Well, after a couple of months I finally got my cables together to connect my BFD and move both subs to the corner,A Paradigm Servo 15 and a Von Schweikert S/3.After connecting the BFD between the Ref 30 and the subs I noticed a loud hum coming from the VSA sub none from the Servo.I started to trouble shoot switching cables(brand new Cat cables from BFD to subs)Monster cables from the Y from the Ref 30 to the BFD.I put cheater plugs on the BFD and the Sub still could not get rid of the hum.After 30 minutes I deceided to take the BFD out of the path and guess what? No hum.I had the BFD plugged in to a Vansevers Model 85 line conditioner and noticed a hum coming from the 85 which it has never hummed. My equipment is on a dedicated line (20 amp).Any ideas from the BFD gurus? I'm stumped.I used the mono adapter plugs so I'm lost.I'd love to EQ my subs after spending a couple of hundred bucks on cable. Thanks, Steve M.