Fosi Audio TB10D (Upgraded)vsFosi Audio ZA3
A detailed side-by-side comparison of the Fosi Audio TB10D (Upgraded) and Fosi Audio ZA3 — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio TB10D (Upgraded)
Fosi Audio ZA3
Class
D
D
Chipset
TI TPA3255
TI TPA3255
Power
2 × 300W (Max) / ~100W Clean @ 4Ω
155W x 2 (4Ω)
Inputs
RCA
RCA, XLR
Features
Bass and Treble Tone Controls
Subwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Topology
—
Balanced Stereo / Mono
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$70
~$132
Difference
~$62.00 cheaper (Fosi Audio TB10D (Upgraded))
Things to Know
Fosi Audio TB10D (Upgraded)
- ⚠Volume control is logarithmic but very sensitive; gets loud at the 9 o'clock position.
- ⚠Tone controls lack a center detent, making it hard to know when you are truly 'flat'.
- ⚠DC input spark is common when plugging in the power supply (connect to amp first, then wall).
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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