I own a 1512L for years, and am very satisfied with its sound and power, nevertheless they are quite expensive for what they are. the finish is far from meticulous, and I burned a lot of tweeters (Jorg gave me some) before realizing mine has NO FILTERING !!!! (a joke, said a tech I know, happily I don't have a big need for tweeters after all). I got it for very little money so it is fine, but otherwise won't be very pleased, if I had put a thousand in this one.
edit. It has a very good sensitivity. 103db on the paper I Believe.