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Twice the current.
One job, still.
The Soulnote M-3X is a monaural power amplifier built to do one thing — drive your speakers — with double the grip of the amplifier it replaces.
Soulnote M-3X Monaural Power Amplifier (Each)
Popular upgrades
Pairs well with
Hand-built in Japan. Every part chosen by ear.
Soulnote M-3X Monaural Power Amplifier (Each)
無 Nothing in the way
Everyone adds.
Soulnote subtracts.
The best producers know the secret: the art is what you leave out. Soulnote engineers the same way — every stage a conventional design adds to the signal path is a chance to blur the original waveform, so Soulnote removes them, one by one, and tunes what remains by ear.
Between input and output: 4 extra stages, each with a fingerprint. Between input and output: almost nothing.
Every stage does a job — and leaves a fingerprint on the waveform as it passes through.
Fewer hands on the signal. What remains was chosen by listening — part by part.
Designed by subtraction
Less circuit.
More music.
into 2.7 ohms — double the M-3's current delivery, for total control of difficult speakers.
is all the voltage-amplification stage uses — every other part removed could only blur the signal.
ultra-low-loss toroidal transformer, mounted vertically on titanium washers.
Technical specifications
| Type | Monaural power amplifier, non-NFB (sold individually) |
| Power output | 240 W (2.7 ohms) |
| THD | 0.1% (1 W) |
| Frequency response | 2 Hz – 200 kHz (±1 dB) |
| Voltage amp | New Type-R non-NFB differential (4 transistors, 10 resistors) |
| Transformer | 1600 VA ultra-low-loss non-epoxy toroidal, titanium-mounted |
| Dimensions | 340 × 257 × 512 mm |
| Weight | 31 kg each |
| Finishes | Premium Silver or Premium Black |
Is the M-3X sold as a pair?
How does it differ from the M-3?
What is in the voltage-amplification stage?
About the Soulnote M-3X Monaural Power Amplifier (Each)
Availability: Ships in 10–15 business days.
Double the Current, Same Purist Soul: Soulnote M-3X
The Soulnote M-3X is the higher-current evolution of Soulnote's M-3 monoblock — a completely non-NFB monaural power amplifier that, in the company's words, "doubled the current delivery capacity without compromising spatial expression or penetrating power." Sold individually for true dual-mono systems, each M-3X delivers 240 watts into 2.7 ohms with the grip to command even the most demanding loudspeakers, while keeping Soulnote's signature vivid, three-dimensional presentation intact. Priced per unit; two are required for stereo.
Minimalism as Engineering
The voltage-amplification stage uses Soulnote's new Type-R non-NFB differential circuits built from the barest possible parts count — just four bipolar transistors and ten resistors — because every component removed is a component that can't smear the signal. Precision-paired output transistors, matched using a newly developed method, deliver "blur-free parallel push-pull" performance. An ultra-low-loss 1600 VA non-epoxy toroidal transformer is mounted vertically on titanium washers, and the amplifier does one thing only: a single XLR input and speaker terminals, with no selectors or microcontrollers to get in the way.
Why You'll Love the Soulnote M-3X
- Doubled current delivery vs the M-3 — 240 W into 2.7 ohms of iron grip
- True monoblock — one amplifier per channel (sold each)
- Minimalist non-NFB Type-R — just 4 transistors and 10 resistors in voltage amp
- Precision-paired push-pull — newly developed matching for blur-free output
- 1600 VA toroidal on titanium — ultra-low-loss, vertically mounted
- Single-function purity — one XLR input, speaker terminals, nothing else
- Hand-built in Japan — Premium Silver or Premium Black, 31 kg each
Frequently Asked Questions
Is the M-3X sold as a pair?
No — each M-3X is a single monaural amplifier sold individually. Two are required for a stereo system, giving you a true dual-mono pair.
How does the M-3X differ from the M-3?
The M-3X roughly doubles the M-3's current-delivery capacity (240 W into 2.7 ohms vs 160 W into 4 ohms), for greater control of difficult, low-impedance speakers — without sacrificing the spatial, penetrating Soulnote sound.
What does it need to run?
A preamplifier or DAC-preamp (such as the Soulnote D-3) connected to its single XLR input.
Soulnote M-3X Technical Specifications
| Type | Monaural power amplifier, non-NFB (sold individually) |
| Power output | 240 W (2.7 ohms) |
| THD | 0.1% (1 W) |
| Frequency response | 2 Hz – 200 kHz (±1 dB) |
| Gain | 22 dB |
| Input sensitivity / impedance | 2 V / 25 kΩ (XLR) |
| Voltage amp | New Type-R non-NFB differential (4 transistors, 10 resistors) |
| Transformer | 1600 VA ultra-low-loss non-epoxy toroidal, titanium-mounted |
| Dimensions (W × H × D) | 340 × 257 × 512 mm |
| Weight | 31 kg each |
| Finishes | Premium Silver or Premium Black |
| Made in | Japan — Soulnote |