Hi I'll try be brief yet descriptive. I got 4 black widows 1505KA8DT [350w] in twin reflex cabs that I wonder if I could get better out of them with something other than the stock peavey cabs.
With my initial reading of posts the tiny Xmax (1mm) & high Fs(50.8Hz) tells me they''re not subs but they could be bass/ kick bass. [not fancying the idea of putting them in midtops just yet as it would unbalance the whole rig]
I read a post from Cubo15 [to another user] that for these, for kick bass a complicated horn [his words] would be the way to go.
I've been looking over the plans and I still can't figure what would be suitable to even bother modelling in hornresp, any suggestions please,
Current set up; single superscoop, these 4 black widows, 4 *15 inch 300w fane classics, 4* 10 inch 150w classics and fane tweeters, plus 2 * wharfdale lx15b 700w so although I'm short of sub, but I've got lots of bass reflex that I have to make sense of.
Music... erm hard dance.
I hardly ever make passing comments If I can't remember them they usually contain clues to my train of thought.
I also think they're great as part of a 2 or 3 way full range cabinet as everything about them seems optimized for that use. Newer drivers often have Xmax calculated by adding 1/4 of the gap depth, these drivers might use the older calculation that doesn't, so the usable excursion could be higher then published. If you can tell more about your current use, like the reflex cabinet internal volume, tuning plus the power and processing they get, it's possible to deduce if there's more possibilities for them and what those might be. Still, in pretty much any case that would be a front loaded horn rather then a HOG.
As is, for a twin 15" cab the internal volume works out around 313 litres, tuned to 40Hz.
As for power I've a few amps so anything from 1-1.3Kw [just under watts pgm]. [can depend on what amps I have to hand and what amps are loaned out]
Processing, [again depends on what other bass speakers I have available] A couple of amps have HP40Hz-LP150Hz crossovers in them, peavey recommends a LP @200Hz, and I also recently got a dbx driverRack PA [which are laughed at in pro audio circles but it's better than nothing] So I'm still experimenting with what's best. If I have my 18"superscoop I've tried using the peaveys as kick, 80Hz to 140Hz, if the scoop is on loan I use them 40-150Hz
But like I said I have a few bass reflex cabs that I need to make sense of [and want to change] and am willing to take guidance and experiment with.
The design you posted is indeed suited for drivers with a short Xmax. It doesn't go particularly low (50-ish Hz) and personally I would not use them as kick but rather as a bass cabinet. I would call it a long throw design (if there's such a thing).
If you currently use them in a 300 liter reflex cabinet tuned at 40 Hz and you're able to give them 1 kW per pair Xmax must be a lot higher then advertised. In that case you could use them in Cubo Kick.