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Description
🎧 Fosi Audio MC331 – 2.1 Channel Tube Integrated Bluetooth Amplifier with DAC & VU Meter
Retro Charm, Modern Versatility.
Experience the perfect fusion of nostalgic aesthetics and modern audio performance with the Fosi Audio MC331. This hybrid tube integrated amplifier combines the rich warmth of JAN 5654W vacuum tubes with an all-in-one design featuring a built-in DAC, Bluetooth connectivity, and a classic VU meter that moves with your music.
Whether you're an audiophile seeking tube warmth or a casual listener who loves convenience, the MC331 offers immersive sound in a space-saving format that fits beautifully into any desktop or home setup.
🔊 Key Features:
🎵 Hybrid Tube Amplification with Built-in DAC
Enjoy rich, lifelike sound from your favorite sources thanks to premium JAN 5654W tubes and a powerful digital-to-analog converter. Compatible with various 7-pin tube types to tailor your sound signature.
📡 Multiple Inputs, Maximum Compatibility
Connect effortlessly with Bluetooth, USB, Optical, Coaxial, and RCA inputs. Switch seamlessly between devices like PCs, phones, turntables (with phono preamp), and CD players.
🎚️ VU Meter & Vintage Aesthetic
The moving needle VU meter isn’t just for show—it provides real-time signal feedback while adding visual flair. Paired with glowing vacuum tubes, it brings timeless analog character to your modern setup.
🎧 Headphone Amp & 2.1 Pre-Out Support
Use the 3.5mm headphone output for private listening or connect a subwoofer via the pre-out for a full 2.1-channel system. Drives bookshelf speakers effortlessly with 105W x 2 @ 4Ω output.
🛋️ Remote-Controlled Convenience
Control bass, treble, volume, and input source without leaving your seat. The memory function ensures your settings are saved on every restart.
💼 Compact CNC Aluminum Design
Built with a finely sandblasted, all-metal chassis, the MC331 offers durability and premium feel, all in a compact footprint.
📦 Technical Specifications:
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Inputs: RCA, Bluetooth (SBC/AAC), USB, Optical, Coaxial
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Outputs: Passive Speaker Terminals, 3.5mm Headphone Out, Pre-Out
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SNR: ≥100dB | THD: ≤0.03%
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Tube Type: JAN 5654W (replaceable with EF95, 6J1, WE-403A, etc.)
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Power Output: 105W x 2 @ 4Ω
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Control: Physical knobs + remote control
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Dimensions: Compact, desktop-friendly form factor
🔌 Why Choose the Fosi Audio MC331?
For audiophiles who appreciate the nostalgic touch of tubes but demand modern digital flexibility, the MC331 delivers on all fronts: impeccable sound, classic design, and unmatched connectivity.
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Let customers speak for us
They sound just amazing, I would say that the app a little rough to use. I can vouch they sound amazing. better than most of the tws which are out there in the market. Also, the Online dsp, gives a little edge it you want to tune them, and you can also upload your on DSP. Overall at this price point, It' a 10 on 10 deal.
This is a compact amp that has a clear sound output which can be described as slightly warm. Vocals are clear and midst nice. Works straight out of the box. Balanced xlr input is a big plus. Overall it is good value for the price. Will recommend it to everyone
Really a great product for the price offered using thebuds for the first time and it has exceeded my expectations. The sound is more balancednot a thumping bass but withclear vocals, treble and and a surrounding bass. Also there's someissue in connectivity which I faced at firstbut saw a tutorialon resolving the issue online.
everything is great but would have been even better if it had a mic
Awesome case, providing safety
It’s simply great upgrade from KZ. best output at best price
Had received in a day itself and it’s all that I had expected and more.
Very good sound and bass . Clear vocal and instruments
Fosi GR70 is an efficient amp and works well as a preamp as well as a headphone amp. It drives my hd600 excellently.
Amazing quality
Ordered 5 units and all were awesome
Thank you so much
Great part is that it got delivered very next day
I’m genuinely impressed. The sound quality is exceptional—crisp highs, clear mids, and a bass response that’s just right. It doesn’t overpower the mids or muddy the overall sound, which is a rare balance to strike in this price range.
🎧 Sound Signature: Tuned to the Harman Target with a tasteful bass boost. It adds warmth without sacrificing clarity, making it perfect for everything from vocals to electronic music.
🔊 Bass: Not too high, not too low—just enough to give depth without distortion. It complements the mids beautifully.
🛠️ Build Quality: Solid and premium-feeling. The fit is comfortable for long sessions, and the mic is a handy addition for calls or gaming.
Overall, it’s a fantastic value for the price. If you’re looking for an IEM that delivers refined audio with a touch of bass and excellent build quality, this one’s a winner.
Best among its price range. I think it's best value for money till 15k. And best overall sound quality under 10k. It's complete package. This is my first purchase before this, I used Sony WF-1000XM4 earbuds. This is gonna kill to its value for that impressive sound quality.
Good quality eartips. They are very comfortable!
"Amazing sound quality with clear vocals and deep bass. Very comfortable for long listening, and the build feels solid. Bought from The Audio Store – trusted, genuine, with GST billing. Easily the best choice in this price range!"
Great product. Great packaging in delivery
