Hi yall, I'm resurrecting my old thread regarding an issue I've had since completing my subwoofer build.
Specifically, I've always struggled with a distracting hum from my subwoofer. It was to the point where I would rarely turn it on and was very frustrated after working through what may be causing it.
Well, I happened across a Monoprice brand XLR to RCA cable on Amazon which would let me bypass the Art CleanBox pro that I had in-line between my receiver and subwoofer amp. I've never seen a cable in this configuration before and thought it was worth a shot to isolate the CleanBox as the source of the hum.
Sure enough, the hum completely disappeared when I pulled the CleanBox out of the system. Even with my subwoofer amp gain turned all the way up there is no hum.
Naturally this creates another problem since the receiver's subwoofer out jack doesn't provide the same signal level as I was getting through the Cleanbox. Do you guys know of another way to compensate for the loss of gain that the CleanBox was providing? Of course I could just turn up the gain on the sub, but i'm still not getting the same oomph as I was with the CleanBox.
I'm also wondering if I maybe had a defective CleanBox...what do you think the odds are of that?