Thanks for your answers!
1) I figured that no connector is better than any connector (especially since the "best" connectors cost ludicrous amounts of money) I have some of the plastic RCA tips that came with the 47 labs OTA cable kit, so DIY hardwired interconnects should be easy. I even have a friend that's a jeweler who'll pull some 24 awg pure silver wire for me.
2) 16v? awesome. I just have a 12v 7.2ah SLA for now, but if I decide I like the amp enough to have the Li-Ion built, I'll make sure to request that's it's 14.6v
3) seems pricey.. I'll hold off and see how it goes
4) I ended up getting a 4p3t heavy duty switch so I can simultaneously switch on two charlize2s in the same box or charge the two batteries connected to it. (with a center off position)
As to your question about the eXemplar Horns. I love them. The tops are 750hz up and perfect. the bottoms are 750-135 via the front horn and 135-50-ish via the rear porting.
I have zero complaints from 135 up, the rest is very room dependent, and unfortunately my room is far from ideal. My solution is a Bruce Edgar Seismic Sub.
it gets RAVE loud from the 2a3s turned up halfway, so 3.5wpc is probably plenty, but I'm dying to find out what they do if I give them 10wpc. John Tucker powers his with 300b amps, so he's got 8wpc and says that it makes a big difference in the bass.
I'll laugh my ass off if the little charlize2 bests my John Tucker built 2a3 amps. (I'll also make a pretty penny selling off these rare beauties!) If that's the case, I'll definitely by a second and build one box that's a monoblock pair to bi-amp my speakers (20wpc, wow!)
What do you use as your power supply? Also the charlize2 only has the two caps in between the air coils, right? (1000uf 16v), or are you referring to the tiny 47uf 25v caps?