Yep,
First, I need to know if you are using a receiver or separates......... are you using a pre-amp/processor??
If it's an amp, does it have two channels or is it just one channel??
If possible, I'd keep the sofa and the chairs on separate circuits so you can control the level of bass going to each. You will probably want to hook up the shakers in series to do that. I'll cover that but,,,
I need to have some answers to the above before we can go further.
