Dual subs and room size


Hi. I've been considering dual subs with speaker input to pair with my Martin Logan 35xt's and not sure what I should be considering in relation to room size. My room is 17' X 10' with the equip along the long wall. I've been looking at SVS sb1000s and HSU vtf 1/3. The SVS are 12" sealed vs 10" ported hybrid for the HSU. It was suggested that I go with no more than 10".  They will support 100% music. The speakers are pretty much an 9' equidistant triangle set up and would be looking to set the subs on the outer side of the standmounts. Any thoughts or advice would be greatly appreciated. Thanks, Dave

italian
Subs are good for a small room as you can adjust the bass. I had 2 12" JLs in a 12x17' room and it was great. I have the same system in a 25'x26' room now and it totally sucks. 
Smaller room, more physical impact, taking less SPL to pressurize room and feel sound waves. RE mule kick test. 

Two subs. More physical and audible impact potentially better imaging, easier to achieve a flatter response, fewer dead areas, larger mule

Treatments- always a good idea, should be part of a serious listeners arsenal. 

Levels of happiness will always vary. I went through ported SVS' and HSU' I could not settle on either. Two sealed subwoofers with EQ can be bass rewarding. Two push pull subs in sealed cabinets with EQ can be all out bass heaven.   
    
I call your youtube clip and present one of several online docs that goes in depth what I was trying to point out clumsily.

http://ethanwiner.com/basstrap_myths.htm

Best,

Erik
I should also add, I wouldn't be such a proponent if I didn't have personal, practical experience with everything I have mentioned. Doing it right is pretty damn awesome, but spend your money however you want to. :)

Best,

Erik
This subject keeps returning. I think, most agree that two subs are always better. Two good subs.