---
product_id: 677084389
title: "MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA"
brand: "fosi audio"
price: "2202 kr"
currency: DKK
in_stock: true
reviews_count: 7
category: "Fosi Audio"
url: https://www.desertcart.dk/products/677084389-mc331-tube-integrated-amplifier-with-dac-2-channel-home-audio
store_origin: DK
region: Denmark
---

# Vintage 5725W tube + VU meter Bluetooth + USB/Opt/Coax/RCA inputs 105W x2 power output MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA

**Brand:** fosi audio
**Price:** 2202 kr
**Availability:** ✅ In Stock

## Summary

> 🎶 Vintage vibes, modern power — sound that commands your space.

## Quick Answers

- **What is this?** MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA by fosi audio
- **How much does it cost?** 2202 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/677084389-mc331-tube-integrated-amplifier-with-dac-2-channel-home-audio)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power that fills your space:** 105W per channel drives bookshelf speakers with room-filling clarity.
- • **Compact design, maximum impact:** Sleek 6x5 inch footprint fits any desktop or shelf without sacrificing power.
- • **Tailor your sound from the couch:** Remote control adjusts bass, treble, and input—plus easy tube swaps for personalized tone.
- • **Seamless multi-source connectivity:** Bluetooth, USB-C, optical, coaxial, and RCA inputs cover all your devices effortlessly.
- • **Iconic tube warmth meets modern tech:** 5725W vacuum tubes and amber VU meter deliver rich, warm sound with retro style.

## Overview

The Fosi Audio MC331 is a compact, 2-channel tube integrated amplifier with a built-in Texas Instruments DAC, delivering 105W per channel at 4Ω. It supports Bluetooth, USB-C, optical, coaxial, and RCA inputs, making it versatile for all your audio sources. Featuring warm 5725W vacuum tubes and a stylish amber VU meter, it combines retro aesthetics with modern functionality, including a remote control and headphone output. Perfect for audiophiles seeking rich sound and flexible connectivity in a sleek, durable metal chassis.

## Description

Buy Fosi Audio MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA: Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Amazing - There are basically two categories of inexpensive audio equipment: "you get what you pay for" and "capable of embarrassing much more expensive equipment". I think Fosi has garnered the reputation at this point to run for president of the latter group. I love this amp. I'm a musician and high quality audio is important to me, so believe me when I say it sounds good. The warmth and quirks of the tubes is very audible. Play music through it before they're fully warmed up (and they do get quite warm) and the sound is harsh and lacking dynamic range. Give it a few minutes and the sound mellows out and the sound stage comes into its own. There's easily enough power to fill a room, and it's sounded full and detailed with every genre. I also really appreciate the style and build quality of this unit. Unlike many other products at this price point, the construction is entirely metal; and not foil-thin metal the flexes under minimal strain. It feels sturdy, thick, and has a decent weight. There's no plastic here (except for the shield on the vu meter and the protection tubes around the vacuum tubes, which I don't mind). Even the knobs on the front are metal, and feel very satisfying in the hand. The connections on the back are also solid, if a bit small and close together. I think banana plugs are pretty much a must on this unit, unless you want to spend 10 minutes "threading the needle". Out of the box, the tubes come separately and you attach them yourself, giving it a bit of a DIY feel. Maybe having to partially assemble the unit yourself heightens the emotional connection. It's not just plug-and-play; you actuay have to spend some time interacting with it before you can use it. The tubes are featured prominently, but the amp makes no obfuscation of the fact that it's a thoroughly modern piece of equipment. There's a minimalist aesthetic here that I appreciate, and it's pulled off much much better than the brands that try to go for a faux-vintage look. The volume knob is doubles as the input selector by pushing it and the power button by pushing and holding for a few seconds. Turning it on or off, either with the power button or the handy remote, the unit gives a satisfying click. The only other controls, the bass and treble knobs, are very functional. The dichromatic amber-on-black is visually pleasing, and the amber lighting around the tubes is actually tastefully done I think. Tubes naturally have a dim glow, but many units (especially cheap ones) feel the need to play this up by covering the tubes in LEDs that usually look tacky. Here, the subtle amber glow accentuates the tubes, I think, rather than obfuscates them. The VU meter is also just fun. I think that's about all I have to say. I'm gonna go back to listening now.
Review: Great value in quality Amp to power passive speakers in a shelf or desktop environment - I had heard good things about this manufacturer's amplifiers, and I needed something a little more than a one input amplifier. This integrated amplifier allows you to connect via Bluetooth, USB-C, RCA and optical, allowing me to use this to connect to an Arylic streamer and my PC. I was initially reluctant to purchase something that uses tube technology, since I'm not sure how long they will last. My previous solid state receiver lasted 20 years with no issues until last month when it started getting cross talk issues between FM and other inputs. With the Fosi MC 331 on sale I thought I'd take a chance. My concerns are unfounded so far, since the tubes are only for the pre-amp stage and are easy to insert and replace. I've even come across some suggested tubes that allegedly improve the sound, although the sound with the included tubes is terrific. I'm not crazy about the user interface, since the volume dial is used to adjust the volume, switch between the sources by single clicking, and a power switch, by long pressing. I have some unusual banana plugs that I was unable to use since they are not the usual type but are flexible and intended to be used in the clip type speaker posts but this amp only allows for standard rigid banana plugs and using bare wire to insert into holes under the twist-tight speaker posts. You'll be better off with thinner speaker wire if you don't have rigid banana plugs and need to attach using bare wire, as the 14 AWG speaker wire I use barely fits. Thinner wires are fine for shorter runs, so I wouldn't be worried if this were to power nearby bookshelf speakers, which I suspect will be the most frequent use case for this amp. The built-in Texas Instrument DAC allows this to be connected to my PC via USB-C cable and the improvement over the original Realtek sound from the HP PC and RCA cables was noticeable. Some caveats: the manufacturer provides tube protectors to keep you from touching the glass tubes as they are fragile and get quite hot so don't touch them with the power on. It takes the tubes 15 to 20 seconds to warm up, so make sure to turn the amp on before you sit down to enjoy your music. This amp is tiny and fits easily on the shelf with the shelf speakers, which are 10 1/2 inches tall. By comparison. the receiver this replaced took up all the available shelf space. Have to move some stuff around now with the extra space. This also has a headphone amp, but note that while using the headphone output, the speaker outputs are not available. A remote control is included, but you'll need two AAA batteries, as none are supplied. If I run into any issues with this I'll update the review, but so far very happy with this purchase.

