Official Store
The Fosi V3 Mono is the pick if you care about objective performance and features like PFFB, which helps it stay less load dependent with different speakers. In my room, I heard slightly better separation, soundstage, and clarity versus the ZA3, but it does come with higher setup cost and less built-in flexibility.
Pros
- +PFFB makes it less load dependent
- +Measures and performs objectively better (per ASR measurements I referenced)
- +Slightly better separation and soundstage in my setup
Cons
- -Higher initial cost because you need two for stereo
- -No subwoofer output on the amp itself
- -Runs warmer; I recommend extra airflow and not stacking
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Official Store
Available on Fosiaudioshop
External purchase
Highlights
- +PFFB makes it less load dependent
- +Measures and performs objectively better (per ASR measurements I referenced)
- +Slightly better separation and soundstage in my setup
Recommended by
Late Night Unboxing