Distributed Bass Array configuration


Please, I don't want to debate the merits of the DBA nor of those who espouse it. I am considering adding two more subwoofers to a system that has two already. To those who use a DBA,I am interested in how you have configured them, specifically--
  1. Do you run in mono, or do you split the array to run in stereo?
  2. What is your approach to setting phase (delay) among speakers that may be facing different directions and are different distances from the listener?
Thanks!
mike_in_nc
Hello audioquest4life,

     Congrats and welcome to the DBA Swarm Club, be prepared to be amazed! 
     I wasn't even aware AK offered a larger Magnum version of their Swarm system.   
      James Romeyn, of Audio Kinesis, was also the person who convinced me to give their 4-sub Debra DBA system an audition in my room. He and Duke really know their stuff and are very helpful. 
     Congrats on your humongous and impressive Classic Audio T-5 Reference speakers, too!  I wouldn't think those huge things needed any bass help.  But that's the amazing thing about the whole 4-sub DBA concept, it'll integrate seamlessly with virtually any pair of main speakers and in any room, when positioned and configured properly. 
     My only advice is to configure the volume and low pass crossover frequency filter settings as low as possible with the bass still sounding very good to you ("very good" meaning powerful, detailed, dynamic and natural).  Oh, and don't forget to make sure your chinstrap is securely buckled.

Tim    
Hi Tim,

Thank you. Appreciate the good vibes and feedback. Yes, the Classic T-1.5s produce great bass as is, but having lived with augmented bass for so many years and my frequent excessive need for an over abundance of bass when rocking out, I felt that the 4 sub DBA concept is at least an almost perfect solution for my needs. At least worth experimenting with after speaking with James. Augmented reality is a good thing when done appropriately. I know a few on this forum and other forums who have Uber main speakers and still use augmented bass ala DBA. 
The new Magnum DBA Swarm is in initial production that will probably hit the streets around August, pending parts availability. It was designed by Duke for those folks who have larger rooms and thus a greater need for bass. 12” drivers all the way around. My room is nearly 19 feet wide x 33 feet deep x 8 feet high. It is the total cubic volume in feet that the DBA works it’s magic up to a certain total volume…the Magnum is for large or extra large rooms:j. The original concept behind DBA was to address bass issues in smaller rooms. The Magnum advances this concept further for larger rooms. 
Glad you are enjoying your system with the DBA. 
It’s only a problem if not properly implemented. So, Not me, I am not worried, at least for low level listening where bass smearing might be more noticeable if not properly implemented. At way louder and extreme listening levels…the way I listen, I have learned that when I play very loud I could care less about bass smearing, because I want to feel the kick drum.

For those low level wine sipping moments, yes, one should be very careful about messing with the frequency spectrum in order to enjoy in solitude the crispness of a cymbal. I think that if the DBA system is integrated properly it affords one the ability to integrate bass effortlessly, no matter the listening level, which is highly appealing to me.