Automatic Volume Control

[Diver14]

Hello everyone, I got to put in a few hours on the water today testing the new multi pump ballast system and all seemed to work great. With this project behind me I am looking to add an automatic volume control to my boat for my next project. I find I constantly have to signal the driver to turn the radio up when riding. I have found two options each have their strengths and weakness'.

The first is the one that seems the simplest in its design. http://www.hsetrident.com/html/rvc_info.html. It is RPM based and I like that, the only downfall which is a big downfall is the fact that it only has one output and I have three amps and like to have control over each of them. This one is around $250

The second seems like a much more complicated design which I believe will be prone to being inconsistent due to its method of sensing speed. It seems to be based on the level of the boat and possibly some type of accelerometer. It has a better system in controlling the volume since it attaches just like a remote would connect and simply adjusts the master volume to the entire system. The link for it is here. http://www.boardstop.com/product_inf...roducts_id=926 I have found this one for $189

My question is do any of you have any experience with these or any other similar devices and if so can you give me any feedback on your experience or opinion with them.