Has anyone installed one of these on there boat yet? It adjusts the volume to the RPM's in the boat. Its a great concept, when you get to your wakeboard/surfing speed you press the program button and then when you throttle down to pick up a skier, it will lower the volume in the boat. It also has a 3.5 second delay to avoid bumping the volume up when intermitent throttle is necessary.
I was told they work very well, wanted to find out if anyone has had any experience with them. Below is a link to access there site.
http://www.hsetrident.com/