## Features

- 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 5725W 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DM1VLXHN |
| Best Sellers Rank | #17,228 in Electronics ( See Top 100 in Electronics ) #75 in Audio Component Amplifiers |
| Brand | Fosi Audio |
| Date First Available | November 5, 2024 |
| Global Trade Identification Number | 00466597167685 |
| Item Weight | 4 pounds |
| Item dimensions L x W x H | 5.94 x 5.31 x 1.97 inches |
| Item model number | MC331 |
| Manufacturer | Shenzhen Foresight Technology Co., Ltd. |
| Material | Glass |
| Mounting Type | Freestanding |
| Number of Channels | 2 |
| Output Power | 105 Watts |
| Package Type Name | box |
| Product Dimensions | 5.94 x 5.31 x 1.97 inches |
| Specification Met | Internal/Industry Standards |
| UPC | 466597167685 |
| Voltage | 110 Volts (AC) |

## Product Details

- **Brand:** Fosi Audio
- **Item dimensions L x W x H:** 5.94 x 5.31 x 1.97 inches
- **Manufacturer:** Shenzhen Foresight Technology Co., Ltd.
- **Mounting Type:** Freestanding
- **Voltage:** 110 Volts (AC)

## Images

![MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA - Image 1](https://m.media-amazon.com/images/I/611aJMzhSPL.jpg)

## Questions & Answers

**Q: The volume is very low when connecting the turntable to the MC331. Do I need a turntable preamp?**
A: If your turntable does not have a built-in preamp, you will need to add a separate phono preamp (such as the BOX series). If your turntable has a built-in preamp, make sure it's set to LINE mode to output the signal properly.

**Q: Q: What is the purpose of the pre-out port on the MC331?**
A: The MC331 has a pre-out port that can be connected to a powered subwoofer, speaker, or another amplifier with passive speakers for better sound quality.

**Q: Can headphones and passive speakers play simultaneously?**
A: The MC331 defaults to headphone output priority. To use speaker output, you need to disconnect the headphones first.

**Q: What tube models are compatible for replacement?**
A: The following tube models are compatible: EF95, 6AK5, 6AK5W, 403A/403B, 6J1, 6J1P, 6J2, 6J3, 6J4, 6J5, among others. You can test and choose based on your personal preference.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing
*by A***N on December 27, 2025*

