Let’s answer this question first: will it treat it as one sub? Yes. When done right, you will hear the array as a single source. @erik_squires is correct that you would be better off using powered subs. DBA has been studied by some credible people in the industry, including Dr. Floyd Toole, Dr. Earl Geddes and Dr. Sean Olive. @helmholtzsoul is also correct when he said the software is as good as the programmer. This is true of all software, right? The reason some software misses the mark is because when dealing with frequencies between 20HZ and 300HZ you have to address not only frequency domain issues but also time domain and phase domain issues. It gets complicated fast. And that’s why a computer will do a better job than us. DSPEAKER has some very easy to use gears that can do a great job. All that will be left to do is add some acoustic help (corner traps etc..) and do a final touch up by ears to set it to your liking. According to Toole, when you get the bass right, you already get 30% of your system right. DBA is the easiest and cheapest way to achieve it. Good luck.
How does room correction treat multiple passive subwoofers?
Say you were running 4 passive subs connected to a single amplifier. The amp connected to the preouts of a preamp/ integrated amp that has room correction. How would the software calibrate the subs being they are placed around the room in different locations? Would it treat it as one sub? Would it even work for properly calibrating? Does different correction software from different manufacturers handle this duty differently?
Thanks!