- Oct 11, 2004
I have a problem with the amp im using as my headphone amp. Its (I think) an early 70s electro voice amplifier. Its small, and is usually used for speakers. I have found, however, that it sounds exceptional with headphones. For some reason, I just love listening to this thing instead of my fairly crappy JVC RX-552's headphone output (although it drives my speakers fine). I compare the 2 like this. The JVC sounds really "refined", almost mid scooped in a way. The electro voice sounds full, and its much more fun to listen to it. There is a persistant humming, however. It sounds like it might bt 60hz, which makes me think ground problems (this amp only has a 2 prong plug). There right channel used to be bunk and only buzz, but I fixed it by taking the whole thing apart. Found a broken solder joint and blown fuse. Id really like to fix this humming, itd make this amp really shine. Im thinking this. On the back, the diagram says this one screw is "system ground". Im thinking I should mod this to a 3 prong plug, and ground the unit. Would this help the hum?