The Neo 340i X is a stereo integrated amplifier from Moon by Simaudio, the Canadian company that builds its equipment in its own factory in Quebec and covers it with a 10-year warranty. It belongs to the Neo series and is the higher powered sibling of the entry-level 240i. The 340i X is designed as a compact centre for a system, with room inside for optional phono and digital modules that turn it into a full control unit.
Key specs that matter
Rated output is 100 W per channel into 8 ohm and 200 W per channel into 4 ohm, and the first 5 W are delivered in class A before the circuit moves into class AB. Gain is 37 dB, input sensitivity runs from 370 mV to 3.0 V RMS and input impedance is 11 kohm. Distortion is quoted at under 0.015% at 1 W and under 0.05% at 100 W across 20 Hz to 20 kHz, with intermodulation under 0.03%, crosstalk of -88 dB and 110 dB SNR measured at full power. The response extends from 2 Hz to 90 kHz, +0 or -3 dB. The chassis is 42.9 x 8.9 x 37.6 cm and ships at 13 kg in black, silver or two-tone finishes, depending on region.
Engineering and use context
A custom toroidal transformer feeds an oversized power supply, and the output stage uses proprietary MOON bipolar transistors in matched pairs. Moon keeps the number of interstage capacitors in the signal path low. There are six line-level inputs, one of them a front 3.5 mm mini-jack for portable players, plus a balanced XLR pair. One RCA input works as a pass-through that bypasses the gain stage, so a home theatre processor can control volume while sharing the same speakers. The front panel also carries a 6.35 mm headphone output. The optional DAC module adds S/PDIF, optical and USB inputs with PCM up to 32-bit and 384 kHz and DSD64, DSD128 and DSD256, and an optional phono stage handles MM and MC cartridges. For custom installs the rear carries SimLink, a 12 V trigger, RS-232 for control and firmware updates, and an IR input, and the CRM-2 remote is supplied.
Pairing
With output doubling into the lower load, the amplifier suits passive speakers with low impedance dips. Buyers who play vinyl can fit the phono board and connect a turntable directly, and the DAC board lets a computer or streamer with a digital output connect without an outboard converter.
Alternatives
The Moon 240i sits below it as the entry integrated in the range, rated at 50 W per channel into 8 ohm with a built-in DAC and MM phono stage.