ok the prob with the box i have now is it pops the air pops out the ports because its trying to suck in alot of air but cant before the bass hits again so its goes pop pop pop you dont notice it in the car because the trunk is so dead and it doesnt like to transfer any of the base into the cabin of the car. And I was running it at 200W but it hardly even hit at all in the box it just didnt work so I am running it prolly closer to 400W now and it pops all the way through the power range just puff puff puff out the port holes and i do want a sealed box but I want to have it rigid so that it moves more air into the cabin of the car. But oh well jsut installed one of my components speakers from my old car. Sounds better than what both front speakers sounded togeather but holy [censored] its a pain to rip apart that front door. its funny how I sorta made the 5.25" sub fit in that hole haha I dont like to spend more money than I have to oh well cya