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Fosi Audio Fosi Audio MC351 2.1 Channel Integrated Amplifier
- All-in-One DAC Amplifier
- High Power with Great Sound
- 5 input modes: Bass and Treble Controls
- Mini VU Meter: Classic Retro Vibe
Tribute to Classics
MC351 2.1 Channel Integrated Amplifier with VU Meter
Equipped with a built-in DAC, the MC351 supports four types of digital inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system configuration. The inclusion of a circular VU meter adds a touch of vintage aesthetics, providing audio enthusiasts with visual and auditory pleasure.
All-in-One Multifunctional DAC Amplifier
Fosi Audio is dedicated to "redefining HiFi with unmatched value." Inspired by audiophile feedback, we introduce the MC351, a pioneering power amplifier blending decoding and amplification, catering to diverse HiFi needs. Its classic meter design and dynamic pointer movement evoke nostalgia.
- Input: BT/RCA/OPT/USB/COA; Output: Passive Speakers/Subwoofer/Pre-Out
- Amp Chip: TPA3255×2; THD: ≤0.03%; SNR: ≥100dB
- Max Output Power: 165W×2+350W@4Ω
Supports Five Digital/Analog Inputs
Equipped with mainstream inputs Bluetooth/RCA/COA/OPT/USB, compatible with various audio devices.
Visual Dial, Pointer Dances to the Music
Real-time signal display helps you adjust the volume to avoid overload and distortion.
Customize Your Unique Sound
With bass & treble knobs featuring central detents for natural sound reproduction.
Dual Amp Chips for High Power Output
100 aluminum alloy cooling fins improve heat dissipation & sustain high-quality sound performance.
Enables Switching among Various Audio Sources
Save the hassle of repeatedly plugging and unplugging cables, extending the longevity of devices.
Effortless Low-Latency, HiFi Audio Sound
Smartphone + MC351 (Bluetooth Input) + Passive Speakers
Immerse Yourself in a Movie Night
TV + MC351 (OPT/COA Input) + Passive Speakers + Subwoofer
Upgrade Your Audio Setup
Computer + MC351 (USB Input) + Passive Speakers
Unveil Vintage Charm
Turntable+ MC351 (RCA Input) + Passive Speakers
All-Aluminum Alloy Chassis
Features high-quality large-capacity capacitors that enhance sound quality, dynamic range, and stability, extending the amplifier's lifespan.
- All-in-One DAC Amplifier: The MC351 integrated amp features high-resolution decoding capabilities, supporting Bluetooth, USB, Optical, and Coaxial digital inputs. With its extensive input and output options, you can easily set up a 2.1 home theater or other stereo HiFi audio systems.
- High Power with Great Sound: Equipped with two high-end Texas Instruments TPA3255 Class-D amplifier chips and a 100-fin heatsink, the MC351 can stably output up to 165W x 2 + 350W power in a 2.1 channel setup. The dual PCBA separated design ensures that the input and output signals do not interfere with each other, providing you with the purest and most impeccable sound quality.
- User-Friendly Control Design: Supports one-touch switching between 5 input modes and includes bass and treble controls, with central detents for tone defeating, for easy sound customization. It also features an automatic standby function, entering standby mode after 2 minutes of no signal input to effectively reduce power consumption.
- Vintage Charm: The eye candy round mini VU meter adds a classic retro vibe to your sound system. The needle of the level meter will dance to the music, providing you with both visual and auditory enjoyment. The MC351 is an excellent companion for turntables, allowing you to relive classic tracks.
- Exquisite Craftsmanship: Featuring an all-aluminum-alloy CNC integrated design and a finely sandblasted metal finish, the MC351 boasts a seamless body with no visible screws, showcasing minimalist aesthetics. The all-metal body ensures durability, and you can enjoy the peace of mind provided by Fosi Audio's 24-month warranty.
- MC351 Power Amplifier x 1
- 32V/5A Power Adapter x 1
- User’s Manual x 1
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Professional Reviews 75/100
Just Okay
Sound Quality
72/100
Build Quality
76/100
Features Connectivity
83/100
Value for Money
76/100
The Fosi Audio MC351 packs broad digital connectivity, Bluetooth and powered passive-subwoofer capability into an attractive, compact hub. Its bass-forward presentation brings lively weight to casual listening, while USB-C, optical, coaxial and RCA inputs make system building simple. HiFi Turtle found it especially convenient for secondary setups where feature density and a fun, energetic sound matter most.
What Reviewers Are Saying
Pros
Broad connectivity includes Bluetooth, USB-C, optical, coaxial and RCA inputs, plus speaker, powered-subwoofer and pre-out connections.
Compact, attractive hardware that the reviewer found easy to use and convenient.
Bass-forward tuning delivers an energetic, fun low-end character.
&
Cons
Sharp V-shaped tuning can make treble sound harsh, shrill and insufficiently detailed; midrange refinement is only adequate.
Powered passive-subwoofer output lacks level and crossover adjustment, limiting room and system integration flexibility.
USB-C connection to an iPad did not work in the reviewer's testing.
SOUND QUALITY PERFORMANCE 72/100
The review finds a lively but strongly V-shaped presentation, with enjoyable bass emphasis offset by an overcooked and fatiguing top end. Midrange quality is described as merely adequate, and the reviewer ultimately preferred a less expensive RSL alternative.
Transparency Resolution
71/100
Treble is described as shrill and harsh rather than detailed or satisfying. The midrange is said to be present but not especially refined or audiophile-grade.
Tonal Balance Musicality
68/100
The reviewer hears a sharp V-shaped balance: bass has some fun, but the elevated treble makes listening less pleasant. Hot, harsh upper frequencies are presented as the central musical drawback.
Dynamics
75/100
The bass-forward balance gives the amplifier some apparent excitement and enjoyment. However, the review says little directly about transient control, headroom, or composure with demanding speakers.
Soundstage Imaging
75/100
The review provides little direct commentary on stereo width, depth, image focus, or layering. Its listening criticism instead centers on tonal balance and treble behavior.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
76/100
The MC351 is called an attractive piece of hardware and is considered easy and convenient to use. The review offers little detail on chassis construction, internal components, thermal behavior, or long-term durability.
Features Connectivity
83/100
Connectivity is broad for a compact unit, including Bluetooth, RCA, USB-C, optical, and coaxial digital inputs, along with speaker, powered-subwoofer, and 3.5 mm pre-out connections. The reviewer values its convenience, though the inability to connect an iPad by USB was a meaningful frustration compared with the RSL alternative.
Value for Money
76/100
At roughly $180, the reviewer feels performance is broadly in line with expectations for an all-in-one amplifier at that price. However, they explicitly identify less expensive alternatives, particularly the RSL IA25.1, as better buys and find the MC351 difficult to recommend without a very specific need for its feature set.
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Authorized dealers for Fosi Audio Fosi Audio MC351 2.1 Channel Integrated Amplifier
- Acoustic Technologies — online and in-store — Montréal, Québec, Canada (website)
- Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
- Apos Audio — online and in-store — Oakland, California, United States (website)
- Audeos — online and in-store — Żywiec, Województwo śląskie (website)
- Audio 46 — online and in-store — New York, New York, United States (website)
- Audio Domain — online and in-store — Stadtbezirke I, Nordrhein-Westfalen, Germany (website)
- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
- AUDIOPHONICS — in-store — Bordeaux, Nouvelle-Aquitaine, France (website)
- AV Cables — online and in-store — Hornsyld, Denmark (website)
- B&H Photo — online and in-store — New York, New York, United States (website)
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