it depends on the amp if your only gunna run 1000-1500 watts i would get the L7s if your gonna run 1500 or more get the BTL i have 2 L7s in my car right now and i love them they hit really hard but i only suggest getting them if you have had experience with prior systems L7s are not noob woofers if you dont know what your doing they tend to blow just my 2 cents