Hvaent heard anything like that. Why do you want to get rid of L7s though. Another company that does not get enough said about them is Memphic Audio. They have some subs that slam. Check out their site
www.memphiscaraudio.com. Find a retailer near you and go sheck out their equipment. The prices are unbelievable beacuse they dont have a name yet like kicker or jl but they are 100% made in the US and will rival kicker and JL quality without the price. Just a suggestion