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

The MC331 Tube Integrated Amplifier is a fantastic choice for music enthusiasts, especially those who appreciate vocal-driven tracks. This amplifier delivers a warm, textured sound signature that enhances the clarity and richness of vocals, making them feel natural and soothing. Whether you're listening to your favorite singers or enjoying acoustic sessions, the MC331 elevates the listening experience with its gentle yet detailed tonal delivery. The built-in DAC ensures crisp and accurate audio reproduction, perfectly complementing its tube amplifier's warm characteristics. Its two-channel stereo setup provides a balanced soundstage that feels immersive without overwhelming bass or treble. In terms of value for money, the MC331 stands out. Its combination of premium sound quality, solid build, and elegant design makes it a must-try for audiophiles on a budget. If you're someone who enjoys vocal-centric music or just appreciates refined audio performance, this amplifier is worth the investment.

This is an awesome product at this price point. but beaware of the package contents. It is highly recommend to make an unboxing video. i received 5725W vaccum tubes instead of 5654W these two have totally different characteristics for audio modulation. This is a very good quality product. Small yet a powerful all in one. Bluetooth connects seemlessly, RCA, Coxial, Optical ports all work smoothly. Headphones sound altogether different, in a good way. It Comes with a good quality power brick and a remote controller. Adds warmth to the audio sound and astethics to the setup with warmly glowing Vaccum Tubes and analog VU meter.

The tube amplifier produces a warmth sound signature where mid tones (vocals) are clear, sharp and upfront, base feels muddy even when we increase the bass knob there is no difference in tune. Functionality (treble and bass knob functionality is not that good won't vary that much),the base is muddy, treble is rolled off ( less sharp more pleasent type) Most of peoples like punchier bass, great vocals and sharp treble which fosi audio mc 331 doesn't provide hence everyone might return this. Who can keep this: those who love genre: jazz, blues, classical. ( Not for rap/hip hop) Ratings: Build quality: 5/5 Looks: 4/5 classy retro touch (the yellowish light in vu meter is high) Sound signature: ?/5 depends upon your taste, can be tuned if you vaccum tubes are available. Russian voskhod tubes are matched for hip-hop/rap genre. Connectivity: 4/5 bunch of inputs but no input for u-disk(pendrive)

When I ordered this Integrated Amplifier, I guess I was the 1st person to Order as there were no reviews found. Meanwhile, when this product was shipped, I got to see a review with only 3 Star stating this Amp cannot be connected to a SubWoofer and that made me to feel skeptical, because my main requirement is to use this Amp for my Home PC with a 2.1 setup. Despite this low rating I decided to wait until the Amplifier gets delivered and hence waited patiently. And the day arrived, the first thing that I did was I connected this to my PC and tested all the inputs paired with my Pioneer Vintage Bookshelf speakers along with an Active Subwoofer wherein I connected the subwoofer to its LFE input. Initially, I was shocked to notice that my Subwoofer was silent and there was no BASS - you know I am a BASS lover, I enjoy songs and videos mostly for the deep BASS effects. However, I didn't loose my hope - I have multiple subwoofers, and most of them are custom made with Plate Amplifiers and luckily all my subwoofers are equipped with multiple inputs (RCA Line In, LFE and the Speaker In/Out). In my 2nd attempt to test the Sub I connected the Pre-out from this Amplifier to the 'Line-in' Input of my subwoofer - Oh Man it was a WoW Moment - It worked!! and what a deep bass it was really awesome. For those who says this cannot be connected to a Subwoofer, please note the 'Pre-Out' from this Amplifier is not throwing out any LFE signals, but a 'Stereo Output', which can be connected to another Stereo Amp to power Speaker-B or to an Active Subwoofer that has 'Line-In' RCA Port. At 100Hz this 'Pre-Out' works well with my Subwoofer and there are no flaws, but it might work with different Hz with other brand Subwoofers. I am not using this Integrated Amp with any Headphones, but with my Creative Sound Blaster X4, which supports multiple sampling rates. Pros: 1. All inputs are working fine, especially the Bluetooth is excellent. 2. It remembers the last used input and selects it when the Amp is turned on. 3. Highs and Mids are very clear, but for the Low Frequencies either use a nice Pair of bookshelf speakers or connect a Subwoofer. 4. It comes with a compact remote which is not the case in all the brands at this price range. 5. It looks very elegant and I love the 'Volume Unit Meter', it makes to feel it Vintage. 6. No distortions were observed even at high volume; thanks to the VU-Meter that helps to monitor the db level. 7. The Volume control also attenuates the 'Pre-Out' level, which is not found in all the Amplifiers and I have seen few amplifiers that controls only the Stereo and the Subwoofer works even there is no output from the Speakers. Cons: 1. There is no ventilation provided for the heat to dissipate like other models in this Brand. 2. There is no option to dim the 'VU-Meter' light, which glows very bright. 3. Would be great if the input power supply is given as 240V, instead of an external step-down Power Adaptor that limits the Wattage per Channel. 4. Should have included a HDMI port with ARC (saying this because it has a wonderful DAC inside). 5. Option for connecting a Passive Subwoofer isn't available, would be great if included. 6. Installing the Tubes was quite hard and little risky as there is chance for breaking - they should have installed it and modified the Packaging Box so that it becomes a plug and play device without any risks while doing the initial setup. 7. There are no indications on the volume level - there is no min/max level set in the Master Volume and hence I am setting the PC Volume to the minimum to avoid any damage to the connected speakers. Also there is no MUTE button included in the Amplifier. Despite having these much cons, I have rated this as 5 Stars because there is no option to mark it as 4.5 Overall experience is good and it exceeded my expectations that makes me to give this rating!!! I hope the readers found my review helpful. Thank You.

Small but powerful and decent amplifier - Nice sound translation. Good stereo image, warm sound quality. Decent looks and feel factor. Enhances feel of living room.

Un pre amplificador con un dac integrado que le da calidez a las cuerdas y voces, ayuda muchísimo cuando quieres modular graves o agudos y en general tiene un gran desempeño.

30年以上使っていた古いアンプの調子が悪くなったので、購入しました。 とても小さくずっしり重く高級感があります。 真空管とアナログメーターもレトロな雰囲気が有り良い感じです。 レコードプレーヤーとスピーカーとの接続も問題無く、良い音を出してくれます。 昔は無かったBluetoothも使えるので、便利になりました。 愛用します。

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.

Very nice sounding amplifier, amazing with my Bose series 4

Excelente