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Sim Moon Neo 340IX Integrated Amp/Streamer/DAC with Remote Boxed
Sim Moon Neo 340IX
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Posted On 6.10.2025
Last Update On 6.10.2025 Sim Moon Neo 340IX
Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX Sim Moon Neo 340IX
Description Original Description is in English, other language texts are translations and can contain errors. EnglishDeutschSpanishTurkish Excellent with original packaging.

Sim Moon neo 340I integrated amplifier

the Neo 340i, which is specified as producing 100Wpc into 8 ohms or 200Wpc into 4 ohms. The Maggies' infamous hunger for current was satisfied by the 340i's ability to continuously deliver up to 30V at 12 amps, with 22-amp peaks. The Neo 340i uses four bipolar transistors per channel, operated in class-A for the first 5W, and in class-AB for all subsequent joules per second.

I am a slow-working audio reporter. I need months—sometimes a year—to get a proper feel for a product. This is especially true with integrated amplifiers, because today's models can be heavily laden with features, each of which takes time to appreciate. The Moon Neo 340i has been in and out of my system for more than a year—so long that I had to upgrade its DAC and firmware to finish this review. The basic 340i, without phono stage or DAC module, can be had for $4700. Later, you can add a moving-magnet/moving-coil phono stage ($400) and/or a DSD DAC ($900). That's $6250 for Lune Ö la carte. Or you can buy a 340i that includes all of these options—Simaudio calls the package the D3PX—for $5800. Simaudio sent me the D3PX edition.

 

The Moon Neo 340i D3PX is a textbook example of a contemporary, top-quality, full-featured integrated amplifier. On its backside are four analog RCA inputs, one of them dedicated to the phono board, and four digital inputs: TosLink, two S/PDIF RCAs, and USB. There are two line-level (RCA) analog outputs: one fixed, the other variable. Standard features on all Neo 340i amps include: SimLink, to provide two-way communication among various Simaudio Moon components, including the MiND streamer; a 12V trigger; a RS-232 port for custom installation, bidirectional feedback, and firmware updates; and an IR port for external control.

On the Neo 340i's classy-looking signature faceplate are a ¼" headphone jack and a 1/8" Media Player (MP) input jack. Just above those are two buttons: Spk Off, which turns off the output signal to the speakers when you're using headphones; and Mute, which switches off the output signal to everything, including the fixed and variable RCA outputs.

To the left of the central, red-lit display is a cluster of five buttons. At the top is Standby, which disengages the input section from the remainder of the 340i's circuitry, though all circuits remain powered up. Just below that are buttons to engage the MP input and to turn the display off and on, and below those are two more, for toggling between input options.

Page 14 of the Neo 340i's manual is dedicated to the operation of its remote control. At the bottom, it states: "NOTE: The buttons labeled don't affect the operation of the 340i." Immediately, I knew: Simaudio has done this only to annoy me. Boooo! Hiss! Grrrr!

With speakers: Magnepan .7

The more I use the Magnepan .7s ($1400/pair), the more I love them. Their extraordinary imaging, sweetness of tone, and down-to-earth naturalness are the antitheses of all things mechanical and "hi-fi." I believe that they are among the best speakers available today, at any price. The planar-magnetic, flat-panel .7s do what stand-mounted box speakers don't: They move copious amounts of air. Each speaker has 400 square inches of driving surface—eight times more than an 8" woofer, and more than 16 times as much as a 5.5" mid/woofer like the one in KEF's LS50. Moving that much air energizes a small room like mine in a way that lets me really feel the sound. Bass may not go very low, but it's present in the room with me, touching me physically. Little boxes can give the idea of bass—a simulacrum—but never bass that touches your skin. The Magnepan sound is always more tactile, more of the senses, than what I experience with little box speakers, whose sound is always more of the mind.

When I used the Moon and the Maggies to listen to my swamp-blues buddy Slim Harpo sing "I'm a King Bee" and "Rainin' in My Heart," from his first album, Slim Harpo Sings "Raining in My Heart . . ." (LP, Excello LP-8003), my room felt awash with rich, pulsing molecules of bass and midrange energy. The high frequencies were vaporous, but precise and wonderful. The Simaudio's apparent speed and transparency tamed the Magnepans' inherent sweetness to the point where the .7s began to sound like the high-resolution transducers they are. The reverb added to Harpo's seductive voice in this 1961 recording had an enticing presence of its own. Music emerged with such clarity and ease that I became relaxed and happy. This deeply satisfying amp-speaker pairing reproduced all types of music with charm and authority.

With speakers: Technics SB-C700

The fast, neutral sound of the Moon Neo 340i was enhanced by the low-distortion naturalness of Technics' SB-C700 stand-mounted minimonitors that I reviewed in January. I played Claude Debussy playing Claude Debussy, with soprano Mary Garden, from Claude Debussy: The Composer as Pianist: 18 selections recorded for M. Welte & Sons in Paris, in 1904 and 1913 (CD, Pierian 0001). I have revered this disc, and Debussy's unusual pianism, ever since its release, in 2000. The Moon and Technics have now made it my new religion.

This supremely crafted Welte-Mignon piano-roll recording was made using a finely tuned and restored Feurich-Welte piano playing laboriously rerecorded rolls from the collection of Dick and Helena Simonton, recorded in stereo using two Neumann KM 83 microphones. The results of all this love and labor are a stupefyingly real AAD recording that appears to capture every nuance of the French master's touch, pedaling, and expression. Debussy's deliberateness, hesitancy, and eccentric tempos in his La cathédrale engloutie seem more flesh-and-blood soulful than most pianists now living can muster on their best day at the keyboard. The Welte-Mignon recording piano even captured Debussy's half-pedaling!

This was another deeply satisfying combination of amplifier and speakers.

Vicissitudes of Power

The aspect of recorded music that is most affected by preamplifiers and power amplifiers is its viscosity—ie, how thick or thin or transparent the music sounds. This in turn affects grain, contrast structure, and, especially, musical flow. The perceived viscosity or plasticity of an audio amplifier's sound lies typically in its internal impedances, time constants, bandwidth, and voltage plus current capabilities. Musical viscosity also depends on the designer's choice of resistors, capacitors, regulators, and transformers.I mention all this because it sounded to me that the Simaudio design team has made some sophisticated viscosity-oriented design choices that have resulted in audio products, like the Moon Neo 340i, of unique transparency and fluidity.

Description: Solid-state integrated amplifier. Analog inputs: 1 XLR, 4 RCA, Analog outputs: fixed, variable (both RCA). 1 pair speaker outputs. Headphone output: 0.25" phone plug. Rated output power: 100Wpc into 8 ohms (20dBW), 200Wpc into 4 ohms (17dBW).

Dimensions: 16.7" (429mm) W by 3.5" (89mm) H by 14.7" (376mm) D. Shipping weight: 28.6 lbs (13kg).

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