Just off of specs it looks like the dali's go down to 51hz and the classix II's go down to 35hz. To me thats a good thing. The classix also have higher sensitivity.
Problem is they are rear port so if you are up against a wall thats no good, would have to build front ported cabinets.
I still want to build some just to build something because Im so freaking bored in life. I think they would be a speaker you could use for the next couple decades. You get a challenge of building them which is good if you have the time. I may just pull the trigger and order some myself. Ive wanted them for a long time.
The way DIY works is you are going to end up with a speaker thats probably competes in the $500-$1000 range with the classix II's.
- 6 BA CR6 array center channel, QSC AD-S82 L/R, 4 jbl 8330a surr , 8 jbl 12" subs w/Inuke 6000. JVC rs420, Denon x4000, Sony x800 -