Audio Research Refernce 75se

@mike30 It sounds like you have your bases covered. Have fun!

But be careful.

Ask seller if it possible to look inside…so you could figure out where the buzzing comes from….  buzzing could come from one of the warming up tubes… if so that is not a problem at all. 

De-lamination of the transformer is very likely. I owned a Counterpoint 5000 preamp years ago that started to develop a mechanical buzz that didn’t come through the speakers. It turned  out that this was a known problem with this transformer. And it was not a cheap Chinese unit, but a high end made in USA transformer. Sh_t  happens!

my ref 75 is silent

@discopants 

Thanks for clarification. These are led lights indeed, not halogen as I mistakenly said and the dimming part is causing the amp buzzing. Without dimming them, zero buzz.