All good advise. I am going to be putting in two electric hatch actuators this winter. I plan to mount a box on both sides of the engine with 4 10" subs in them. This way I can still hear everything while moving, and when I am stopped I can open the hatch and really hear everything. I am not looking to buy cheap crap. I just didn't know if any of those brands were any good. I will be running 2-4 batteries for the system alone along with the 2 I have dedicated for the engine now. The boat is 27 feet long, so I have the room for way more than I am putting in. Thanks again.