I just bought a circular metal sub cover for like $10. I throw everything in the trunk with no worries.

Sub covers

 

http://cgi.ebay.com/ONE-12-CAR-AUDIO-SUBWO...A2%7C240%3A1318

just got the grill above and screwed it in

 

I got the 10" from PDFAB's on e-bay and I love it with my 10W3x3 driven at 300W. Construction quality seems excellent. But I don't think these boxes have enough volume for a decent 12"?

 

^^ They're close.

You can throw a Stereo Integrity Mag v4 in one with an appropriate amount of polyfill and be good (rec 1 cu ft, min about .9 cu ft with poly fill) up to approx 1000W (I wouldn't push it that hard, 300-500 would be plenty).

 

I should of went with a 10 inch sub & Ebay box instead of the Infinity Baselink II.

 

Box works great...the sounds is amazing now in my car!