Double Bass Array

[bubbleboy76]

I have recently been intrigued by the concept "double bass array" a.k.a "CABS":
http://vbn.aau.dk/files/12831869/AC-phd.pdf

Pretty cool idea!

Anyone ever heard this concept implemented?

BTW, the author of the thesis, Adrian Celestinos, is working for Samsung in the lab in LA.

The quick-and-dirty summary of the concept (very very very summarized):
4 subwoofers are placed 1/4 from every boundary on the front wall. Thus, only the roomresonance of the lenght of the room remains. Then the same setup is placed on the back-wall, playing out of phase, delayed with the time of flight for the lenght of the room, so the sound from the front array is cancelled exactly when it hits the back wall. It is like the room has no back wall!

[baldrick]

IT dosent have to be 4 woofers... A friend have DBA consisting of 16xAE18s

[bubbleboy76]

IT dosent have to be 4 woofers... A friend have DBA consisting of 16xAE18s

Yes I know, it is dependant on room and woofer size, how many is needed to form a plane wave. Very well described in the linked phd thesis.

So, how does your friends system sound and measure?

Pics?

[baldrick]

The room/system is being redesigned now but an old picture of front subs:

[bubbleboy76]

Nice.