Fosi Audio MC331 Tube Integrated Bluetooth Amplifier with DAC and VU Meter - Fosi Audio

Fosi Audio MC331 Tube Integrated Bluetooth Amplifier with DAC and VU Meter

$129.99

+ Free shipping

Chinese New Year's Save 15% | FSHN15

Features

All-in-One DAC Amp/Headphone Amp

Replace vacuum tubes 6AK5, 6AK5W, 6Zh1P, 6J1

Mini VU Meter: Classic Retro Vibe

Quantity

Free shipping

Money-Back Guarantee

Customer support

24 Months Warranty

Fosi Audio VOL20 Bluetooth Volume Control Knob

$49.99

Fosi Audio Banana Plugs for Speaker Wire, 2 Pairs/4 PCS Gold Plated Speaker Plugs

$9.99

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 Output

SNR≥100dB; THD≤0.03%; Bluetooth Codecs: SBC, AAC

Hybrid Tube Integrated Amplifier

With a built-in DAC and versatile connectivity, MC331 offers rich, immersive sound.

Maximize Space Efficiency

Fits into your audio system effortlessly, offering high-quality audio with minimal space.

Catering to Most Audio Sources

Connect multiple audio sources simultaneously and switch inputs seamlessly.

Pointer Dances to the Music

Displays audio signal strength in real time to adjust volume and prevent overload.

JAN 5654W Vacuum Tubes

Compatible tubes: 6AK5, 6AK5W, 6Zh1P, 6J1, 6J1P, WE-403A, 403B, EF95, and other 7-pin tubes.

Customize Your Unique Sound

With central detents to easily restore the natural sound.

Easy to Set up and Intuitive to Operate

Allows for adjusting bass and treble from the comfort of your listening chair.

Memory Function

Setting automatically restore to previous upon restart, eliminating repetitive adjustments.

CNC Integrated Design

All-metal casing, finely sandblasted, featuring a minimalist and durable design.

Amplifier Comparison Table

MC331

Fosi Audio MC351 2.1 Channel Integrated Amplifier with DAC, VU Meter and Bluetooth

MC351

Fosi Audio MC101 Bluetooth Stereo Amplifier with VU Meter 2CH HiFi Receiver - Fosi Audio

MC101

Type

Bluetooth 2.0 CH Amp

Bluetooth 2.1 CH Amp

Bluetooth 2.0 CH Amp

MAX Power Output

105W×2@4Ω

165W x 2 + 350W @ 4Ω

100W x 2

Input

Bluetooth +RCA +USB +COA+OPT

Bluetooth 5.3+RCA+COA+OPT+USB

Bluetooth + RCA

Output

Passive SPK+ 3.5mm Headphone

SPK OUT+SUB OUT+3.5mm PRE OUT

Passive Speakers+Pre-Out

Treble&Bass Control

THD

≤0.03%

SNR

≥100dB

Learn More

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

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

MC331 Power Amplifier x 1

24V/4.5A Power Adapter x 1

User’s Manual x 1

first feedback

after 10 days of waiting, I received my product which meets expectations. However, 3 major points to improve from my point of view:
- the Bluetooth connection is really not easy compared to other products using the same technology
- the size of information writing must be increased
- the performance of the remote control is also too low

Not Perfect

I purchased this to replace a Fosi MC351 so I could get a remote and get rid of the annoying thump from my SVS sub when turning on and off the 351.
There is no thump with the 331. Possibly by providing a grounded plug on the ac adapter which the 351 didn't have. The grounded ac adapter on the 331 did introduce a ground loop with my Hafler preamp which required a cheater plug to kill the loop. The remote included is very weak and has to be pointed perfectly at the unit to get it to function. 5-10 degrees off center, and the remote wont connect with the IR receiver on the 331.
The amp is also way underpowered compared to the 351. You can drive it to clipping pretty easily at pretty low SPLs unlike the 351 which got plenty loud and didn't clip.
Bass and treble controls are backwards just like the 351 and are attenuated too much.
The amp sounds pretty pedestrian upon start up. Once the 331 warms (10 minutes) up it sounds pretty good, but doesn't get loud enough for my larger room.
Fosi, Please make a revised 351 with the same TI amps (remove the useless 2.1 amp for a passive sub which no one uses), add a decent remote, switch the bass and treble locations to the standard orientation used for decades, add a second VU meter for the other channel, fix the powered sub thump on power on/off and you will have a winner. Adding a MM phono preamp input would also be nice. I don't use the DAC so I cant comment on how it sounds. My Denon CD player goes through the Hafler as does my Dual TT and my TV.
The 331 isn't bad but it's not great.

MC331 Tube Amplifier

The sound quality is good for the price I paid. Decided to buy this as second unit for friend. To my disappointment, both units with the type c USB port not working. Are u able to offer any solution?

It's fantastic

This is perfect for my little desk set up and my two passive speakers
I can easily switch between my CD player,my laptop and my phone's Bluetooth
The VU meter is hella cool even though you gotta go quite loud to see some needle action
I recommend big time

BUENO

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Fosi Audio MC331 Tube Integrated Bluetooth Amplifier with DAC and VU Meter

Fosi Audio VOL20 Bluetooth Volume Control Knob

Fosi Audio Banana Plugs for Speaker Wire, 2 Pairs/4 PCS Gold Plated Speaker Plugs

Fosi Audio MC331 Hybrid Tube Integrated Amp

All-in-One DAC Amp/Headphone Amp

Hybrid Tube Integrated Amplifier

Maximize Space Efficiency

Catering to Most Audio Sources

Pointer Dances to the Music

JAN 5654W Vacuum Tubes

Customize Your Unique Sound

Easy to Set up and Intuitive to Operate

Memory Function

CNC Integrated Design

Amplifier Comparison Table

MC331

MC351

MC101

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