Another update: I've moved twice in the past couple years so cables I've been hording over the years are all in different boxes, I'm sure some of you have done this lol. Anyways, went out to the garage and tore into a few and found another Y adapter. This one doesn't have a name on it but it looks like a Bettercable or Cobalt cable, those 2 along with Outlaws interconnects are the 3 brands I was messing with 7 or 8 years ago when I bought the M200's and 950.

Ok on to my point, the hum is a thing of the past! The only variable I did NOT remove from all previous tests was the Y adapters. I was so busy with trying different outlets and conditioners that I never removed the adapters entirely.

When it's just the M8 connected to LFE out, no hum. Using the y adapter I found in garage(and of considerable build quality), no hum. Using the Acoustic Research and Monoprice adapters, the hum returns. I won't question why or how but I'm thrilled. I may buy another M8 or a bigger model for the bigger room. The Supercube 1 is nice, actually excellent for 30hz, but something that can go lower with more authority might be needed to help really pressurize the room.

*Thanks to Scott for emailing me and wanting to help. I've been away from the Hideout for a few years but plan on sticking around for a while.

AJ and Durask, enjoy!

*Oh and the sub still picks up the oldies station when phase is switched but again, it's set to 0.