Subs with room correction DSP?

The SVS is looking good. 
Yes there is an app to control it, but it's still just guesswork without a program to measure the frequency response of the room. 

Thanks for the responses so far. 
In the past I've had earlier model REL Subs and it was constant running back & forth between the sub and the listening seat. Adjust, listen, adjust, listen over and over. 
A remote would be a big help of course. 
In any case, was it JL that you plugged a mic into and ran some test tones, or am I thinking of another brand? 

I don't have a laptop, do any of these room measurement programs run on an iPad?

I think I'm going to go with SVS. 
Has anyone used the SoundPath Wireless Audio Adapter? Does it work well?

Has anyone used the SVS SoundPath Wireless adapter with the SVS Subs?

mijostyn
Thanks for the advice but 2 things: 
1: My speakers claimed frequency response is 25Hz-30kHz but I see a drop off in the bass around 35Hz so the subs are just filling in the very bottom.  
2: I use an integrated amp, so I'm not able to use this pre-amp you are recommending. 
That being said, I don't see the need to roll the main speakers off if they aren't struggling to provide most of the bass. 
If I had some small monitors, then yes, I would agree that rolling off the main speakers would be a good idea.