Hi Marsellus,
If I remember correctly, the td-1s listed at $4200.
Mine are the install version, with flypoints but no track.
They were demos and I got a good deal on them.
About a year ago I saw some used, with track and they were asking $1600.
The boxes are quite solid, actually built in Candler.
Am pretty sure the drivers are off-the-shelf.
Ivan Beaver would know - he installed a bunch of td-1s.
The boxes are 30 degrees wide x 60 degrees high, that's why I was suggesting three per side.
You could probably do two per side if you had a good front-fill.
I would consider selling mine and going with lighter boxes, but I don't know of anything out there that goes that loud, sounds as good and is affordable.
Alternately, a couple Yorkville U15s per side might work, or TX8s definitely would.
There's a pair of U15s at WWC if you want to hear them.
Thanks and good health, Weogo