Bias Control, look for external control, some have meters. My early Cayin A88T tube integrated Amp has internal adjustments. (I needed 16 ohm taps).
Later Cayin models, only 8 and 4 ohm taps, have external bias. I highly recommend Cayin.
As for made in China,
this Cayin is an example of a unit designed by others (Germans I think I read), and made in China.
First thing I did was take the bottom off, WOW, Impressive!! It's gorgeous inside and out, superb build quality, sounds terrific.
Do your research and get advice as you are doing, but you shouldn't rule China or other locations out.
Later Cayin models, only 8 and 4 ohm taps, have external bias. I highly recommend Cayin.
As for made in China,
this Cayin is an example of a unit designed by others (Germans I think I read), and made in China.
First thing I did was take the bottom off, WOW, Impressive!! It's gorgeous inside and out, superb build quality, sounds terrific.
Do your research and get advice as you are doing, but you shouldn't rule China or other locations out.