Combining high power, sonic finesse and superb flexibility, the 340i will seduce you with its musical authority, as well as its rich, engaging and lifelike sound quality.


  • 6 (six) line-level inputs including a front-mounted 1/8” mini-jack for personal media players.

  • 1 (one) pair of balanced input (XLR).

  • Digital inputs with built-in DAC

  • Headphone output on 1/4” jack located on the front panel.

  • A massive oversized power supply using a custom toroidal transformer design.

  • “Class A” output to 5 watts for greater efficiency.

  • One audio input which functions as a “pass-through”, bypassing the gain stage to accommodate components like a home-theater processor, whose own volume control is used instead.

  • Precision matched proprietary MOON Bipolar output transistors for improved bass response and accurate sonic reproduction.

  • MM/MC Phono Input

  • DSD64/128/256 and PCM up to 32-bit/384kHz

  • Output Power at 8Ω100 W per channel

  • Output Power at 4Ω200 W per channel

  • Input Sensitivity370mV - 3.0V RMS

  • Input Impedance11,000Ω

  • Gain37dB

  • Signal-to-noise Ratio110dB @ full power

  • Frequency response (full range)2Hz - 90kHz +0/-3dB

  • Crosstalk-88dB

  • THD (20Hz - 20kHz @ 1 W)0.015%

  • THD (20Hz - 20kHz @ 100 W)0.05%

  • Intermodulation distortion0.03%

  • Optional Digital InputsS/PDIF, USB, Optical

  • Maximum PCM Resolution32-bit / 384kHz

  • DSD sample ratesDSD64, DSD128 & DSD256

  • Shipping weight28 lb / 13 kg

  • Dimensions (width x height x depth)16.9 x 3.5 x 14.8 in

  • 42.9 x 8.9 x 37.6 cm

Through it, music sounded fresh and subtly articulated, always in good balance and proportion. Like Marantz's classic tube gear, which it resembled in sound and appearance, this integrated amplifier was created for audio cognoscenti—those who know how rare a really well-engineered amp actually is. For these reasons, I believe the Moon by Simaudio Neo 340i will hold its value: The way it satisfied this listener with its Champagne Brut audio aesthetic should never go out of fashion. Confidently recommended.