I'm of course pickled tink that you haven't stopped tweaking the Pro 30 and very much look forward to further elaborations and descriptions (eg: what is "Acousti", and why does it have 3 layers, and what's its claim to fame?), but migawd, we have
got to get you a camera with decent macro capability and maybe a tripod. Toot sweet.
->My feelings exactly. I find when I rub the two sticks together the image capturing box doesn't charge up as fast anymore and the sputtering sulphur on the wooden flash rod has burned all my white shirts.
Good idea there's my present to myself soon.
Funny are those vents surrounding the badge lip on the PRO30? They're tiny almost microscopic.
Acousti is this stuff.
http://www.acoustiproducts.us/en/acoustipack-extra-s.asp
graphs etc here :
http://www.acoustiproducts.us/en/technical-information.asp bottom talks about the decoupling
good heft to it.
You were also wondering how I'd approach an open design SFI a bit ago. I now have what could be described as a semi-open pair.
I removed everything in these and while I was in there for another tweak I figured hey why not see how they sound with an open back, it's just a simple press fit to the ears.
Needless to say I gutted these taking out the neoprene disc backing that was there to close them off, and applied Acousti foam (yeah I know
but it's here staring at me , calling me ) to the inner wall sides and in the exact pattern as the vents in the back there. So that's the size of the venting.
<- Not my picture just too lazy to look further. Same pair.
So not entirely open but enough to make them semi. All ranges of bass are fuller and the thing sounds a little more airy and spacious. I really need to put epoxy on these screws. Only thing I can think of trying to fine tune would be some of that pulled cotton.