Not enough weight or power to worry abt it..ive ran heavier subs with more power on single baffle no problem..i mean its no big deal to add a second baffle tho so if u wana waste the wood go for it ..id use the extra wood to build a false floor, battery box or amp rack.
Sorry dude, I live out in the boonies, and my mobile gets sketchy from time to time.. Yea, you dbl baffle the plane (board) that the sub/s mount into. And for a couple Type "R's" firing up, in a custom HO box on 1.5-2k in your daily ride, it is not a waste of time or wood IMO....