So It`s Ok To Mix and Match Ported and Sealed Subwoofers ??

Tim..that looks like a good plan to me !
Thanks Again   
Steve

Excellent, from what I've read, the HSU ULS-15 mk2 are a very good choice.

They are very good. :) Monsters in fact.

Hello Steve,

     Okay, good.  You should be aware that I went from 2 subs to 4 subs in my system search for high quality bass.  I've never tried 3 subs but one of the most prolific acoustic researchers and advocates of the 4-sub DBA concept, Dr. Earl Geddes, has stated that 3-sub DBAs can be as effective as 4-sub DBAs if the 3 subs are properly positioned and configured, with configured meaning the volume, crossover frequency and phase controls are optimally set.
     I have no reason to doubt that 3 subs can work well but I can't help thinking that optimum positioning of each sub is likely more important when 3 subs are used than when 4 subs are used.  I have complete confidence in the crawl method of sequentially positioning each sub in a room, since I've used it effectively in my room with 2 and 4 subs, but wanted to make sure you're aware of exactly how to do this.
     I'm also thinking that you have the option of creating a custom 4-sub DBA system, by including your smaller 10" self-amplified sub as the 4th sub, if you'd like.  In other words, your room is large enough that I'm fairly certain that 3 large subs will provide high quality bass throughout your entire room, if precisely positioned and configured, but I'm very close to certain that 3 large subs and a 4th smaller sub will do so.
     I still  think a good plan is to setup a 3-sub DBA system, closely evaluate the results for a few weeks and progress to setting up a 4-sub DBA system only if you're not completely satisfied with the 3-sub DBA system results.


Later,
Tim

Erik...I`m looking forward to them !

Tim...I`ve done the crawl method a few times over the years.
Sub placed at the listening spot then the crawl .
I mark the different spots that have strong bass with tape on the floor.

Then I would go back and pick which spot has the best tone.
I plan on doing that with each sub...including the 10" :)

FedEx initially said the subs would be here Weds, just got a txt earlier saying 1 of the 2 will be here tomorrow Tues.
Seems the subs went their separate ways at the Louisiana facility so 1 went out from there later than the other.
Oh well....should be interesting and fun even with just the one ! 

Hello Steve,

     I consider fun and enjoyment the only results that matter in this crazy hobby.

Enjoy,
Tim