I have these and they work great! You probably have speakers already, but if you don't or are replcing them check them out.
The Samson 720™ tower speaker system was designed from the start with wakeboarding in mind. This system uses our patented 720 quick release "wireless" mount and your choice of Focal, Infinity or JL Audio true components that are neatly packaged in our acoustically engineered enclosures.
When you first look at these speakers, they appear to be wireless. All of the wiring is hidden inside the tower and mount. The wiring connection is achieved by a male/female headphone type jack machined into the center of each speaker and mount. This design allows the speaker to spin around as many times as you want without ever winding up the wires.
To reduce the risk of theft, the 720s™ quick release mount system allows you to remove the speakers in 5 seconds by pulling on the spring-loaded locking pin. This allows you to quickly remove the speakers for safekeeping and it makes the tower easier to collapse for storage by removing the added speaker weight. All of this is achieved without ever touching any wires or using any tools. The quick release mounts are machined for the exact tubing size-not a clunky universal style.