theres a friend of mine that installs systems on his free time. does quality work. he offered me to give him my subs - 1208t - so he can sell them and give him 135 bucks for a trade. the trade is 2 15" L7's. i know their flaws in the cone structure and the structural design.... my question is,,, is it worth the trade. i got my box and the two 1206t's for under 300. the 15's come in a ported box....................need help here