Hello from France, I found the YT channel from Stephe, and decided to get my first Tubes Amp I plan to apply Stephe mods to get a much better Amplifier A12 price is the double of A10 price (500$ versus 240$ on China-hifi-audio website) As far as I could find, main differences between them seem to be the quality of the OutPut transformers ( perhaps others ones ??...) Do you think that the a12 quality and sound is worth its price ? Regards, JC @Stephe, thanks a lot for your great videos and Website !