With Andy and Craig (Forum members) stopping over this weekend, I got the itch to enhance the theater a bit. Craig had mentioned that he put his bass shakers on a board, and then zip tied them to the springs underneath his Berkline chairs. This got me to thinking that I would at least test zip tieing them to the springs themselves to see how that felt.
In order to avoid the bass shaker making contact with the center bar that reclines the seat, I had to put the bass shaker on the left and right side of the seat. Otherwise, when you plunk down on the seat, you would hear/feel the bass shaker hit the center bar. I initially tested just one bass shaker, but with it off center, I could tell. So I ended up adding one on each side. It definitely shook things up, but the energy didn't translate to the rest of the frame and back of the chair. I wasn't sure I truly liked the way it felt.
I had one chair that I had put a shaker underneath, mounted to a board that also mounted to the entire frame, before the theater was even finished, but I wasn't sure I was going to do it to other seats. I didn't like if you plunked down hard on the seat, you would bottom out. But given I had forgot that it was there, I felt no one would even no the difference. So I plugged that one in as well and noticed that with that method, the entire frame shook producing a similar effect as when the bass is really rumbling in the room. So I decided to run with that method. I had one spare board that I precut a while back so I thought I'd document it for anyone else interested. I didn't test Craigs method of mounting it to a board and then zip tie it to the springs, but my theory was that unless you physically connect to the frame, you won't transfer any energy to the back of the chair and or arms.
With the D-Box in the front, I was focused primarily on the enhancing the back row with bass shakers.
Here's the board I had made a while back with some angles cut out to help fit better underneath the seat.
Dimensions: 21 3/16" x 7 3/16" with 2 1/4" angles cut out on each corner
I used the Kregg Jig and 1 1/4" screws to connect to the frame.
The bass shaker was then mounted to the center of the frame using 1" screws:
Here's the board and shaker mounted to the frame:
It's mounted just above the brackets and the bass shaker doesn't physically make contact to the chair reclining bar.
Here's how I have the shakers wired although I have more than just two:
As of now, I still have one chair with two bass shakers zip tied to the springs, and two other chairs with the shaker mounted to a board and then onto the frame. This summer, I'll probably complete the back row. However, I may just do two of the four in case someone prefers the less tactile experience.
I plan to add an Insteon ApplicanLinc to the receiver that powers the Bass Shakers so I can have a single button on my touchscreen and remote to toggle them on/off. I'd rather not have them on all the time, especially if no one is even sitting in the back row.