The attached pics shows our take of the BA...circuit modified for a DIYed "Melville" 2520, Cinemag input and output xformers..and I wanted to have 8 channels in 1RU.. there's no such thing on the market..! At least with these sonic performances..

This thing is insane! Sounds really amazing..Very fat, tight and punch!! Also the highs are superb..kinda smooth!! simply lovely! THANK YOU Neeno!! And thanks to Cinemag for the awesome xformers!!(Of course thanks to Joe for the BA kits..)..
we were a bit concerned about having the output xformers so close to each other.. but no problems!

The front pics shows that the 812a was not finished yet.. but it is now..!
Have fun building your preamps!
Ciao
Cheu