Fostex 167E in MLTL cabs crossover-less.. The first speaker I built on my own (circa 2000) so I kept it for "posterity" sake so that it reminds me where I actually came from. I built everything you saw from my horn setup, one way or the other, speakers, electronics, crossovers, etc.
Getting back to the HD650, I am in agreement that this HP is a true bargain for what it can do provoking the emotions of the listener. When I am too lazy to fire up the main rig, I go straight to my Schiit/HD650 set up and I do not feel cheated at all. In fact, I am happy for what I spent particularly for the HD650.
I agree...You can easily get a better (read more expensive rig) and yet the 650's and a good tube amp will hold its own very well...
BTW, nice job on your builds. What driver did you use in the Fostex?