MOON by Simaudio



The MOON 740P Preamplifier is a dual-mono, fully balanced differential design, following in the footsteps of the reference 850P preamplifier.

This “next generation” of preamplifier uses a host of Simaudio’s in-house technologies to help create an exceptional level of performance.


This product qualifies for free, remote installation by one of our technicians.

In-store purchase only, please call 0141 221 0221 or email glasgow@loud-clear.co.uk to reserve/enquire.
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Intended for those seeking high-performance in an elegant, stylish yet uncomplicated package, the 740P leaves your music uncoloured and free of any grain or noise; the purity of the signal remains uncompromised, allowing the music to be heard as was intended from day it was recorded. New technologies include the M-eVOL2 volume control, with a phenomenal 530 steps, allowing for an extremely precise level adjustment.

Moon by Simaudio 740P preamplifier

  • 4 stages of our M-LoVo (MOON Low Voltage) DC regulation circuit; a highly sophisticated circuit that is virtually free of noise, yielding an exceptionally fast, precise, and stable DC voltage. The result is a power supply with a virtually unmeasurable noise floor.
  • A dual-mono oversized power supply using 2 toroidal transformers in conjunction with 5 stages of DC voltage regulation and extensive choke filtering.
  • M-eVOL2 volume control circuit using MDAC’s (operating in a current steering R-2R configuration) which alter the audio signal’s amplitude, yielding no sonic degradation of the signal, regardless of the selected volume setting.
  • Power supply voltage regulation includes i²DCf (Independent Inductive DC Filtering); There is one inductor dedicated to each integrated circuit type component (DAC, Op-Amp, etc.) in the audio circuit’s signal path; 24 stages in all.
  • M-Lock for “user selectable” maximum volume setting lock-out for each line input.
  • “Gain offset” for each individual line input with a ±10dB range.
  • Each line input is fully configurable to be “home-theater ready”, where the gain section of the 740P is bypassed.
  • RS-232 port for (i) full unsolicited bidirectional feedback and (ii) firmware updates.
  • IR input for external control.
  • 12 Volt trigger output for remote operation.
  • SimLink™ controller port for 2-way communications with other compatible MOON components.
  • 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.
  • 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.
  • Includes FRM-3 remote control.


  • Number of inputs – XLR / RCA: 2 pairs / 3 pairs
  • Input Sensitivity: 200mV – 4.0V RMS
  • Input Impedance: 22,000Ω
  • Gain: 9dB
  • Number of Outputs – XLR / RCA: 1 pair / 2 pairs (fixed + variable)
  • Signal-to-noise Ratio (20Hz-20kHz): 120dB @ full output
  • Frequency response: 5Hz – 100kHz ±0.1dB
  • Crosstalk @ 1kHz: -116dB
  • Output impedance: 50Ω
  • THD (20Hz – 20kHz): 0.001%
  • Intermodulation distortion: 0.0003%
  • Shipping weight: 35 lb / 16 kg
  • Dimensions – each chassis (w x h x d): 18.75 x 4.0 x 16.5 in, 47.6 x 10.2 x 41.9 cm