Lots of replies thanks! And here are more details, sorry about that. I drive a 2005 f150 2 and 1/2 door. It's a stealthbox containing one 10 w3v3 with a rating of 500 watts rms taking only 300 because its 4 ohm and is wired to an mrp500 alpine amp. It's ported here is the box:
JL Audio Stealthbox Single® (Black (matches cloth interior)) Custom-fit ported fiberglass enclosure with 10" W3v3 subwoofer Fits 2004-up Ford F-150 SuperCab and SuperCrew trucks at Crutchfield Signature
I have to say one thing, please don't bash my choice of equipment. I know it is expensive and i got it for 500$. Still a lot but i wanted it to sound good and look good. So maybe i am getting everything out of my system, guess JL is purely sq. My friends had best buy crap, brands i haven't really heard of with 750 watts. Here is the thing the amp and sub together was really cheap like 200$. All systems i have heard sound bad but are much louder, i want both unfortunately. I was thinking of adding another 10w3v3 in a custom sealed box in the center console. Would that really help. Dynamat? And i am amplifier car door speakers in a few weeks if that ,means anything. Would it be better to fit a w7 there and sell stealthbox or the two 10w3v3's?