Fosi Audio MC331 | Desktop DAC, Tube Amp, and Preamp

The Fosi MC331 is a Versatile All-in-One DAC/Amp That Blends Warm, Rich Tube Sound With Seamless Source Switching For an Effortless Hi-Fi Experience

• A DAC, tube amplifier, and preamplifier with Bluetooth integration
• Features one analog and four digital input modes for wide compatibility
• VU meter and vacuum tubes add warm sound and a nostalgic feel
• Replaceable tube design for customizable sound signature

All-in-One Design

The MC331 is a 2.0 channel integrated amplifier with vacuum tubes and a built-in DAC. It can play the roles as a DAC, preamp, and amplifier simultaneously in an audio system to meet various needs in one single device. The MC331 supports one analog and four digital input modes, ensuring compatibility with a broad range of audio sources. It also boasts a pre-out port, facilitating easy setup of a 2.1 system.

Vacuum Tubes

As an integrated tube DAC/amp, the MC331 combines modern function with retro charm. The glowing 5654W vacuum tubes and VU meter add a warm, nostalgic aesthetic while also enriching the sound with smooth, analog character. The included 5725W tubes enhance musical warmth and depth and can be easily swapped with other 7-pin tubes to suit your preferences. For added safety, the unit comes with two protective tube covers to prevent accidental burns during operation.

Setup Flexibility

The MC331 features Bluetooth, USB, coaxial, optical, and RCA inputs for broad compatibility with sources like computers, phones, CD players, and turntables with built-in phono preamps. Flexible output options include speaker terminals, a 3.5mm pre-out, and a 3.5mm headphone jack, making it easy to build and customize your ideal audio setup.

Compact, Yet Powerful

The MC331 only takes up minimal desktop space but boasts a maximum power output of 105Wx2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough.

Retro Style, Modern Simplicity

The MC331 adds nostalgic features including the VU meter and the vacuum tubes. The VU meter pointer dances to the rhythm of the music, which shows signal strength in real-time. The replaceable tube design allows you to customize the sound signature to suit your personal preferences.

The MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. All features can be operated either via the front panel or the remote control, including: power on/off, mute/unmute, play/pause, next/previous track, volume adjustment, input mode selection, Bluetooth pairing reset, and bass/treble controls.