it's buzzing 'coz it's f***ed, but it won't damage your QY. not as if it's going to flatline and send
direct mains though to a 9-12v device.
i think switching PSU's are pretty good, lightweight. regretting giving away a good'un (12vDC)
with an rm1x i sold. it was great. have another one, tiny, delivers enough mA. think it's worth
seeking those out - portability, less weight. there's no magic afaik. the only PSUs you should
hold onto religiously are Boss PSA's for Boss and Roland products; there's some mojo in
there. you get hums and extraneous noise on old Boss/Rolands if it isn't the OG.(why?...)
got another rm1x, came with the original Yamaha PSU, and that thing is a brick - i know the rm1x
will work with any 12vDC of correct ampage, so i'm waiting to find another nice switching 12v.
