Fosi Audio TB10D vs Fosi Audio V3 Stereo Amplifier

Both are compact Fosi Class-D amps built on the TI TPA3255 chip, so they sound more alike than different. The V3 is the better finished product: lower distortion figures, a higher signal-to-noise rating, a full-body heatsink, a pre-out with volume control and swappable op-amps for tuning the sound. The TB10D is the plainer board-in-a-box design with no pre-out and no op-amp swapping. Owners of the V3 praise clean, quiet power and cool running, but note relay clicking, slightly bright highs and a volume knob with most of its range in the first half.

• Choose the TB10D if you want the simplest possible stereo power amp for passive speakers and do not need a pre-out or any tweaking.
• Choose the V3 if you want lower distortion, a pre-out for a subwoofer or second amp, and swappable op-amps to shape the sound.