Hello,
I will try to briefly answer some of your questions. Feel free to call and we can discuss the details at length if you like.
1. Same. We can't make the box any bigger than it already is. That is the nature of a "stealth" box. You don't always have the luxury of just making it bigger whenever you want because of the restrictions of where the box fits. The volume is pretty close to what jl says and the guys that have the 12w7 in that box love it. Also at least we do provide specs of our box. JL does not, nor can they even fit a 12w7 in theirs. So if you compar our box with a w7 to jl's with a w6, our box with the w7 will be louder and still cost less.
2. We are not "various" companies though. We are the best mdf manufacturer in the industry and that is why people buy from us. The w7 upgrade version of our box includes a double thickness baffle and tons of extra countersunk screws in the box to ensure years of abuse. It's not gonna rattle apart like any of those other low grade chines built boxes like Atrend, Audio Enhancers, etc, etc. I have a w7 in a ******** built stealthbox in my own camaro and I like it a lot.
3. I don't know exactly what you are referring to by universal. Do you meant cutout size? Our standard cutout size for 10" is 9-1/8", For 12" it is 11-1/8". If you need something just a tad different, we can custom cut it to suit your needs if you tell us. If you don't tell us, then you would get either of our standard size holes.
Since JL subs have such wierd cutout sizes, we have put those in our menu as very specific items to select if you plan to use one of those subs. For JL 10w7 the cutout is 8.75" exact. For JL 12w7 it is 10.5" exact--just like manufacturer suggests. So when you select the 12w7 upgrade option on our site, the box will have a 10.5" hole and have the added beef as listed above.
Our large stealthbox truly is a nice box and I think you would enjoy the box as much as you'd enjoy the savings over the jl version.
