I hope this is the right place to ask and you guys can help me. I obtain a strange noise, most likely originating from my amplifier. I tried to record it with my phone, so the quality is not really good. Have a listen here.
I am using a Technics SU7700K. The noise is strongest when listening over the phono mode but still notable in tuner/aux mode. You have to put to volume near maximum though. I tried to unplug everything (!) and the noise or signal is still there. I tried to use different power sockets and first I thought is was gone...but then it was back again. I unplugged the speakers and checked over headphones. Still there. I even tried to remove potentially disturbing signals like WiFi or mobile phones. Still there. So...I guess I can safely say the problem is within the amplifier. But I still have no idea what the problem might be. Hope you guys can help. Maybe someone had a similar problem!?
PS: Sorry for my english, it's my second language. If anything is confusing please ask and I try to clarify. Also, thank you very much for your help in advance.