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無帰還 · No Feedback
One channel per box.
Sold that way on purpose.
The Soulnote M-3 is a monaural power amplifier built around a single job: drive your speakers, channel by channel, with nothing in the way.
Soulnote M-3 Monaural Power Amplifier (Each)
Popular upgrades
Pairs well with
Hand-built in Japan. Every part chosen by ear.
Soulnote M-3 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 4 ohms — completely non-NFB power from a single push-pull output stage.
direct mechanical grounding — vibration drained straight to your rack, not the chassis.
ultra-low-loss toroidal transformer with high-speed SiC rectifier diodes.
Technical specifications
| Type | Monaural power amplifier, non-NFB (sold individually) |
| Power output | 160 W (4 ohms) |
| Output stage | Single push-pull, can-type transistors, four-stage Darlington |
| THD | 0.1% (1 W) |
| Input | XLR (1 V / 25 kΩ) |
| Transformer | 1600 VA ultra-low-loss non-epoxy toroidal; SiC diodes |
| Isolation | Six-spike system (three per unit) |
| Dimensions | 340 × 251 × 512 mm |
| Weight | 31 kg each |
Is the M-3 sold as a pair?
What does it need in front of it?
How does the M-3 differ from the M-3X?
About the Soulnote M-3 Monaural Power Amplifier (Each)
Availability: Ships in 10–15 business days.
One Amplifier, One Channel, No Feedback: Soulnote M-3
The Soulnote M-3 is a monaural power amplifier built to the company's uncompromising, completely non-NFB philosophy — one chassis, one channel, and nothing in the signal path that doesn't need to be there. Sold individually so you can build a true dual-mono system, each M-3 delivers 160 watts into 4 ohms with the vivid, spatial, blur-free sound that has made Soulnote a name whispered among serious listeners. Priced per unit; two are required for stereo.
Purist Power, Industrial Muscle
A non-NFB single push-pull output stage uses industrial-grade can-type transistors in a four-stage Darlington configuration for low distortion and effortless drive, fed by an enormous ultra-low-loss 1600 VA non-epoxy-filled toroidal transformer and high-speed SiC rectifier diodes. Type-R non-NFB differential circuits handle voltage amplification, and copper-plate heat sinks — integrated with the bus bars and physically isolated from the chassis — keep everything cool and quiet. A six-spike isolation system grounds the whole thing directly to your rack.
Built to Disappear
With just an XLR input and speaker terminals — no selectors, no microcontrollers — the M-3 is single-minded about one job. At 31 kg per unit it's a statement of intent, engineered so the amplifier itself gets out of the way and lets the music through.
Why You'll Love the Soulnote M-3
- True monoblock — one amplifier per channel for maximum separation (sold each)
- 160 W into 4 ohms — completely non-NFB power
- Industrial can-type output transistors — single push-pull, four-stage Darlington
- 1600 VA toroidal transformer — ultra-low-loss, with SiC diodes
- Copper bus-bar heat sinks — isolated from the chassis for lower noise
- Six-spike isolation — direct mechanical grounding
- Hand-built in Japan — Premium Silver or Premium Black, 31 kg each
Frequently Asked Questions
Is the M-3 sold as a pair?
No — each M-3 is a single monaural amplifier, sold individually. You'll need two to make a stereo system (one per channel). This lets you buy a matched pair for true dual-mono operation.
What preamplifier or source does it need?
Any preamplifier, or a DAC/preamp such as the Soulnote D-3, connected via its XLR input.
How is the M-3 different from the M-3X?
The M-3X doubles the current-delivery capacity of the M-3 for even greater grip and drive (240 W into 2.7 ohms). The M-3 is the standard monoblock; the M-3X is the higher-current version.
Soulnote M-3 Technical Specifications
| Type | Monaural power amplifier, non-NFB (sold individually) |
| Power output | 160 W (4 ohms) |
| Output stage | Single push-pull, can-type transistors, four-stage Darlington |
| THD | 0.1% (1 W) |
| Input | XLR (1 V / 25 kΩ) |
| Transformer | 1600 VA ultra-low-loss non-epoxy toroidal; SiC diodes |
| Isolation | Six-spike system (three per unit) |
| Dimensions (W × H × D) | 340 × 251 × 512 mm |
| Weight | 31 kg each |
| Finishes | Premium Silver or Premium Black |
| Made in | Japan — Soulnote |