Moon i5.3 RS Integrated Amplifier (Used)


  • SoundStage! Equipment Review-
  • dual-mono design
  • “The i5.3’s sound was as solid and unwavering as its chassis.” “Everything was always under control, even as I stressed the i5.3’s output capabilities.”
  • WBT binding posts that accept banana plugs, spades or bare wire
  • 85Wpc into 8 ohms and 130Wpc into 4 ohms
  • Massive 500-volt-amp toroidal transformer


Moon i5.3 RS Integrated Amplifier (Used)
(***This is RS latest version)
Very good condition, no box, no original remote, Comes with Marantz remote control.

A legend is reborn … The MOON i5.3 Integrated Amplifier continues where the astounding MOON i-5 left off. More power and transparency are 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 MOON i5.3 is 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 integrated amplifier offers 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 provides 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.

Significant Design Features
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 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 · 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 c ommon 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.

Type Solid State
Configuration Dual Mono   (partial)
Power Supply Transformer 0.5kVA
Power Supply Capacitance 40,000µF
Class of operation – Preamplifier A
Class of operation – Amplifier A/AB
Single Ended Inputs   (RCA) 5 pairs
Input Device Types – preamp J-FET
Input Sensitivity 370mV – 3.0V RMS
Input Impedance 14,000 ohms
Tape Output 1 pair
Preamplifier Output 1 pair
Output Device Types – Amplifier Bipolars – 2 per channel
Output Binding Posts 5-way / Gold-plated / Shielded
Output Power @ 8 ohms 85 Watts per channel
Output Power @ 4 ohms 130 Watts per channel
Output Impedance 0.04 ohms
Damping Factor > 200
Gain Control RBG cs version
Gain 37 dB
Dynamic Headroom 3 dB
Signal-to-noise Ratio 97 dB @ full power
Maximum Output Voltage 23.5 Volts
Slew Rate 20V/µs
Maximum Current – Peak 18 amperes
Maximum Current – Continuous 10 amperes
Frequency Response 10 Hz – 70 kHz   (+0/-3 dB)
Crosstalk @ 1kHz -50 dB
IMD unmeasurable
THD   (20 Hz – 20 kHz @ 1 watt) < 0.1%
THD   (20 Hz – 20 kHz @ 85 watts) < 0.15%
Available Faceplate Finishes Black and Silver
Remote Control All-Aluminum Full Function
Power Consumption @ idle 45 Watts
AC Power Requirements 120V / 60 Hz     240V / 50 Hz
Fuse Replacement – 120V 4A long fast blow
Fuse Replacement – 230V 2A long fast blow
Shipping weight 29 lbs / 13 kgs
Dimensions   17 x 4 x 15 in.   (43 x 10 x 38 cm.)


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