This has been around for a while(at least 4 years that I know of). Arctic Spas has had a system called the Aquatremor that use transducers attached to the fiberglass shell and basically make the sound come right out of the water. You can get some EXTREME lows with these. Ipod connector as well! http://www.arcticspas.com/index.php/en/show_content/3/53/
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This has been around for a while(at least 4 years that I know of). Arctic Spas has had a system called the Aquatremor that use transducers attached to the fiberglass shell and basically make the sound come right out of the water. You can get some EXTREME lows with these. Ipod connector as well! http://www.arcticspas.com/index.php/en/show_content/3/53/