I completely agree that Duke Lejeune of Audio Kinesis is the most knowledgeable. best and most credible source on these forums about all things concerning 4-sub DBAs. He's always willing to assist and has probably forgotten more about proper 4-sub DBA systems and setup, as well as how bass sound waves behave in domestic sized rooms, than I've ever known. He often chimes in on threads like this but, unfortunately, not this time. I agree with clio09 that you should call or email Duke at Audio Kinesis for the best advice. Best wishes and enjoy, you're going to be amazed once your DBA is setup properly.
Here's a little history on my experiences with the DBA concept for those interested:
I actually first learned of this exceptionally good bass concept by chance. Over 10yrs ago, I was just looking for the best way to supplement the bass performance of my combo music and HT system that utilized Magnepans as mains. I had called Audio Kinesis about another matter, talked to Duke's associate, James Romeyn, and we got talking and emailing about my system goals. He suggested either of their two 4-sub DBA versions (the AK Swarm or Debra) as a very good bass solution for my Magnepans.
This was the first time I'd heard about the 4-sub DBA concept and it really piqued my interest. I dove into reading all I could find on-line about the subject, beginning with Earl Geddess's PHD Thesis on the concept, his subsequent White Papers on it, articles on multiple subs by Floyd Toole and Harman's Todd Welti as well as several others.
At the time, I was planning on buying a pair of high quality subs such as JL Audio, REL or Vandersteen for up to about $6K. But I decided to give the AK Debra a try instead since this whole scientifically tested and proven concept of the 4-sub DBA made so much logical sense to me, I was very interested and curious about its practical performance, I felt a bit adventurous and wanted to try something new, interesting and nonconventional.
Anyway, I was amazed, and still am a decade later, at how well this DBA concept performs in my 23'x16' room. It took half a day to properly set it up but I didn't care once I heard and felt the results. It performs way beyond my expectations on both music and HT and is definitely the single best upgrade I've ever made to my system during my 50+ yrs in this hobby. Hyperbole? Maybe, but this concept is outstanding and I know it will work equally well with any main speakers I care to utilize now or in the future.
Tim
Here's a little history on my experiences with the DBA concept for those interested:
I actually first learned of this exceptionally good bass concept by chance. Over 10yrs ago, I was just looking for the best way to supplement the bass performance of my combo music and HT system that utilized Magnepans as mains. I had called Audio Kinesis about another matter, talked to Duke's associate, James Romeyn, and we got talking and emailing about my system goals. He suggested either of their two 4-sub DBA versions (the AK Swarm or Debra) as a very good bass solution for my Magnepans.
This was the first time I'd heard about the 4-sub DBA concept and it really piqued my interest. I dove into reading all I could find on-line about the subject, beginning with Earl Geddess's PHD Thesis on the concept, his subsequent White Papers on it, articles on multiple subs by Floyd Toole and Harman's Todd Welti as well as several others.
At the time, I was planning on buying a pair of high quality subs such as JL Audio, REL or Vandersteen for up to about $6K. But I decided to give the AK Debra a try instead since this whole scientifically tested and proven concept of the 4-sub DBA made so much logical sense to me, I was very interested and curious about its practical performance, I felt a bit adventurous and wanted to try something new, interesting and nonconventional.
Anyway, I was amazed, and still am a decade later, at how well this DBA concept performs in my 23'x16' room. It took half a day to properly set it up but I didn't care once I heard and felt the results. It performs way beyond my expectations on both music and HT and is definitely the single best upgrade I've ever made to my system during my 50+ yrs in this hobby. Hyperbole? Maybe, but this concept is outstanding and I know it will work equally well with any main speakers I care to utilize now or in the future.
Tim