Update 28/03
I finalized the terms of the contract to be able to send my Micro-Bamboo amp to the German laboratory on April 10 to be able to have APx555 measurements from the end of April. I will share this first experience with this lab in another thread so that everyone can follow and react)
PA5 II is the updated version of PA5 with a best reliabilty (in regard of the OP amps issue)
Pictures of PA5 have been shared here with the TPA3251 chip highlighted.)
Take a look @ my ASH-400 project. I spent $ 280 for that awesome amp )
A well done TPA3255 PFFB Mono should give (with a 500W PSU @ 48V)
@the knee :
About 190W @ 4R
About 100W @ 8R
If you want to get an idea, you have to compare chips that are comparable to each other. In this case, this Fosi Mono has two main competitors:
- 3E Audio 480-1-29A Mono TPA3255 /...
Let s wait for the ASR review for the FB100 )
Don t get me wrong Topping RA3 = 319 euros + 91e shipping + VAT = more than 400 euros
https://fr.aliexpress.com/item/1005005787838746.html
RA3 is based on the TPA3251. Could hardly compare it to this Fosi TPA3255.
The new Sylph FB100 is better than the RA3. Same chip with advanced PFFB
Check pre measurements )
@5W/4R > we break the barrier of -106db Sinad...
Hummm it s not the angle for me.... Check without binding posts
https://audiosciencereview.com/forum/index.php?threads/fosi-v3-mono-tpa3255-pffb-balanced-first-look-from-fosi-fb.52969/post-1914215