Do I need a sub?

I really kicked around the idea of a swarm set up for subwoofers.
Spent lots of time researching and reading about what it would take to do it, what parts I would need, what approach etc etc...

I decided to just go ahead and add two purportedly nice sounding subs to what I have now.

The subs I bought are HSU ULS-15mk2`s. I have the tracking numbers sitting here.
I like Rythmik and used one with some MMG`s (my daughter now has it)
but the price to performance ratio just didn`t work for me.

Anyway..I`ll have 4 subwoofers in all. A Revel Ultima15, the two 15" HSU`s and to tuck away somewhere as needed 10" 350 watt sub.
All sealed.
Should be interesting in my 3840 cu ft room

Found a great price, so I bought 4 of them.
one for my cousin.

 
 If I hook up via speaker wire, doesn’t this push the low freq from the main towers to the sub?
or still full range for towers?

If you don’t use a high pass filter the towers are going to run full range. If you want to add a high pass filter you can add this! I used it when I had a sub with no  high pass filter with great results!
http://www.hsuresearch.com/products/high-pass-filter.html

Just checked the website, the speaker terminal hookup “is” a high pass filter.

 Monoblocks to speaker terminals on back of sub,......then speaker terminals to tower speakers.  This is how I will hook up.

 Only problem is the long speaker cable runs, 

thanks for all your help.