Fosi Audio MC331 vs Fosi Audio MC351 Detailed Comparison

Fosi Audio MC331 vs Fosi Audio MC351

Amp to replace

Change

Fosi Audio MC331

Integrated Amplifier | 105 watts RMS into 4-ohms

Check price atAmazon›

Change

Fosi Audio MC351

Integrated Amplifier | 165 watts RMS into 4-ohms

Check price atAmazon›

Fosi Audio MC331

Check price atAmazon›

Fosi Audio MC351

Check price atAmazon›

Fosi Audio MC331

See at AMAZON

Fosi Audio MC351

See at AMAZON

Fosi Audio MC331 vs Fosi Audio MC351 Integrated Amplifier Comparison

In this review, we will be comparing MC331 and MC351, two Integrated Amplifiers by Fosi Audio. Let's have a brief look at the main features of Fosi Audio MC331 and Fosi Audio MC351 first before getting into our more detailed comparison.

Key Specs	Fosi Audio MC331	Fosi Audio MC351
Power	105 watts x 2 channels maximum into 4 ohms. Fosi publishes no 8 ohm rating	165 watts x 2 channels into 4 ohms plus 350 watts on the subwoofer channel. Fosi publishes no 8 ohm rating
Amplifier class	Class D	Class D
Tubes	Hybrid tube (2x 5654W)	Solid state
Built-in DAC	Yes	Yes
Phono input	No	No
Headphone output	Yes	No
Bluetooth	Yes	Yes
Dimensions (H x W x D)	2-11/16" x 10" x 2" 68.6 x 254 x 50.8 mm	2-1/4" x 7-1/4" x 5" 56.9 x 184.9 x 127 mm

The sections below take each area in turn: power output, inputs and outputs, features and physical size.

**This post contains affiliate links, and we will be compensated if you make a purchase after clicking through our links. As an Amazon Associate I earn from qualifying purchases.

Reasons to choose Fosi Audio MC331 over Fosi Audio MC351

MSRP Price(*)	130USD vs 190USD	costs less (*prices may change depending on the seller, location and time)
Headphone Output	Yes vs No	Connect your headphone to the amplifier
Base Surface Area	129.0cm²/ 20.0inch² vs 234.8cm²/ 36.4inch²	takes less space in your room

Reasons to choose Fosi Audio MC351 over Fosi Audio MC331

Watts into 4-ohms	165 watts vs 105 watts	Delivers higher power into 4-ohms speakers
Height	56mm vs 68mm	Easier to fit in smaller spaces

Inputs and Outputs

The input and output selections that are offered is an important factor when comparing two amplifiers. Here you can find how the I/O selections of the Fosi Audio MC331 and Fosi Audio MC351 differs from each other.

Fosi Audio MC331 Inputs

Total Number of Analog Inputs: 1
Yes Optical Digital Input
Yes Coaxial Digital Input
USB Input:

Fosi Audio MC351 Inputs

Total Number of Analog Inputs: 1
Yes Optical Digital Input
Yes Coaxial Digital Input
USB Input:

Outputs

Stereo RCA pre out Preamp Outputs
Yes Headphone Output

Outputs

Stereo RCA pre out Preamp Outputs