ok ive had it with sunfire subs.they sound awsome but they always have a ground loop issue. I love this thing but i have had it. i have 3 other subs in my system that dont have this problem. i know its a ground loop beacuse we used to be a sunfire dealer and almost every one has a ground adapter lift on it. now i dont need to be flamed for that beacuse it is suggested in the manual to remove the hum. call sunfire tech support they will tell you the same.however i dont share their philosopy and refuse to do that in my home with young children. Btw it goes away when the input is unplugged.anyway its in great shape except for a small chip on top where a candle rattled off the table on top of it. i colored it with a sharpe and you can barley notice it.i have even mink oiled the drivers as bob recomends to lenghten their life. this thing was 1800 new a few years back id like to get 900 for it.. i have the box and manual. the box is not the original but it is a replacement for shipping from sunfire.

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Vinny, did you try ringing (i.e., cutting through) the shield at one end of the interconnect cable, so the grounding plug is not paralleled by the shield?

can you please be more specific? i have never heard of this.

Imagine soldering plugs onto a length of shielded cable. Step one is to strip the jacket back far enough to expose the right amount of braid, strip back enough of that to expose the inner conductor's insulation, and enough of that to expose the center conductor.

Now, imagine that, at one end, you strip the shield away along with the outer jacket, so there's no braid to solder. Now you have a cable that won't contribute to ground loop, but the shield will still be grounded at one end, whichever end sounds quieter.

Now, if you already have a cable which has molded ends, and/or you can't/don't want to open a plug, you can carefully cut through the jacket and shield near one end and accomplish the same thing. That's what I was talking about.