has anyone cut out the rear decklid in the back of the G3 teg hatch and mounted a free air sub there?

 

I was thinking about doing that on a G2 teg, but there would be a lot of rattles going on if you did that without doing anything to hold it down and insulate it.

You should cut it out, put a few layers of dynamat on the bottom. Then it should sound real good, maybe make an inclosure to the back side of it also about 1 cf so you would have cleaner base.

I also did an free air setup in my 93 civic coupe in back of the rear seats with just a 10" and a MDF plate inback of the seat. Sounded good and couldn't beat the price... almost free (wood 5$ + $5 carpeting). But didn't hit that clean without an inclosure to seal it off. The trunk a very good at making bass sound louder though.