well, I already have one and just now installed the stereo in my boat. I used the splitter and the fm works great in my driveway, we'll see what happens on the water. I also connected the new stereo to a second battery that i will run my spreader lights and electronics off. my VHF is still run to the main battery so untill i reinstall the second battery I wont know how the vhf reception is affected, I will post and let you know how it works, I didnt pay shakespears price of almost 80$, THIS ONE COST 29 DOLLARS online