alright right now i have my brothers 3 10" WO's in my car, and they pound good. Powering them is a rockford 360a2. Well I want something of my own. I found a deal on one 10" Solo L7, in a box. I am wondering how this will compare to the JL's. Will it be as loud, or louder, or what?

 

2- L7's will be much louder, 1 will never amount to 3 10's If your bro's 3- 10's have enough power going to them that is...

 

considering boxes for each setup are equally well suited for each sub, and the power sent to each different set of subs is also correct, 1 L7 won't be louder than those 3 10" W0's...

 

I agree. Ported L7's are loud, but to make up three 10" cone area's would be a hard match.