There are basically two categories of inexpensive audio equipment: "you get what you pay for" and "capable of embarrassing much more expensive equipment". I think Fosi has garnered the reputation at this point to run for president of the latter group. I love this amp. I'm a musician and high quality audio is important to me, so believe me when I say it sounds good. The warmth and quirks of the tubes is very audible. Play music through it before they're fully warmed up (and they do get quite warm) and the sound is harsh and lacking dynamic range. Give it a few minutes and the sound mellows out and the sound stage comes into its own. There's easily enough power to fill a room, and it's sounded full and detailed with every genre. I also really appreciate the style and build quality of this unit. Unlike many other products at this price point, the construction is entirely metal; and not foil-thin metal the flexes under minimal strain. It feels sturdy, thick, and has a decent weight. There's no plastic here (except for the shield on the vu meter and the protection tubes around the vacuum tubes, which I don't mind). Even the knobs on the front are metal, and feel very satisfying in the hand. The connections on the back are also solid, if a bit small and close together. I think banana plugs are pretty much a must on this unit, unless you want to spend 10 minutes "threading the needle". Out of the box, the tubes come separately and you attach them yourself, giving it a bit of a DIY feel. Maybe having to partially assemble the unit yourself heightens the emotional connection. It's not just plug-and-play; you actuay have to spend some time interacting with it before you can use it. The tubes are featured prominently, but the amp makes no obfuscation of the fact that it's a thoroughly modern piece of equipment. There's a minimalist aesthetic here that I appreciate, and it's pulled off much much better than the brands that try to go for a faux-vintage look. The volume knob is doubles as the input selector by pushing it and the power button by pushing and holding for a few seconds. Turning it on or off, either with the power button or the handy remote, the unit gives a satisfying click. The only other controls, the bass and treble knobs, are very functional. The dichromatic amber-on-black is visually pleasing, and the amber lighting around the tubes is actually tastefully done I think. Tubes naturally have a dim glow, but many units (especially cheap ones) feel the need to play this up by covering the tubes in LEDs that usually look tacky. Here, the subtle amber glow accentuates the tubes, I think, rather than obfuscates them. The VU meter is also just fun. I think that's about all I have to say. I'm gonna go back to listening now.

### ⭐⭐⭐⭐⭐ Great value in quality Amp to power passive speakers in a shelf or desktop environment
*by J***W on June 24, 2025*

I had heard good things about this manufacturer's amplifiers, and I needed something a little more than a one input amplifier. This integrated amplifier allows you to connect via Bluetooth, USB-C, RCA and optical, allowing me to use this to connect to an Arylic streamer and my PC. I was initially reluctant to purchase something that uses tube technology, since I'm not sure how long they will last. My previous solid state receiver lasted 20 years with no issues until last month when it started getting cross talk issues between FM and other inputs. With the Fosi MC 331 on sale I thought I'd take a chance. My concerns are unfounded so far, since the tubes are only for the pre-amp stage and are easy to insert and replace. I've even come across some suggested tubes that allegedly improve the sound, although the sound with the included tubes is terrific. I'm not crazy about the user interface, since the volume dial is used to adjust the volume, switch between the sources by single clicking, and a power switch, by long pressing. I have some unusual banana plugs that I was unable to use since they are not the usual type but are flexible and intended to be used in the clip type speaker posts but this amp only allows for standard rigid banana plugs and using bare wire to insert into holes under the twist-tight speaker posts. You'll be better off with thinner speaker wire if you don't have rigid banana plugs and need to attach using bare wire, as the 14 AWG speaker wire I use barely fits. Thinner wires are fine for shorter runs, so I wouldn't be worried if this were to power nearby bookshelf speakers, which I suspect will be the most frequent use case for this amp. The built-in Texas Instrument DAC allows this to be connected to my PC via USB-C cable and the improvement over the original Realtek sound from the HP PC and RCA cables was noticeable. Some caveats: the manufacturer provides tube protectors to keep you from touching the glass tubes as they are fragile and get quite hot so don't touch them with the power on. It takes the tubes 15 to 20 seconds to warm up, so make sure to turn the amp on before you sit down to enjoy your music. This amp is tiny and fits easily on the shelf with the shelf speakers, which are 10 1/2 inches tall. By comparison. the receiver this replaced took up all the available shelf space. Have to move some stuff around now with the extra space. This also has a headphone amp, but note that while using the headphone output, the speaker outputs are not available. A remote control is included, but you'll need two AAA batteries, as none are supplied. If I run into any issues with this I'll update the review, but so far very happy with this purchase.

### ⭐⭐⭐⭐⭐ Review
*by T***O on January 20, 2026*

どのモ−ドでも音質が良いいですがモ−ドの表示が小さく見づらいことがある。

## Frequently Bought Together

- Fosi Audio MC331 Tube Integrated Amplifier with DAC, 2 Channel Home Audio Stereo Power Amp for HiFi Bookshelf Speakers/3.5mm Headphones, Vintage VU Meter Preamp with Bluetooth and USB/Opt/Coax/RCA
- Banana Plugs 2 Pairs / 4 pcs - Gold Plated Speaker Plugs for Mini HiFi Stereo Audio Receiver Amplifier for Home Bookshelf/Computer/Desktop Passive Speakers
- Amazon Basics Speaker Cable, Easy Assembly, 16-Gauge, Bronze, 100 ft

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-24*