







Fosi Audio MC331 Tube Integrated Bluetooth Amp
Features
- All-in-One DAC Amp/Headphone Amp
- Replace vacuum tubes 6AK5, 6AK5W, 6Zh1P, 6J1
- Mini VU Meter: Classic Retro Vibe
Pairs well with
Fast, Free Shipping!
24 Months Warranty
30-Day Money-BackGuarantee
Lifetime Customer Support

Fosi Audio MC331 Tube Integrated Bluetooth Amp
If you have any questions, please refer here: FAQs
-
Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
-
Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
Mon-Fri: 3:00 AM - 3:00 PM PST -
FAQ’s
If you have any questions, please refer here: FAQs
Review Videos

All-in-One DAC Amp/Headphone Amp
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. The VU meter and vacuum tubes add a touch of retro flair, delighting audio enthusiasts with both visual and auditory pleasure.
- Input: RCA, Bluetooth, USB, Optical, Coaxial
- Output: Passive Speakers Output, Pre-Out, 3.5mm Headphone
- OutputSNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC, AAC
Product details
Description
-
All-in-One DAC Amp: A DAC, amplifier, preamplifier, and headphone amplifier are all integrated into the Fosi Audio MC331. You can easily switch between audio sources with the help of the remote control, ensuring a seamless and enriched listening experience.
-
Amazing Combination: As an integrated tube DAC amp with a VU meter, the visual aesthetics of the 5654W vacuum tubes and VU meter add a nice warm and soft effect to not only the appearance but the sound as well, giving the modern look a retro feel.
-
Setup Flexibility: It supports Bluetooth, USB, coaxial, optical, and RCA inputs, making it compatible with a variety of sources such as computers, phones, CD players, turntables with built-in phono preamps, etc., allowing you to build various systems.
-
Compact Yet Powerful: The MC331 only takes up minimal desktop space but boasts a maximum power output of 105W x2@4Ω, effectively driving your bookshelf speakers. Additionally, it has a pre-out and a 3.5mm headphone output, making it versatile enough.
- User-Friendly Design: The MC331 comes with a remote control, allowing you to adjust bass and treble from the comfort of your listening chair. Its replaceable tube design lets you customize the sound signature to suit your personal preferences.
Specifications
- MAX Power Output:
105W×2@4Ω - Input Mode: Bluetooth +RCA +USB +COA+OPT
- Output Mode: Passive Speakers Output, Pre-Out, 3.5mm Headphone Output
- THD: ≤0.03%
- SNR: ≥100dB
- Device Dimension: 10 x 2 x 2.7 inches
- Terminating Impedance: 4-8 Ohm
- Power Supply: 24V/4.5A
What‘s in the box?
- MC331 Power Amplifier x 1
- 24V/4.5A Power Adapter x 1
- User’s Manual x 1