Different drivers will require different amounts of air space / box size. Since you want sealed, I would just plug in the specs to an online speaker enclosure calculator to determine box size for a given driver. As a starting point, I would put in a System Q (Qtc) of .88 to find a minimum box size for good sound. You can go a little larger on box size if you find a flat-pack you like.
- I really like the completed dual box from DIY Sound group. Would two of these, one in front and one behind my main LP be a good option as opposed to 4 cabs?
- well, some recommend 3 or more subs throughout the room to deal with standing waves.
- I would try the sub you have near-field to see how it sounds. It's free to try!
- I initially was set on the UM 18-22 but then came across the HST-18 and UXL-18, both of which are substantially more in cost than the Dayton. As I said, I dont need crazy SPL, but also don't mind spending the money for the latter if they will make that much a bigger impact.
- well, I looked up the HST-18 and it has a lot of throw, more than the Ultimax. Headroom is good. However, some claim distortion can rise with throw (xmax). There are always compromises, no free lunch. Plus you said you don't need a lot of output? The Ultimax is a lot of sub for the money... it looks like they were trying to make a sound quality woofer with SPL also. Dual spiders (probably mirror image), and low inductance, fiber dust cap. I like it.
On that last note, since you are looking at quality sound and seem to have the budget for it, perhaps you should consider the Acoustic Elegance drivers. They are said to be world class.
- With respect to cabinets. Are their cabs specifically designed for each of the drivers I've listed?
- I don't know.....you would have to check it with a box program as I outlined above.
From my main LP, the left sub would be in a corner (1/2 wall is only 3 feet) while the right would be about 3 feet from its wall. The subs I will eventually build for near field will both be corner loaded and about 3-4 feet behind where I sit.
- I'm not sure that's nearfield? Usually, nearfield subs are only inches away from the seat.