i love this amp.
sounds fantastic as a tube front-end to my PC based amp sims.
sounds great live too - for higher volumes, i DI out into my Yamaha DSR-115 PA (1300 watts).
the quality is superb - i get ZERO humming - i always make sure my AC power is clean.
https://ypomdigital.wordpress.com/2010/03/15/clean-ac-power-helps-insure-clean-audio-recording/
the PF50-T sounds amazing with guitar too.
i wish more amp makers would include a NO-LOAD DI with their heads.
and just because something is made in China, doesn't automatically make it an inferior product - naive comment. i know US built devices that are horrible.
i highly recommend the PF50-T - understand it's volume limitations and you are set!