Originally Posted by HiHoStevo
J.L. Thank you for the response...
Sounds like I would be better served to mount them directly to the seating rather than the riser.
So if all 4 seats in each row are coupled together would I need 4 per row or would 2 per row do the trick?
If I need 1 per seat then for my 8 seats then from what I have read I will need to order a second amp as I purchased the Dayton SA240 that was mentioned earlier in this thread. http://www.parts-express.com/pe/show...number=300-804
With 8 shakers you are somewhat limited in how they can be connected to a single channel amplifier and still all shake the same amount.
The shakers are 4 ohms, so all 8 in parallel would result in a load of .5 ohms... way to low for any plate amplifier.
If you put 4 in series it would be a 16 ohm load. Put two strings of 4 in parallel and you get a nice 8 ohm load and they will all shake the same amount.
The amplifier you linked to is rated at 170 watts into 8 ohms. That would be 170/8, or 21.25 watts per shaker. Since most people use less than that, you'll be fine with a single amplifier. (The shakers can handle more power before they reach their thermal limits and burn up, but they reach their mechanical limits way before that point. You'll be really close to their shaking limits with that kind of power.
I have a much smaller plate amplifier feeding 8 shakers in my theater... it is probably less than 100 watts, and it is plenty.