This in-depth review delves into the FOSI MC351 integrated amplifier, examining its features, performance, and overall value. We unpack the amplifier's stylish aluminum chassis, exploring its connectivity options and intuitive control layout, including the eye-catching vintage-style VU meter. From its comprehensive array of inputs – encompassing Bluetooth, optical, coaxial, and USB-C – to its impressive 165 watts per channel output, we meticulously assess the MC351's capabilities.Our testing encompassed a variety of audio sources and speaker setups, allowing us to evaluate the amplifier's sound quality, power handling, and versatility. We'll discuss the impact of its bass and treble controls, the clarity of its audio output, and the overall listening experience. We also address potential drawbacks, such as the lack of USB-A and microSD card slots, to provide a balanced and comprehensive assessment of the FOSI MC351's strengths and weaknesses.
Pros And Cons
- Aluminum housing
- Simple and sleek controls
- Old school VU meter
- Five different inputs
- Up to 165 watts per channel (2 channels)
- Passive subwoofer output up to 350 watts (4 ohm)
- Multiple connections (optical, coax, USBC)
- Good sound
- Sufficient power for Q Acoustics speakers
- Lacks USBA and Micro SD ports
Read more: Fiio K11 R2R DAC/Amp Review: A Worthy Upgrade or Redundant Luxury?
Unboxing and First Impressions
The FOSI MC351 arrived in a well-packaged box. Included were the amplifier itself, a user manual, an optical cable (useful for TV connections), a USB-A to USB-C cable, and the power brick and cord. The amplifier boasts a sleek aluminum housing with subtle FOSI branding.
The front panel features an attractive old-school VU meter and simple controls including input selector, bass, treble, and volume knobs. The layout is clean and intuitive, making adjustments straightforward.
Turning the amplifier over reveals a comprehensive array of connections, including inputs for Bluetooth, pre-out, two main channels (left and right), and a subwoofer output. It supports up to 165 watts per channel and 350 watts for a passive subwoofer (at 4 ohms).
Sound Quality and Performance
The amplifier was tested with Q Acoustics 2020i speakers and a Monolith M10 v2 subwoofer. During the demonstration, the audio output was clear and detailed, delivering a well-balanced sound.
The bass and treble controls provided a noticeable and helpful range of adjustment, with satisfying click stops at their center points. Volume control was independent from the source device.
The amplifier handled a wide range of audio sources, demonstrating its versatility. I tested it with Bluetooth, and while the audio quality is slightly dependent on the source device, it overall delivers a good listening experience.
Connectivity and Additional Features
Beyond Bluetooth, the FOSI MC351 offers a comprehensive selection of connections: optical, coaxial, and USB-C. This makes it highly adaptable to various audio setups, from TVs to computers.
The absence of USB-A or micro SD card slots might be a drawback for some users who prefer playing audio directly from these devices.
The amplifier’s robust build quality, evidenced by its substantial weight and aluminum casing, provides a sense of durability. However, the aluminum finish is susceptible to fingerprints.
Final Verdict
The FOSI MC351 integrated amplifier delivers excellent sound quality with ample power for most applications, especially in scenarios like desktop setup, or small-to-medium sized home theaters. The included Bluetooth is a nice addition for streaming.
Its robust connectivity and retro-style VU meter add to its appeal. However, the lack of USB-A and microSD card reader options might be considered a limitation by some users.
Overall, this amplifier offers great value for money with clean output and an aesthetic design. The vintage-inspired meter is a nice touch, though the lack of direct input from common sources like USB-A might be inconvenient to some.
