I have a 7700 and it's dead silent! In fact that is one of the reasons I went with Outlaw, no fan. I did have a bad ground-loop hum problem that was caused by my overhead lights but that problem disapeared when I moved it to another circut.

That is really strange, the 7700 is a quality amp and it should not be doing that. I am curious to see what those dedicated lines do, I have been thinking about doing that myself, would be great to have regardless.

Yeah, I'm having it done. The electrician had some free time come up tomorrow morning so he's doing the job then.

So we'll know soon enough if dedicated circuits fix the problem of the humming transformers or not.

Here's one question that I have...should the 7700 be by itself on one circuit, or can the Monster sub towers that I have go on the same circuit?

The 7700 would do well to be on a single circuit by itself, as in theory it could consume all of the current available in the circuit. In reality, I would be stunned to see a real-world case where the 7700 were driven to a point where that actually happened - you could most likely put the sub towers on the same circuit and be fine.

Thanks Gonk. I was more concerned about noise coming into play when putting them on the same circuit.

Yeah, I can't see a situation where the 7700 would go to full load for even the smallest moment, at least not with my speakers.

Thinking of leaving the Xbox 360 on the same lamp circuit that it's on now though. If it's dumping enough noise or whatever into the circuit to make the 7700 hum louder, wonder how it's affecting the other equipment as well.

Electrician came and installed the two circuits today. Yep, the Outlaw hum is barely audible now when I'm right next to it...at least for now.

Odd thing is that it still complains a bit when the SXRD TV comes on even though they are no longer on the same circuit. Wonder what that's all about.

It also appears that my total system distortion levels have dropped 1 or 2 db now that the HT is on separate circuits from everything else.

Glad to hear that the circuits are in and working well for you.

Keep in mind that those circuits all terminate at the same point (the electrical panel). You can see the effects of a slight, brief dip in current when a device on a different circuit draws a large inrush current on start-up (mostly if the circuits in question share a common leg). That's likely why you noticed that little "complaint" when the TV started up.

It appears now that the amp only hums significantly when everything else is off but it is on.

I'm still waiting for them to ship me out the DC filter.

Got the DC filter (actually a PS Audio Humbuster) and hooked it up to the amp with nothing else on that circuit.

The 7700 still was making a hum audible from my listening position.

So after all that, I decided to just return the Outlaw and keep the B&K.

For those who can put the 7700 in a closed cabinet, the transformer noise isn't an issue, but I don't see myself ever doing that with my Salamander rack, particularly since I have my vertical center channel in the rack.

At this point I was just too sensitive to the hum of the amp (although my girlfriend also hears it, so it is there) whereas the B&K is dead quiet from the listening position.

Since there was very little difference in price (about $150 less for the Outlaw since it was B-Stock) as the B&K is a demo clearance model (with full 5 year warranty, same as the Outlaw) and otherwise no real difference in performance, I'm keeping the B&K.

Would I live with the hum of the Outlaw if I couldn't get a quieter amp for the same price? Not sure, but I don't think it's something that we should have to live with in a piece at this price point.

I grudgingly accept that the Xbox 360 is noisy at the $400 price point, however, I'd gladly pay another $400 for a quieter 360, but at $2000, mechanical noise is not something I was prepared to put up with.

Oh and Outlaw support in general and Edward specifically has been great through all this.

Thanks for everything guys.

At least now I have a nice set of Outlaw balanced cables. Absolutely no complaints there!