View attachment 329705
Unlike the A07 Max, which explicitly states that it uses PBTL mono mode, Fosi ZA3's introduction does not mention PBTL at all.
Based on the TPA3255 datasheet, I speculate that Fosi ZA3 uses mono BTL configuration, not PBTL.
This also explains why ZA3's mono mode uses the right channel instead of L+ and R+.
@Fosi Audio, please clarify whether ZA3's mono mode is in PBTL mode.
If my speculation is wrong, I am willing to apologize to
@Fosi Audio.
However, if my speculation is correct, I believe that this is the biggest design decision mistake of ZA3.
This makes ZA3's mono mode seem like a rushed design that was made to compete with the A07 Max.