Very inspiring and most impressive work here.
I am a newbie about to pull the trigger on this project but still tying up some loose ends in my head as I formulate my plan.
Regarding the materials:
- Now that you are using the 5/4 Medex, do you notice any kind of sonic improvement or degradation over the glued 2 x 3/4 MDF sheets approach in your non modular design?
- Anyone have arguments for or against using Richlite for the baffle or even the whole H Frame? Price might be a negative for the whole H Frame, but would it improve sound as a baffle?
- Finally I am a 3 sub per cabinet kind of guy on a 2 sub per cabinet budget. Would it make sense to build a cabinet for 3 subs with the intent to add the third sub later, or would this just be adding an extra unused chamber to resonate until it is properly fitted with the 3rd sub?
With our kits (both modular and non-modular) we use a 1" bafle, it's actually a bit over kill but it does eliminate the issue of the screws poking through the rear roundover. ( I like to use the radius on the backside even with subs)
There is such little baffle in each "chamber" that a different material is unlikely to change the sonics... resonense here is not an issue.
Our non-modualr kits use 1.5" MDF not a pair of laminated .75" sheets. I did build a couple pairs early on using the laminated sheets.... pretty hard to say if there is any difference.
I have not noticed any difference in sound between the 1.5" MDF and the 1.25" Medex... but the 1.25" Medex is denser, resists moisture better, and seems to be more durable ( less likely to ding a corner etc). We recently sent Danny some prototypes of a different cabinet, I think he was surprised at the difference between the two matials.
If you built the subs in a modular fashion, you cold build them as duals then add a 3rd section when the time came. If you definitly plan to migrate to triples at some point, be sure you order the SW12-16FR's, the 8 ohm versions will not work for triples.
I also recommend you use the no-rez in your subs... when you are going with a set of subs at this level, just do them right ... right from the beginning.