Not sure what you mean by "brum" noise--are you sure it's from the preamp and not the amp's transformer? If you're talking just about noisy tubes in the preamp, maybe changing the tubes will eliminate the noise. If you really want a balanced preamp, Jadis is a tough one to beat, another possibility would be BAT, which is a true balanced preamp.
need balanced tube preamp used
Hey guys, I used to have Neo 500 and was not too happy with them, I used them through McIntosh MCD1100 sacd/ preamp and obviously that was a big problem, now I have Manley 240's and Jadis DPL and I am very happy. I need replace Jadis because of the brum noise from my Tannoy Westminsters, I need balanced preamp, any sugestions? Jadis sounds great, maybee Jadis JPS8? Or perhaps McIntosh 2500? I like to spend up to $6000 for used. Any sugestion for some great preamp?