I got the shakers installed in our new theater seating (Palliser) on Saturday night. It was a tight fit but I didn't have to make any modifications like I did on our other chairs. With the previous set-up the driver was mounted to a board fastened across the lower back area. Now I have them fastened to the back of the seat portion, on the opposite side of the board where the seat springs attach. It tends to transmit the vibrations through the springs so it is felt more in the glutes and down the legs. Whereas the other set-up had a tendency for vibrations to travel up the spine. I'm not sure which is better but it is definitely different. I do prefer the new set-up with music though. I only have 2 chairs wired but I'm planning to do a couple more. Unlike MeanGene I only use one driver per chair. That seems more than adequate, for me at least.