speaker hum

Does anyone have any advice please? A week ago, I purchased a hifi receiver and on connecting it up, found that it suffered from an annoying hum in the left-hand channel, while the the right hand channel was much quieter. I tried every remedy for hum that I could think of and also tried...

My Sanyo turntable has a lot of hum (especially after a certain volume level), do you have any solution for that? (Grounding is ok) PS. sorry for my bad English :/

Hi all, first time posting so apologies if this is in the wrong place, I'll try to be as detailed as possible. I have a Cyrus 6XP amp paired with some Revel Concerta 2 speakers. The inputs are a Cyrus CD player and Rega P3 turntable. The speakers and turntable are relatively new and I've been...