"Mids: Fostex FE107, horn loaded with 18" axial length, 30-degree included and a 2" throat."

I just finished a little 6L dual port FE107E. Right now I'm using it full range as an office system. I was wondering as to what crossover points are you using your horn? I really like the mid-range of this speaker.
When used in your system as a horn loaded mid, is it capable of "party" levels? There is just too much break-up when playing high volume levels at full range for me to tell if it's worth putting this driver into my main system.

Is the:
"Bass: JBL 4560 cabs loaded with EVM-15L EV's " the same ones that you had in MD?

Regards,

Pete.