I would think another option would be to use the AC wiring itself as the distribution system, which would also inherently filter out hum. Alarm and environmental control systems like X10 already use such technology. The power companies already use such technology to distribute broadband digital data via AC networks. A relatively low density data stream such as an audio feed for a sub would be fairly easy to accomplish.
The wireless would be a no brainer. The buttkicker is chopping on the right tree, but needs to be smaller; I could see a unit that plugs in in-line with the power cord (wall wart and main unit combined) as being more desirable.
A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more!