I just joined because I was very impressed with the plans, especially cubo cabs which seem very intelligent design to me (with my dusty old MSc in acoustics). I am building up a small rig after being out of sound amplification for 38 years and decided to build a pair of Cubo 18s to perform the bass duties (Tannoy VX12s do the mid & high with a bit of help from a pair of 60 degree horn loaded B&C DE250s to extend the distance of propagation above 2kHz: I intend to cross over at ~150Hz and 1.6kHz.
I am not very good at reading the plans, though. I think the "under construction" photos here freespeakerplans.com/kunena/16-bass/21333-cubo18
are very helpful. If people who have built cubo 18s are willing to post informative photos of their construction here, it would be really great. I am interested in details such as the kind of screws and glue you use as well.
Significantly, I went to two timber specialists here in the Belfast area and both told me that Baltic plywood was now "impossible to get hold of". They offered me alterntive "good quality" 18mm ply, but would not commit to it being void-free, which I explained was essential. Any ideas on good plywood welcome.
Finally, of course, drivers. I have not chosen yet, but I want a fairly smooth response, so the V18-1000 I was thinking of is out because of the pronounced peak around 125Hz and drop below it. Any suggestions for around 1kW ?