (China)  James Chung  December 2000