I've been having an issue. Occasionally (1-3 times in 2-3 hour session), I'll get a loud 'ground buzz' through my speakers while listening. It doesn't increase/decrease with the volume. It makes no difference which source. When I give the amp to pre RCA a twist at the pre-amp, it will normally stop, so I assumed it was the pre. I emailed Roland about repairing it, but I'm not sure it makes financial sense to repair instead of buying something else. So, I figured I'd poke around and took it out of my system. Since it was out, I decided to fire up the amp just to eliminate it as the problem. Well, to my surprise, with the rca's still connected I got the same buzz through both speakers, just not as loud. Then I removed the RCA cable from the amp and got the same buzz at a very low volume thru the left speaker only. Now, my thoughts have turned to the amp. I know I could just pack it up and ship it to Roland or Rita, but I wanted to hear what you experts thought may be the issue and if it's something I can take care of. I bought this amp about 2 years ago with a fresh refurb and as my thoughts with the pre go, I need it to make financial sense whatever I do. What does this sound like to you experts? Thanks!
Main: TFM-45, Sunfire Tube CCC, Maverick DAC, NAD525Bee, Vandy 2C, Laptop
Office: M-500, CT-6, SDA360, Paradigm Studio 20, HRT MSII, PC
HT: Acurus 200x3, HK AVR247, Paradigm Mini Monitors, CC290, Micros, Velodyne DSL3750
Wght Rm: HR732, Paradigm Micros, Pure20
House: Denon AVR1400, Niles spkr box, SpeakerCraft Ceilings, BA A60II's, BA T930's, PC
Bedroom: Yamaha AVR, Panasonic DVD/CD chgr, Paradigm CC50/Micros, Yam sub.
Headphones: AKG Q701's, Sennheiser HD238's
Patio: Yamaha AVR, KLH In/Out Speakers
Misc: HK 330i