Fosi Audio V3 MonovsFosi Audio ZA3
A detailed side-by-side comparison of the Fosi Audio V3 Mono and Fosi Audio ZA3 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio V3 Mono
Fosi Audio ZA3
Class
D
D
Chipset
TI TPA3255 (with PFFB)
TI TPA3255
Topology
Monoblock
Balanced Stereo / Mono
Power
240W @ 4Ω (48V/5A supply)
155W x 2 (4Ω)
THD / SINAD
-120 dB (SINAD via XLR)
—
Inputs
RCA, XLR / ¼” TRS
RCA, XLR
Features
Auto-Standby, 12V Trigger, Gain Switch (25dB/31dB)
Subwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$131
~$132
Difference
~$1.00 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.
Fosi Audio ZA3
- ⚠Frequency response is load-dependent (high frequencies may rise with 8Ω loads due to lack of PFFB).
- ⚠The subwoofer output is full-range pass-through on the main terminals; it does not filter bass from the main speakers.
- ⚠Volume control is defeated in Mono mode, requiring a preamp.
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