The Fosi Audio MC351 is a 2.1-channel integrated amplifier with a built-in DAC and two TI TPA3255 Class D chips, rated up to 165W × 2 + 350W into 4Ω, with Bluetooth 5.3, USB, optical, coaxial and RCA inputs; this bundle includes the 32V/5A power adapter. It suits bookshelf-speaker and TV setups that want to add a passive subwoofer without a separate sub amp.
Who the Fosi Audio MC351 is for
TV and movie nights: Optical and coaxial inputs take a TV's digital audio at up to 32-bit/192kHz, and separate binding posts drive a passive subwoofer.
Computer and phone listening: The USB input decodes up to 24-bit/96kHz, and Bluetooth 5.3 receives SBC and AAC streams.
Turntable and retro setups: The RCA line input accepts a turntable with a built-in or external phono preamp, and the VU meter needle tracks signal level.
Growing a system: A 3.5mm pre-out feeds an active subwoofer, powered speakers or another amp, and follows the volume knob but not the tone controls.
Everyday convenience: Bass and treble knobs have center detents, input settings are restored after a restart, and the amp enters standby after 2 minutes without signal.
Skip it if: You want the most subwoofer power out of the box; Fosi Audio notes the MC351 accepts up to 48V for that, while this bundle ships with the 32V/5A adapter.
Fosi Audio MC351 key specs
Amplifier chips: 2 × TI TPA3255, Class D
Max output power: 165W × 2 + 350W @ 4Ω
Inputs: Bluetooth 5.3 (SBC, AAC), USB, optical, coaxial, RCA
Outputs: Speaker and passive subwoofer binding posts (4–8Ω), 3.5mm pre-out
Digital input resolution: USB up to 24-bit/96kHz; optical/coaxial up to 32-bit/192kHz
SNR / THD: ≥100dB / ≤0.03%
Tone controls: Treble ±6dB, bass ±12dB, center detents
Power: 32V/5A adapter, included; accepts DC 24–48V
Size: 7.28 × 5.0 × 2.24 in
In the box: MC351 amplifier, 32V/5A power adapter, Bluetooth antenna, user manual
Genuine Fosi Audio stock. Free shipping on every order, 45-day returns.
Fosi Audio MC351 vs similar options
vs Fosi Audio BT20A MAX: Adds PFFB, Bluetooth 6.0 and a 48V supply for a 300W x 2 rating; pick the MC351 for a VU meter and a built-in DAC with USB, optical and coaxial inputs.
vs SMSL AO300 PRO: Adds HDMI eARC and LDAC/aptX HD Bluetooth at the same 165W x 2 @ 4Ω rating; pick the MC351 to power a passive subwoofer from the same box.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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