April 5, 200916 yr Not positive on this, but it may be:Extreme Lead: ONLY choose this option if you plan to use the woofer for SPL ONLY applications. This option tends to yield really bad tinsel slap and rubs holes in the spiders (especially on the 10
April 7, 200916 yr Not an issue any longer as we switched to the integrated lead pack a few months back. It simply adds another set of leads to each side.Thanks,Scott