Integrated Amplifier

i5.3Integrated Amplifier

The i5.3 was the next generation version of the legendary MOON i-5 and included more features and power.

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Launched in 2006, Discontinued in 2009

A legend is reborn … The MOON i5.3 Integrated Amplifier continued where the astounding MOON i-5 left off. More power and transparency were just the tip of the iceberg; producing a maximum continuous power output of 85 watts per channel into 8 ohms and 130 watts into 4 ohms, the i5.3 was housed in our highly regarded extremely rigid chassis. Featuring five line-level inputs, a user-configurable “home-theater ready” input, an IR input for the flexibility of external control and military-specification internal components, this special integrated amplifier offered a level of sonic performance found in some of the very finest separate amplifier/preamplifier combinations.
A home entertainment system built around the MOON i5.3 provided for a unique opportunity to own a significant piece of audio history. Magnificent performance, genuine ease-of-use and an elegant physical appearance all wrapped into one very dynamic package.

User manual

Technical aspects

IR input for external control (all discrete codes)
One line input which bypasses the gain control stage to accommodate a component, such as a
home-theatre processor, whose own volume control is used instead
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 extremely short capacitor-free signal path measuring only 14 inches in length from input RCA's
to output binding posts, eliminating virtually all potential sources of interference and producing a
sonically faster transient response
The power amplifier section uses a "no overall feedback" design resulting in real-time amplification,
more accurate musical reproduction with respect to tonality, virtually non-existent IMD and the
elimination of common phase errors resulting from feedback
The gain section uses a Crystal microprocessor functioning as a "shunt to ground" that doesn't
degrade sonic performance regardless of the volume setting
Class A output to 5 watts for greater efficiency
Precision matched Bipolar output devices which offer superb linearity throughout the entire
audio frequency spectrum
Accurate matching of the very finest high quality electronic components
A symmetrical circuit design
PCB w/ pure copper tracings & gold plating that yields low impedance characteristics
Extremely rigid chassis construction to minimize the effects of external vibrations
Improved reliability through the elimination of moving parts
Designed to be powered up at all times for optimal performance
Low operating temperature to ensure a longer than normal life expectancy.

Magazine reviews

 Audio Magazine   (Korea)  Staff  September 2010   RS version
 AudioArt   (Taiwan)  Staff  2009   #251   RS version
 Audiofil   (Croatia)  Erden Radoncic  April 2007   (www)
 HI-FI Choice   (UK)  Jason Kennedy  June 2008   RS version
 HI-FI Choice   (Croatia)  Staff  December 2008   RS version
 HI-FI Choice   (Croatia)  Staff  July 2008   RS version
 HiFi Net   (Korea)  Staff  November 2006
 hi-fi+   (United Kingdom)  Paul Messenger  January 2007   #48
 Monde de la Musique   (France)  Staff  December 2007
 Prestige Audio Video   (France)  Ghislain Prognord  May/June 2008   #130
 Son & Image   (Canada)  Michel Berard  March/April 2006   Vol. 7 no. 4
 SoundStage!   (www)  Philip Beaudette  February 2007   (www)   (Korea)  Staff  February 2007
 What HI*FI?   (France)  Staff  May 2008