Amazon.com has a Buttkicker BUTTKICKER-LFE Low Frequency Effects Shaker for $181.99 with Free Shipping.
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- Nominal impedance: 4 ohms n
- Power handling: 400 watts min. / 1500 watts maximum n
- Designed specifically to take advantage of the .1 and LFE channels n
- Can be used in couches, theater seating, platforms, and any type of structure n
- Frequency response: 5 – 200 Hz