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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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OUR HONEST REVIEWS FROM THE CO-FOUNDERS & AUDIOPHILES
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TRUSTED BY OVER 45K+ MUSIC ENTHUSIASTS
Let customers speak for us
It is the best and clean sounding IEM, perfect for the Beginner.
I love the fact that I can change the nozzle and its a little different sounding, so its two in one.
The cable quality is out of the world no external sound when I touch it.
I can hear so many details clearly. I say please go for this, it is perfect first IEM and the Perfect Upgrade if you had IEM under 2k before
It provides Awesome sound quality go and buy it m
🎧 KZ Castor Pro IEM – Review
🔊 Sound Quality
The KZ Castor Pro delivers clear and detailed sound with excellent separation across lows, mids, and highs. The decent thumping bass is tight and controlled, giving energy to tracks without overwhelming the vocals or instruments. Its super-balanced tuning ensures a natural, enjoyable listening experience suitable for all genres.
🎚 Unique DIP Switch Equalizer
What sets the Castor Pro apart is its DIP switch physical equalizer. With up to 16 different tuning options, it allows listeners to adjust the sound profile on the go—boosting bass, enhancing treble, or keeping it neutral. This feature gives it a level of flexibility rarely seen in IEMs at this price point.
🔇 Noise Isolation
Although it lacks active noise cancellation, the design offers an excellent passive seal. The snug fit ensures that outside noise is effectively blocked, making the listening experience immersive and ensuring ANC doesn’t feel like a missing feature.
🎼 Hi-Res & DAC Performance
For those using Hi-Res lossless audio, pairing the Castor Pro with a DAC is highly recommended. The extra power and clarity from a DAC enhance the already impressive soundstage, detail retrieval, and overall dynamics, making the listening experience truly premium.
💰 Value for Money
At its smart price, the KZ Castor Pro punches well above its weight. It combines detailed sound, punchy bass, balanced tuning, and innovative features—making it a strong choice for both audiophiles on a budget and everyday music lovers.
Have been using these buds for like an year now, they gave me a great time all that while, only recently the cable started getting green and there was an issue with audio drop on even a slight movement (like every earphone ever), but still a great investment for an year.
Got this as my first iem from audio store.. much much more worth than the price.. the bass!!.. my gawddd, it's something which is gonna surprise you.. I got it paired with the moondrop echo a dac.. and trust me, couldn't have asked for anything better.. and the delivery was done to me in kolkata, just within a day.. remarkable job audio store!♥️
Loved the new gear they sound absolutely phenomenal and mind if say the looks and aesthetic of the KZ Castor Pro is underrated for its price, as a newbie I was a little hesitant to jump in this rabbit hole, but it was worth it. Shoutout to The Audio Store to build up my courage, they were very helpful as I was placing my order I fumbled and they responded very positively and helped me correct my mistake. Thank You
Excellent performance with ANC good mic this song is like heaven
It is better compared to normal tws
Perfect for beginners to start their audiofile journey
I'm satisfied and convinced of this product
The packaging
The quality
And The performance
Trust he go for this one if you never try this one
Just give it a try you will not regret it
I have manny IEM's I'm my collection
But this one is really fantastic
Thanks to The Audio Store
They have many discount in compar to others in market
And shippment is on the time no worrys
1999 is nothing the engineering is perfect of this IEM,,,
Amzing product
Love the way it sounds rich in every range perfect for beginners but if you're not a bass head go for non bass varient.
This is my first ever IEM that I purchased after research of couple of months. And I can say that this was a good decision on my end. Cable is good. Buds look stylish. Comes with a small carry pouch and 6 pairs of ear tips. Sound quality is awesome. Love the instrument separation. Customisable EQ gives them versatility. You can actually experience how other IEM sound just be playing around with the EQ.
Actually, l'm new to this IEM world. Such an amazing product. If you are new to iem just as me, I would highly recommend his product to try out. The OG. There are 16 types of tuning options to play around and explore your favourite music in a new way and the build quality is also pretty good. Overall a nice product 👍.
Good sound
5/5 Mids and Highs
5/5 Well balanced Bass, doesn't overpower the music
5/5 Design look premium and classy
They are quiet heavy and huge
