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Is that $1500 for a pair of speakers (wood, horns, drivers, misc) or per speaker? Either way, that is a good budget. Since you also know how to...
I think you should take a step back and look at this as trying to solve a specific problem. It seems your requirements are recording studio...
Re: 2x: TD15M, SEOS15, DE250, ultra-sturdy ply rosewood veneered cabinets Bill, I sent you a message but haven't heard back.
That is pretty much it, but that is likely not enough. Geddes uses 30ppi reticulated foam which is generally used for aquarium filtration.
Re: 2x: TD15M, SEOS15, DE250, ultra-sturdy ply rosewood veneered cabinets Bill, do you have rough dimensions? Also, about how heavy are they?
Your model looks like mine. It is interesting that the model is that far off the measured. I wonder if some amount of "averaging" is occurring...
Yep a sideways SEOS-12. Taller than wide. A small coax would also work. A 3-way coax will be more expensive (and IMO slightly lower performance...
Bill- I love the work and the spreadsheet is awesome. I'm curious if you considered doing a 2-way with something like a 4550 and 4-6 NS6's...
DS- Have you considered a SEOS-12 placed vertically over a 6-8" woofer? I'd cross around 1500hz. You will be restricted to a 50deg horizontal...
Do you have a specific model number or link?
Build a box for the Deltalite II 2515 and SEOS-12 and take some measurements. I'm always game for working up a crossover for someone to try.
Do you have more specific examples? Can you confirm that it is open cell reticulated foam? I'd like to see some measurements and listening...