Firstly, Kappa's EBP is about 105, which is roughly in line with most of the other woofers used in ten pi speakers. There might be slightly better choices, but my experience with the Kappas has been they are fine for horn loading.

I run my ten pi's at 1.5 kHz instead of 1.6 kHz. I know it's a minute difference, but I have been running them fine at that frequency. I just thought I would mention it, because that is what Eminence recommends for the minimum cutoff.

Adam