150$ amp

[Kotter67]

Ok, got my Sunbuck TPA3221 (from the AliExpress "Sunbuck Store" for $18) and it is not the same as the Shui Yuan. They use SY pictures in the listing, as well as their own version which uses SMD electrolytic input caps instead of film. I received the SMD input cap version. Very similiar, but not the same, and the Sunbuck's tiny 1uF smd caps make it more difficult to change input caps, though they are very likely genuine Rubycon YXF on the output side, which is nice, but I was
going to change these anyway to ZLH or FC. Heat sink looks very nice, better than the SY board, more fins. This board came in a well protected small box instead of a padded white envelope, which is a plus, and quite quickly to the US ordered on November 5 and received November 19.

I have had a chance to use this amp for a while and my impressions are not positive. I swapped out my TI TPA3551 EVM for it in a fairly good system and I found this amp to be thin sounding in comparison, a bit harsh and hard on the ears, as well as lacking the richness of other TPA based boards I have used. I was hoping to not have to make any changes to it, those smd input caps are going to be tricky to remove, but as is, this amp is not worth owning.