Originally Posted by MrXtian
Thanks so much, Treads. Yes, I'm using the RCA connection on my Sub, so speaker connections there are not active.
I have only one sub out on my AVR so I will use a splitter. If I do this will I have to buy an inline 50hz crossover filter for my bass shakers? Thanks.
You already have your answer about using the speaker-level outputs of the sub. If you use a Y-splitter, you'll still need an amp to drive the shakers. Depending on the amp you get, you may or may not need a 50 Hz filter. Some amps have that functionality built in, (Buttkicker BKA-1000, Dayton SA-1000, Crowson C-602, etc.) Others do not. Select your amp first, then decide if you need the filter(s).
However, I'll throw another wrinkle at you.
If you use a Y-splitter for the shakers, and your receiver has any flavor of Audyssey, (or any other room correction), the signal to the shakers will contain the room correction EQ that Audyssey sets for the subwoofer. Certainly the shakers don't need room correction EQ. They would be much better off getting an uncorrected, "native" signal.
To work around this problem, I have my system set up so that I use the analog subwoofer output from my BluRay player as the signal to the amp for the shakers. In most BluRay players, the analog subwoofer output is active, even if you're using the HDMI output for the audio signal to the receiver. In the BluRay player, I set the Bass Management to: Subwoofer = Yes, all "Small" speakers, the lowest crossover available, the shortest Distance setting possible, (while leaving the speakers at the longest Distance setting possible), and the output level to "0". These settings redirect all the bass from the main channels to the subwoofer output, pre-filter it before the shaker amp, and insert a delay that closely matches the delay of the rest of the signals through the receiver. (Note that these settings only apply to the BluRay players analog outputs. They have no effect on the HDMI signal, and the Bass Management you set in the receiver will be applied to the speakers and sub.)
You now have an uncorrected signal for the shakers. There are a couple of downsides to this scenario: 1. The Master Volume Control does not control the level of the shakers.; 2. the shakers only shake when you're playing BluRays. I don't find either of these to be significantly problematic. I always listen to BluRays at fairly high levels and I don't really need to adjust the shaker level to compensate for lower sound levels. I don't really need my transducers with cable TV, which is the only other source I have.
Good luck with your shaker system.