Thank you for your reply
(I have gone back to uni (5 years in )so I am trying to save money rather than buy a PSA sub. I think I could build 2 for the price of one there, even tho the 30f se on special).
Background - I want to build 2x 2x15inch opposed, sealed subs for my home theater (lounge room really).
I think these will be easiest over ported, especially as I don't have all (any) the specs I want. A sonotube one will fit nicely in the corner and a square one will fit in between my couches. Thats about the only spaces I have to fit these things.
Drivers seem to be really expensive here in Australia but I found some on clearance at deephz audio which seem a steal. They are ex PSA drivers as used in the XS30 so they should be decent drivers. The downside is that there are no specs available for them. I have contacted Peter at deephz and he does not have the details and Tom at PSA wont give them to me. He says as they have never been sold separately he does not want to give out internal figures. That sucks but I can understand the position.
So all I have to go on is the dimensions of the PSA subs which had these drivers in, the XS30 and the XS15. The XS15 outside dimensions calculate to 4.33 cubic feet ^3 and the XS30 outside dimensions calculate to 5.625 cubic feet ^3. Power rating of the bash amps for the XS30 and the XS15 are 500w and 750watt respectively. Although there are ICE amps available for upgrades. I saw a pic of the XS30 with a sub out and it seems like a 25MM case heavily filled with sound deadening material. Even the new s3000i has the same size enclosure (better drivers) but a larger amp than the XS30 I am planning on sorta copying. I know I have to take wall thickness into account.
So I want a cylinder formatube or whatever 450mmx~1m for a volume of 5.61 cubic feet^3
I was planning a box a bit bigger for 600x600x600 (8 cubic feet) but I could make that a bit thinner if needed to match. I was thinking a little bigger might be OK here. But Ive no way to sim it or tune it ahead of time. Planning on using Inuke 6000DSP amp.
Anyway I need a ton of advice, but I was starting with a small question at first haha.