Yeah,
Im running Three Tens in the back hatch in one Mono fiberglassed box. and havent broken the rear hatch yet. However I dare not have all windows closed at the same time, i would difinately blow the windows then. I am going to try and replace the rear hatch glass with lexan, so i can take the car to a DB Drag even and measure my SPL. Ill let you guys know how it goes.
Later,
TurboBladz