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
I don't disagree Inna, but in my personal spaces, 1 was so good I reached a point where I couldn't shell out the cash for the second. :)

Your own mileage and money may vary, and nothing prevents you from buying 1 now, and 1 later.

Best,

Erik
Erik, right. Just because something is better doesn't mean that something else cannot be good, it can.
Thank you all for your comments and insights. I do have wall treatment and bass traps in the front wall corners. I have large framed maps on the walls and tried to reduce the effects of the glass. You all have put forth a lot of info, much of which I'll have to digest. Simply, I was thinking two to provide a balanced stereo sound across the freqs. I don't do thumping overbass and didn't want to find my space overloaded by using two. In the end perhaps the conservative approach would be to start off with one and see how it sounds.
Italian,

A single well integrated sub is invisible and works very well with stereo.
You cant tell where it is, at all. Just plan your EQ solution, or get a sub with very flexible eq bulit in.

IN fact, I'll say, you can't hear the difference of most good subs, but you sure can tell the difference of their auto-EQ. :)

A poorly integrated sub stands out like a sore thumb. :)

Best,

Erik
i run two sunfire hrs  ,and gik treatment they have takin awhile to dial in properly.I would have jl fathoms is i had the scratch.(pricey)