Yes... The JENSEN 15-LL was a great woofer in the K horn. Paul klipsch & George Ashworth spent a lot of time making that model work. Using DBP on outer surround to lower complience. Im suprised you have that woofer. Who is George ASHWORTH? Thats another collegue who helped in the early days of woofer problems. Remember speaker manufacturs back then were not interested in making special woofer for the KHORN. It was AFTER this STEPHENS took the P 52 & developed the P 52LX2 for Klipsch. And the linage went on from there. It wasnt easy back then for Paul to make each of these woofers to work right & also had to shellack the cones to keep DBP from creeping down into cone. How do I know? I own 155 tech papers & letters on the development of X1, X2, X3 Khorns between Paul Klipsch and Ashworth (chemist & scientist) Who gave support in those early years. These papers go into great detail about those horn developments, high frequency horn development, & woofers and drivers used. As yet I havent published them. I dont know if I should turn them over to University in New Mexico .( Klipsch archive) or what. These are valuble I know. At the moment I still hold on to them undecided. My wife knows not to destroy them if any thing happens to me.