Newbie need help taming response peak

[kendomusic]

I am trying to build a 2 way system using a 5 1/2 Peerless VLine woofer and an HiVi 1.1 Tweeter. I am using Jeff Bagby's PCD to design the crossover. The peerless woofer has a rising peak at 6khz. What filter do I use to tame it? Thanks for the help.

[Paul W]

Series LCR connected across the woofer driver terminals (after the low-pass).