John,
Thank you for a great explanation (justification) for using more than one sub. The article is fairly short but illustrates that using up to 4 subs can minimize variation of FR from one location to the next within the seating area and helps to minimize the variation of overall FR within the seating area. By the way, the study is on only one low frequency audio channel sent to all the subs. They mention that there is "questionable" advantage to having stereo or more bass channels/subs. My processor does not create a stereo LFE output to two subs, but it has the capability to redirect bass from the left main and left rear channels into a left subwoofer and redirect bass from the right main and right rear channels into a right subwoofer while giving the same LFE signal to both. Since separate bass channels is of questionable benefit, good news is that I can use the same SMS-1 to run 2 EP-500s if needed.
