You know in Goonies at the end when the pirate ship sails out and the cop says "holy Mary...Mother of God!"...?
Well that's sort of how firing these things up for the first time was like!
First some finishing details.
Rat Rod passive XO, low pass around 125hz
Mounting the drivers
Dual opposed configuration
XO installed and split to top section
Did some quick XO tweaking and ended up with this, bass is about 3-5db down and I'm going to try Biamping to even that out before resorting to active.
Initial impressions...WOW, this is the type of speaker that gives you a physiological response to music, I find my heart rate and pulse raising listening to my reference music. Bass is prodigious, like shake your hair and other body parts powerful, SPL is effortless, I hit 50% volume on my Adcom preamp and it sounded like the house was rattling from the inside out, volumes easily 115db+ at 1-meter, and that's on less than 300 watts or so per channel (Adcom GFA-555).
Fun stuff! Will keep playing with them!