I've searched this forum and found dozens of posts regarding the deaded buzz. The buzz in my system is very faint, and you have to put your ears within a few inches of the speakers to hear it. Additional info: 1) I had a Lutron dimmer that was definitely adding some buzz, and once I removed it and put the single pole switch back in place the buzz 'pitch' was reduced. 2) If I disconnected the satellite coax cable from my 811 receiver the buzz seemed to go away. 2) Since I just had Dish installed (my close friend is one of the local DISH/DirecTV installers) I have one dish for the locals and a DISH 500 on the roof. Before there were a few splices in the RG6 where they were joined by couplers and he was using the existing quad shield RG6 for half of the run to the receivers. Today he pulled some (2) new RG6 (Perfect Vision 75 ohm w/ pure copper conductor) cables that run from the LNB's to a ground block ( http://www.partsexpress.com/pe/showd...number=180-065 ). Then it's a solid cable run to the 811 and the other run connects to a 2-way separator and has (2) runs that go into the master bedroom to the 625 DVR (Dual tuner). Then one line runs from the DVR to the spare bedroom. He terminates all of the ends with a Digicon DS6 connectors ( http://www.solidsignal.com/prod_disp...PROD=WMFDIGI-S ). 3) The buzz is still barely audible at this point, so I disconnect the coax from the 811 but you can still hear the faint buzz. This buzz is moving around....grrrr..... 4) Since I recall reading that sub amps can introduce buzz I decide to disconnect the SVS BIF box ( http://www.svsubwoofers.com/marchandsubsonic.htm )and the buzz goes away for good! I then tried connecting the S1000 directly to the sub out on the 3803 using a with my Blue Jeans 89239 cable & rca phono adapter to allow it to fit in the S1000 and the buzz came back, so I tried a SVS / Bettercables amp interconnect rca ( http://www.svsubwoofers.com/parts_bc_inter.htm )and saw no change.....stupid buzz is still there. The SVS BIF box does not appear to be part of the problem. In a nutshell it looks like the problem is no longer the satellite coax, or my dimmer switch, and looks to be and issue between the 3803 and the S1000 Pro amp. I would still like to use my SVS BIF box as well. Is this really a ground loop? What are my options? I would really like to get rid of the buzz once and for all!