Or you can build your own transducers.

I use these built using a 8" woofer and amplifier from an old subwoofer. There are some difficulties during the building that I have learnt.

[Linked Image from component.se]

The image shows the underneath of one part of the couch.

I have had these for a couple of years and I cannot live without them. I also appreciate these much for music, not all people do. The infrasonic feel that they give would be very difficult to achieve the conventional way, and your ears would not like it.

Holodeck 2: DSP5k2SE+7k2HCSE, DSP33, G68J, 621, DD15, OPPO-203, VW790, ST130G3-120", TSU-9400/RFX-9600, PS4, SB3, Buttkicker-XL (DIY JL 12W7)
In Kitchen: P200Z, T-amp, Equalizer, SB2