New Rotel RB 1080, Has A Hum

[johnnyr]

I hooked up my Rotel RB 1080 last night to my Monitor 11's and it has a hum coming through the speakers. My RMB 1075 only made a hum when the amp was on and the reciever was off but the RB 1080 makes a hum when the reciever is on and I can here it when the volume is low. How do I get rid of it I read on another forum about a cheater plug but I don't know what it is. Both amps are plugged into the Monster surge protector, I unplugged the Rb 1080 from the protector and plugged it into a seperate plug but the hum was still there. Hopefully you guys can give my some advice on how to fix this, I'm pretty bummed out that the new amp is makeing noise. I don't know if this matters but it is the new version 3 with the four binding posts so I bi-wired it. Please help guys. Thanx



TV-Sony 40KV-40XBR
Cable-Sci Atlanta HD3100
DVD-Denon 1600
Reciever-Harmon Kardon 7000
Amp-Rotel RMB1075
Fronts-Paradigm Monitor 11's
Center-CC-370
Rears-ADP-370
Sub-PW-2200
Line Conditioner-Monster HTS 3500

[Aussie Geoff]

John,

Welcome to our world. You have a common problem related to the fact that the RB-1080 will be the first 3 pin grounded amp in your HT - so any minor variaiton in ground current will want to "escape" through it - hence the hum.

Try this link LINK1
and this link LINK2

Looking at your set-up there's a 90+% chance its comming from your cable. Easy fix as per the postings

Geoff Costello