Now we are heading DOWN into the rabbit hole! What fun
Acoustical engineering is outside of my realm of training, clearly different from good old fluid mechanics and such. Resonance distortion, different paths, pressure gradients ... it does make sense that there can be some interesting things going on in this cabinet.
Anyway, I get to sit back like the guys in the research foundations that provide funding and let other guys do the heavy intellectual lifting. Hopefully SD weather will cooperate with measurements this coming weekend.
Somewhat related: I picked up my 5 kg of washers from Grainger, PLENTY of added mass for the SLAPS I bought. The difference between models and reality was well nicely demonstrated last year in the sub build I first found over on data-bass but is also over here: http://data-bass.ipbhost.com/topic/7...in-a-tiny-box/
The finding that 'small' parameters are not necessarily valid at modeling high power operation was fascinating to me, especially that the PRs perform BETTER than predicted at high excursions. Anyway, I have (at the moment) 10 JBLs and two leftover (and OLD!) HE-15 Stryke drivers. I was thinking I would build PR
subs with the HE-15s and do nearfield with sealed JBLs. Then a couple of weeks ago RedFive started posting some crazy modeling of multiple driver subs, first the 9 ported JBL design, and now this Devastator.
Insanity is an interesting thing. I find myself as a silent observer and then end up kicking in $ to get this current project built. The worst of it is that our intrepid builder is obviously FAR off the deep-end as noted by his OTHER projects
Chris, you had best make sure that your homeowners insurance isn't going to require an additional rider for sonic damage!
RedFive, thanks for the design work ... and congratulations for the MOST IMPORTANT project you have underway: your wife & tiny-but-growing child