In my family/theatre room - I've got room for two subs if I can keep them around 4 cubic feet each. I'm trying to determine what the best design/driver is, given that constraint. I understand I'm going about this backwards from what is optimal - buying a driver and then planning an enclosure around it - so please bear with me. I might be able to shuffle some things and get enough room to fit two MartyCubes with SI 18's, but that's a big IF. So for the purposes of this discussion, I'm assuming the following constraints:
1) My available space is 24x21x21.
2) I have an Inuke3000DSP
I'm relatively new at modeling in WinISD, so fingers crossed. Throw in ported designs, and things get pretty wild pretty quick. So I'm going to show all my work just in case I messed something up. I looked at three scenarios.
1) Green: Sealed SI 18 in 4 cuft. Wired for 2 ohms, 1040 watts input.
2) Blue: Ported Dayton HO 15 3.75 cuft tuned to 23. (This is Chaluga's mini-cube concept, only I made the slot port 2" high based on some commentary I saw from Bill F.) 4 ohms, 680 watts input based on the inukes 4 ohm RMS.
3) Pink: Ported SI 15 in the same box. Wired for 2 ohms, 1040 watts input.
When I look at my SPL charts, I say I want to go with the SI 15 ported first. Then the sealed 18"SI. I'm not seeing the benefit of going with the Dayton HO 15. I just don't have enough confidence in my modeling to say if this is a correct conclusion or not. Especially since I've seen comments from posters more knowledgeable than I that indicate the SI 15 doesn't do well in small boxes. So I'll take any and all comments on where I screwed up, where I'm crazy, etc...