You wrote "THe boat comes stock with a Polk 10" free air sub behind the driver. I hate to waste this space and am thinking about putting in a JL 10" infinate baffle sub and run in off the WS SYN Micro. Is this a waste. Should I just put a fake cover on this spot and forget it?"
I have a JL M10IB behind the drivers seat in a large compartment, it's amazing how well it does, puts out just as much as my other M10 in a sealed box on the other side of my boat. Do yourself a favor and put a IB JL sub in there, you won't be sorry.. Putting a fake cover in the spot would be a huge waste..