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s.m.s.l SA400
Stereo Power Amplifier
Use two sta516be digital power amplifier chips, output 230W per channel at 4 ohm,easy to drive most speakers.
Using NJRC's electronic volume control chip NJW1195 from Japan, precise volume control and low distortion.
super bass preamp output for connecting active subwoofers to form a 2.1 audio system,-30 ~ +10dB adjustment range.
Built-in multiple EQ modes and treble / bass adjustment for easy matching of a variety of speakers and music.
Qualcomm Bluetooth 5.0 receiver, suport APTX, better sound quality, longer transmission distance.
All aluminum alloy CNC precision processing shell, anodizing technology and chamfering process, exquisite workmanship and delicate touch.
Using color LCD screen and newly developed user interface, full-function remote control.
High quality gold-plated input and output terminals.
Perfect protection circuit for overheating, overcurrent, etc.
High quality power specially designed for audio.
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Professional Reviews 91/100
Deliciously Crispy
Sound Quality
93/100
Build Quality
88/100
Value for Money
89/100
The SA400 delivers explosive dynamics, iron-fisted bass control and a remarkably clean, spacious Class D presentation from a compact chassis. Soundnews praised its immense headroom and fast transient grip, while Cheap Audio Man highlighted its airy separation and convincing three-dimensionality. EQ, tone controls and variable sub output make this a powerful, adaptable hub for demanding speakers.
What Reviewers Are Saying
Pros
Exceptional headroom, fast transients and authoritative control make it capable of driving demanding and low-sensitivity speakers with ease.
Deep, hard-hitting bass remains tight, fast and controlled, with SDB mode adding extra punch.
Clean, transparent sound with generous air, separation and wide spatial presentation.
Useful EQ and tone controls, selectable gain, and adjustable subwoofer output offer unusually flexible system tailoring.
&
Cons
Direct mode can sound lean or emotionally restrained through the midrange; EQ or tone adjustment is beneficial for fuller vocals and acoustic instruments.
It runs warm under use and needs open, well-ventilated placement; the cooling fan can be audible when it engages.
Some systems may reveal faint power-supply coil noise or low-level hiss through very sensitive tweeters.
SOUND QUALITY PERFORMANCE 93/100
Reviewers found the SA400 unusually clean, spacious and highly controlled for a compact Class D amplifier. Its standout qualities are forceful bass, rapid transients and strong separation, although its direct-mode midrange can sound somewhat lean without tonal adjustment.
Transparency Resolution
94/100
Soundnews describes a clean, detailed, open presentation with a transparent, airy and well-defined top end that remains comfortable over long sessions. Tharbamar likewise heard a quiet, neutral and refined sound, with clean vocals and strong definition.
Tonal Balance Musicality
88/100
The overall balance is described as neutral, clean and free of obvious treble harshness, while the EQ and tone controls offer useful tailoring. Soundnews found the direct-mode midrange linear to the point of sounding thin and emotionally restrained on voices and acoustic instruments, though modest midrange lift or SDB mode added welcome body and naturalness.
Dynamics
96/100
This is the SA400's most consistently celebrated strength. Reviewers report very fast attack and recovery, abundant headroom, exceptional bass grip and effortless control of demanding bass passages, low-sensitivity bookshelf speakers and larger multi-driver designs.
Soundstage Imaging
93/100
Soundnews praises the amplifier's ability to separate notes, add air and define image outlines, calling its staging close to outstanding for the money. Cheap Audio Man also heard notably improved air, layering, reverb clarity and three-dimensionality over less expensive Class D alternatives; Tharbamar only noted that depth can become shallower at very high levels.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
88/100
Soundnews found the metal chassis substantial, carefully finished and neatly executed, with attention to small details. The onboard EQ, tone controls, gain settings and subwoofer output add practical flexibility, but Cheap Audio Man found the volume knob somewhat flimsy, and reviewers advise open placement because the amplifier can run warm under hard use.
Value for Money
89/100
At roughly $629-$660, Soundnews calls the SA400 fairly priced and a very good value given its power, facilities and sonic performance, while Tharbamar also considers its price-to-performance impressive. Cheap Audio Man felt it sounded worthy of its asking price but noted that shoppers have more competing options at $650 than they would at a lower price.
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Authorized dealers for s.m.s.l SA400
- Addicted to Audio — online and in-store — Epping, Victoria, Australia (website)
- Apos Audio — online and in-store — Oakland, California, United States (website)
- Audio 46 — online and in-store — New York, New York, United States (website)
- Audio Hum — in-store — Norte Sierra, Andalucía, Spain (website)
- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
- AUDIOPHONICS — in-store — Bordeaux, Nouvelle-Aquitaine, France (website)
- Bloom Audio — online and in-store — Gibbsboro, New Jersey, United States (website)
- Elise Audio — online and in-store — Paddington, England, United Kingdom (website)
- Headphone Zone — online and in-store — Laxmi Industrial Estate, Maharashtra, India (website)
- Hifi Passion — in-store — Neustadt, Bremen, Germany (website)
and 4 more verified dealers