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FOSI AUDIO MC331 Integrated Amplifier
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Accessories for this product
Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.
Fosi Audio MC331 Tubes Integrated Amplifier JAN5654W Bluetooth 5.0 2x105W 4 Ohm
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: Bluetooth 5.0
The Fosi Audio MC331 features Bluetooth 5.0 functionality to ensure reliable, stable reception of an audio signal. It supports AAC and SBC codecs.
Fosi Audio MC331: Retro look and tone control
The Fosi Audio MC331 features an attractive round vumeter on its front panel, as well as two transparent glass tube covers contributing to the retro look of the Fosi MC331. In addition, 3 potentiometers on the front panel control volume, bass and treble tones to fine-tune the final sound.
Fosi Audio MC331 overview
| 1 | Vumeter |
| 2 | Input LED indicator |
| 3 | IR receiver |
| 4 | 3.5mm headphone output |
| 5 | Tube protection |
| 6 | JAN 5654W tubes |
| 7 | Treble adjustment potentiometer |
| 8 | Bass adjustment potentiometer |
| 9 | Volume potentiometer |
| 10 | USB-C input |
| 11 | Bluetooth antenna |
| 12 | Toslink optical input |
| 13 | SPDIF coaxial input |
| 14 | RCA input |
| 15 | Speaker terminal output |
| 16 | Pre-out jack 3.5mm |
| 17 | 19V-24V DC power supply via DC jack |
Caractéristiques techniques
| Specifications | |
|---|---|
| Product type | Integrated tube amplifier |
| Channel | Stereo |
| Tubes | 2x JAN5654W |
| Amplification chip | TI TPA3221 |
| Inputs | 1x USB-C 1x Optical Toslink 1x Coaxial 1x RCA stereo Bluetooth |
| Outputs | 1x Speaker terminal output 1x Pre-out jack 3.5mm 1x Jack 3.5mm headphone output |
| Output power | 2x105W @ 4 ohm |
| THD | ≤ 0.03% |
| SNR | ≥ 100dB |
| Terminaison impedance | 4-8 Ohm |
| Frequency response | 20Hz–20kHz (±1 dB) |
| Supported sample rates | USB: PCM up to 24bit 96Khz Optical Toslink / Coaxial: PCM up to 24bit 96kHz |
| Bluetooth version | 5.0 |
| Supported Bluetooth codecs | SBC, AAC |
| Bluetooth range | 10m |
| Volume control | |
| Tone control | Bass and treble |
| Vumeters | |
| IR remote | |
| General | |
|---|---|
| Power supply | 19V-24V DC via jack DC |
| Dimensions | 135 x 135 x 50mm (without tubes) |
| Package | 1x Fosi Audio MC331 2x Tubes JAN5654W (GE5654) 1x Bluetooth antenna 1x IR remote control 1x 24V 4.5A power adapter |
| Input | USB |
| Input | SPDIF |
| Input | Bluetooth |
| Input | RCA |
| Input | Optical |
| Output | Jack 3.5mm |
| Output | Speaker terminal |
| Color | Black |
| Channel | 2 (Stereo) |
| Class | N/A |
| Amplifier chip | TPA3221 |
| Amplifier chip | Tube |
| Power (W) | 105.0 |
| Remote Control | Yes |
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