Integrated Amplifier

i-5Integrated Amplifier

The MOON i-5 has been a wonderful success for Simaudio. A nice and very musical amplifier that managed to touch the heart of many audiophiles around the world.

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Launched in 1999, Discontinued in 2005

The MOON i-5 integrated amplifier combines numerous technologies such as our proprietary "Advanced Renaissance" amplifier technology which eliminates feedback; a preamplification section using "Class A" dual-mono circuit topology and extremely rigid extruded aluminum chassis construction.

User manual

Technical aspects


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
An extremely short capacitor-free signal path measuring only 15 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
Amplifier section using a "no overall feedback" design resulting in real-time amplification, more accurate musical reproduction with respect to tonality, virtually non-existent IMD (intermodulation distortion) and the elimination of common phase errors resulting from feedback
Gain section using a Crystal microprocessor functioning as a "shunt to ground" that doesn't degrade sonic performance regardless of the selected setting
'Class A" output power to five watts for greater efficiency
One single-ended audio input which bypasses the gain control stage to accomodate a component, such as home-theatre processor, whose own volume control is used instead
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
Pure copper circuit board tracings with extremely low impedance characteristics
Extremely rigid chassis construction to minimize the effects of external vibrations
Improved reliabilty through the elimination of moving parts
Designed to be powered up at all times for optimal performance
Low operating temperature for a longer than normal life expectancy.

Magazine reviews


MAGAZINE  REVIEWER DATE / ISSUE
 Audio Music   (Russia)  Staff  3/2001
 audioMusings   (USA)  Staff  Dec. 1998, No. 5
 The Audiophile Voice   (USA)  George Graves  Vol. 6 No. 3
 Audio Video   (Indonesia)  Tim Avi  July 2004
 Bound For Sound   (USA)  Martin deWulf  10/98
 Fi Magazine   (USA)  Robert Harley  February 1999
 Haute Fidelite   (France)  Z.Bourjet & L.Thorin  December 2004  LE Version
 Haute Fidelite   (France)  Z.Bourjet & L.Thorin  June 2003
 Haute Fidelite   (France)  Herve Benichou  July 1998
 HI-FI Choice   (United Kingdom)  Jason Kennedy  April 2003   #240
 Hi-Fi News   (United Kingdom)  Ken Kessler  May 2002
 hi-fi+   (United Kingdom)  Chris Thomas  September 2005   #40
 hi-fi+   (United Kingdom)  Chris Binns  Feb/March 2000   #5
 HiFi Review   (Hong Kong)  Staff  March 2004   #213
 HiFi Review   (Hong Kong)  Staff  April 2002   #191
 HI-FI WORLD   (United Kingdom)  David Price  May 2002
 hxos   (Greece)  Staff  May 2002   #350
 The Inner Ear Report   (Canada)  Ernie Fisher  1998 - Vol. 10 #4   (www)
 Secrets of Home Theater & High Fidelity  Arvind Kohli  October 2002   (www)
 Son & Image   (Canada)  Staff  2004  Vol. 6 no. 1  LE Version  
 SoundStage!   (www)  Doug Schneider  May 1999   (www)
 Stereo   (Germany)  Holger Barske  March 2004
 Stereophile   (USA)  Chip Stern  July 2002   (www)
 UHF Magazine   (Canada)  Gerard Rejskind  Vol. 56 - 1999
 What Hi*Fi?  (Russia)  Staff  March 2004   LE Version