I noticed last weekend that while out on the water If I crack open my passenger side seet just a bit, the bass creep's out much better and dosent vibrate the hell out of my carbon fiber glove box lid, It seems as if the built up air pressure cause's lot's of rattle's/vibration when a heavy bass note hit's, So I decided to cut some vents in my passenger side seet. Here's the latest
I think that Pheaton did this in his boats too. He covered the new "grill" with material that matched the interior and it looked stock.
I don't have any pics with me, but I went a little more "ghetto" route and used 3" ABS drain covers around the base of my observer's seat to do the same thing. I did the round vents because I had installed a round Perko locking latch on the base of the seat to secure it. The vents matched in size and color.
Same thing on the SV211's but we don't have the kick plate you do (only the actual seat is hinged). Clubmyke and I were trying to figure out a way to convert the drop in cupholders to a bass vent. Yet another potential mod for you to work with.
I was planning on installing a white marine speaker grill on the front of the passenger seat base but I ended up installing the sub in the driver's footwell. The second sub will probably go under the little back seat base if I ever around to installing them. For now I have been boarding in my free time instead of wrenching.
I know Grant... I can't hang with you guys with cheesy solutions like that but I like to keep it simple (K.I.S.S. - keep it simple stupid, that's my agenda).