I've only had ported enclosures up until now, so it's time for a venture into sealed subwoofers. I have a total of four TC-12 OEM drivers that I will likely be using for this project. My initial thoughts are using the drivers in two enclosures, so 2 drivers per enclosure. For the design I'm between an opposed driver setup and a setup similar to the JL Gotham. I would like to keep the theme between these subwoofers and my mains to be the same, so in that regard, something like the Gotham will work better. The mains are going to be towers with curved sides similar to the
center channel I built.
For size I've been thinking 4.5 cu ft fully stuffed. I have limited experience with stuffing and enclosures. WinISD says that with full stuffing 2.25 cu ft per driver gives a Q of .577 which is what I'm shooting for. I am also considering using something like the Marchand Bassis EQ.
At this point I'm looking for thoughts on this. Like I said I don't have much experience with sealed subwoofers. The emphasis will be on getting good response down to 20 Hz, hence the idea of using an EQ. I think that with 4 drivers there should be a fair bit of opportunity to use EQ and still maintain a good max output.