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Fosi Audio
Fosi Audio ZA3
~$132
Estimated price · may vary by retailer
The stereo benchmark for budget Class D. While it lacks the PFFB of the V3 Mono, it offers balanced inputs and a subwoofer output in a slightly larger, better-vented chassis than the original V3.
Specifications
ClassD
ChipsetTI TPA3255
TopologyBalanced Stereo / Mono
Power155W x 2 (4Ω)
InputsRCA, XLR
FeaturesSubwoofer Out, Trigger Input (dependent on revision), Op-Amp Rolling
Things to Know
- ⚠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.
Reviews
“The reviewed amp keeps the sound neutral. It follows the “wire with gain” route. What stands out to me is the amount of detail and control it holds over speakers, even those hard to drive.”
— Ear Fidelity
“A Quiet Background That Lets Music Breathe. One of the most notable aspects of the ZA3's performance is its low noise floor. In practical use... the amplifier maintains a remarkably silent background.”
— Fosi Audio Blog (Review Aggregation)
Video Review
▶CheapaudiomanYouTubeBuy on AmazonBuy on AliExpress
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