well since the DD is unusable,plans will have to wait.
I was planning on a DD 12" horn with 50hz loading, F3 of 40hz.but larger mouth so 104db/1watt .
30hz plans later on...as i have some costs to cover at moment-ive been given a car-and need to pay warrant,registration,it has a little rust,gota fix that... :-(
good things take time..and now its 6am,time for sleep :-)
cya Bill!