Fosi Audio ZA3vsTopping PA7 Plus
A detailed side-by-side comparison of the Fosi Audio ZA3 and Topping PA7 Plus — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Fosi Audio ZA3
Topping PA7 Plus
Class
D
D
Chipset
TI TPA3255
Proprietary / Modified Class D
Topology
Balanced Stereo / Mono
—
Power
155W x 2 (4Ω)
2 × 245W @ 4Ω (1% THD) / 2 × 300W @ 4Ω (10% THD)
Inputs
RCA, XLR
XLR/TRS (Balanced), RCA
Features
Subwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Volume Bypass (Pure Power Amp Mode), 12V Trigger
Sinad
—
102 dB (excellent for Class D)
Remote Control
✗
✗
Tube Stage
✗
✗
Price (estimated)
Price
~$132
~$549
Difference
~$417.00 cheaper (Fosi Audio ZA3)
Things to Know
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.
Topping PA7 Plus
- ⚠External power brick is massive and can be difficult to hide.
- ⚠Runs warmer than typical Class D amps due to high power density.
- ⚠No remote control (intended to be used with a preamp like the E70).
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