Fosi Audio V3 MonovsSMSL AO300
A detailed side-by-side comparison of the Fosi Audio V3 Mono and SMSL AO300 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio V3 Mono
SMSL AO300
Class
D
D
Chipset
TI TPA3255 (with PFFB)
Infineon MA5332MS
Topology
Monoblock
—
Power
240W @ 4Ω (48V/5A supply)
2 × 165W @ 4Ω
THD / SINAD
-120 dB (SINAD via XLR)
—
Inputs
RCA, XLR / ¼” TRS
HDMI (ARC), USB, Optical, Coax, Bluetooth, Balanced XLR
Features
Auto-Standby, 12V Trigger, Gain Switch (25dB/31dB)
Subwoofer Out, Filters, EQ, Remote
Remote Control
✗
✓
Tube Stage
✗
✗
Price (estimated)
Price
~$131
~$195
Difference
~$64.00 cheaper (Fosi Audio V3 Mono)
Things to Know
Fosi Audio V3 Mono
- ⚠Chassis gets significantly warm due to the compact thermal design coupled with high power density.
- ⚠Auto-standby feature produces a mechanical 'click' that some users find audible in quiet rooms.
- ⚠Requires two separate power bricks (or a specialized splitter) for a stereo pair, adding cable clutter.
SMSL AO300
- ⚠Menu system is small and can be finicky to navigate.
- ⚠HDMI ARC implementation is hit-or-miss with some TV brands (LG specifically).
- ⚠Bluetooth antenna range is shorter than average.
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