2 subs in a small room?


I recently added a REL T/5i sub to my system and have been very happy with the results.  Integration was a breeze and I am now more engaged in my music than ever.  So of course being a typical audiophile, I got to thinking if 1 sub sounds this good will 2 sound even better?  The challenge is my room.  Its very small at 9' w x 10' l x 9' h.  The back wall is about 3' high, above which it opens up to the rest of my house.  I have bass traps in this room.  Right now, using just 1 sub, my freq response from 20-1000hz is +- 2db with a -4db dip at 200hz and a +4db hump at 40hz.  Not perfect but my system still sounds amazing.

I know the general consensus is a second sub will sound better but I am concerned with the size of my room.  Will adding a second sub in such a small space over power it or will it actually help to smooth out nodes?


128x128tboooe
martykl, I do have an SPL meter but I have been thinking about using room correction with something like DIRAC.  At the very minimum I am going to get a USB mic and measure properly measure my room using Room EQ Wizard.

jafant, I appreciate the compliment.  Long Duc Dong is my personal hero.
" These days, I use Audyssey. It’s certainly not an audiophile approved method, "

Which audiophile approval board is that again?

They may be too busy listening to fuse directions.  :^)

FWIW I approve any practical solution that works. Doesn’t matter what others think as long as it works for you. 
Tbooe 

If my understanding of Dirac is correct, it should be a breeze to integrate a pair of subs.  If you're not using it yet, you may find that your existing, single sub set-up sounds much improved.
I have a 13.5 X 13.5' listening room and decided to bring up my JL  Audio e110 sub from the basement HT system to hear what it sounded like. It helped greatly, so I bought a second sub and have no regrets. I do have DIY bass traps in all 4 corners now and the crossovers on the subs turned down, just filling in the bottom octave. The biggest impact in my system so far.
lancelock, may i ask where you placed the second sub relative to the first?  I understand the second one should not be placed in the same mirrored location.