Fosi Audio MC331 Tube Integrated Amplifier DAC

 129,00 Incl. Vat

✅ 2 years standard warranty

✅ Free return within 14 days

✅ Orders before 17:00 → shipped today

🟢 On stock

2 in stock|Delivery time: Order before 17:00h, shipped today mo-fr

SKU: FOSI-mc331 Categories: , ,
Description

The Fosi Audio MC331 is a powerful little hybrid integrated amplifier based on JAN5654W tubes and a TI TPA3221 chip. This little jewel blends modern and vintage technology, and is capable of delivering up to 2x105W of power under 4 ohm, enough to soundtrack a beautiful space.

In addition to its RCA input, it features numerous digital inputs (USB-C, Toslink optical, coaxial SPDIF), as well as Bluetooth 5.0 functionality for reliable, stable wireless transmission thanks to a proprietary DAC/Bluetooth chip. There’s also a 3.5mm pre-out jack for coupling to an active subwoofer, and a 3.5mm headphone output on the front panel.

Highly versatile and elegant, Fosi Audio has given its MC331 amplifier a stylish appearance, with a round vumeter and transparent glass tube protectors. The user experience is further enhanced by an infrared remote control.

Fosi Audio MC331: JAN5654W tube preamplifier & TPA3221 TI amplifier

The MC331 combines a pair of JAN 5654W tubes and a TI TPA3221 chip to deliver warm, powerful sound with 2x105W output power at 4 ohms. This amplifier is therefore capable of providing a considerable amount of sound, coupled with suitable speakers. What’s more, its 3.5mm pre-out jack output makes it easy to set up a 2.1-channel system with an active subwoofer. JAN 5654W tubes are interchangeable with many other models: 6AK5, 6AK5W, 6Zh1P, 6J1, 6J1P, WE-403A, 403B, EF95 and many other 7-pin tubes. This makes it possible to achieve the desired sound coloration.

 

Fosi Audio MC331: headphone amplification function

Thanks to its 3.5mm jack output, the Fosi Audio MC331 can drive headphones or IEMs with impedances ranging from 32 to 300 ohms. Extremely practical when placed on your desk, for example.

Fosi Audio MC331: JAN5654W tube preamplifier & TPA3221 TI amplifier

The MC331 combines a pair of JAN 5654W tubes and a TI TPA3221 chip to deliver warm, powerful sound with 2x105W output power at 4 ohms. This amplifier is therefore capable of providing a considerable amount of sound, coupled with suitable speakers. What's more, its 3.5mm pre-out jack output makes it easy to set up a 2.1-channel system with an active subwoofer. JAN 5654W tubes are interchangeable with many other models: 6AK5, 6AK5W, 6Zh1P, 6J1, 6J1P, WE-403A, 403B, EF95 and many other 7-pin tubes. This makes it possible to achieve the desired sound coloration.

Specifications
Product typeIntegrated tube amplifier
ChannelStereo
Tubes2x JAN5654W
Amplification chipTI TPA3221
Inputs1x USB-C
1x Optical Toslink
1x Coaxial
1x RCA stereo
Bluetooth
Outputs1x Speaker terminal output
1x Pre-out jack 3.5mm
1x Jack 3.5mm headphone output
Output power2x105W @ 4 ohm
THD≤ 0.03%
SNR≥ 100dB
Terminaison impedance4-8 Ohm
Frequency response20Hz–20kHz (±1 dB)
Supported sample ratesUSB: PCM up to 24bit 96Khz
Optical Toslink / Coaxial: PCM up to 24bit 96kHz
Bluetooth version5.0
Supported Bluetooth codecsSBC, AAC
Bluetooth range10m
Volume control 
Tone controlBass and treble
Vumeters 
IR remote 
General
Power supply19V-24V DC via jack DC
Dimensions135 x 135 x 50mm (without tubes)
Package1x Fosi Audio MC331
2x Tubes JAN5654W (GE5654)
1x Bluetooth antenna
1x IR remote control
1x 24V 4.5A power adapter
Shipping and Delivery
FAQ returns hifimastery

Shipping - Made easy with DPD, DHL and your National shipping company

We deliver your Hifimastery order as quickly as possible via DPD, DHL, or PostNL (your country’s national postal service). You choose your preferred carrier at checkout. All shipments are insured and tracked, so we handle any loss or damage.

Shipping Costs:

  • Netherlands & Belgium: Free shipping on orders over €50; 
  • Other European countries: Free shipping on orders over €100–€200 (depending on country, always visible in checkout before payment).
    The higher the order amount the lower the shipping costs until the free shipping amount is reached, which is fair...

Order Shipping Times:

  • Orders placed before 17:00h and in stock ship the same day monday-friday;
  • In case a product has a longer delivery time than this is mentioned at the stock status!!! 

You choose we follow:

You can choose in the checkout what shipping company you want us to use for shipping your order. Sometimes due to longer delivery times etc, we can choose another reliable partner based on your order. 

Track & Trace

We know you’re eager to enjoy your order—and we completely understand! Once your order has been shipped via an external carrier, you’ll receive an email from us containing a tracking number or a direct link to the carrier’s tracking page. This lets you see exactly when your order is expected to arrive.

If your order is delivered to a pickup point due to your absence, you’ll be notified either through the tracking information or via services provided by the carrier.

Returns
FAQ returns hifimastery

Returns & Right of withdrawal – We keep it simple

Not satisfied with your purchase? No worries! Returning items is simple and stress-free.

✨ Key Highlights:

  • No reason needed – return “just because”
  • 14-day reflection period – from delivery date and within 14 days later you can decide to keep it or not...
  • Fast inspection – returns inspected within a few days most of time 5 days (max 14);
  • refund will be done mostly same day after inspection is done.

Return Conditions:

Items are undamaged and clean.

  • All accessories included (also manual etc);
  • Original packaging;
  • Pack items securely for safe return;
  • Sealed products remain unopened (applies to fragile or hygiene-sensitive items, e.g., turntable styli, in-ear earbuds).

For furniture, always choose Option 2.

Option 1 – Return Label:

  • Use our return portal to print a return DPD shippinglabel;
  • Coverage is up to €500 via DPD (other carriers not insured);
  • Returns are at the customer’s risk and expense (if you need more insurance value contact us so we can check for higher insurance or choose option 2)

Option 2 – Own Carrier:

  • Arrange return with a carrier of your choice;
  • Email us: “Return: order number …” to receive a return form to include in your package;
  • Return requested more than 2 weeks after delivery day cannot be processed and declined.

Timeframe:

  • You have 14 days to request a return calculated from the day the package was delivered to you;
  • The package must be received in our warehouse within 2 weeks after your request to return the product.

Exchange product:

  • Place a new order for the desired product;
  • Original order must be returned and will be refunded (minus any return costs);
  • Refunds processed via the original payment method within 2 weeks.