Using hollowed interior panels as a subwoofer box? Any thoughts?

[crazypete]

I make sure that my car looks bone stock. Only the truly discerning eye can tell that the suspension is a bit lower than it should be. Inside, looks bone stock. I discerning eye could see that the heater controls are missing. I replaced the knob panel with old vhs case plastic, the slightly textured kind which blends with the oem vinyl perfectly.

No thieves stepped up to the plate yet to gank my stock ford radio. Under the dash though, sits amps and cd changers.

Now, does a subwoofer need the speaker half to be on one side of the space and the tail to be on the other? Would a woofer function if you were to completely enclose it? I am generating air pulses. I am now thinking that under the 1/4 window interior panels is the place to go but you are TOTALLY correct in that sleeper/hidden look is the way to go.