Here is the sim with dual drivers - the box should be 0.53x or 15 in tall and 5 in wide. Efficiency is up as expected and bass extension is better now with bigger cabinet.
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Freddi,
What are you referring to about Bose 901 fudging the response? You mean manufacturer's was way off what you measured?
OK, I'm in. Just put a check for $500 in the Christmas card your'e sending and I'll be eternally grateful. 
For the fun of it and to answer your comments - here are some tracks/vids to show there really is a lot on the bottom of the Karlsonator 0.53X and the dual Vifas.
The application reports overtones at a certain point, but the sound is real and continuous all the way down.
K 0.53X Sweep - 100-20 Hz
SnFlr Sweep 100 - 20 hZ
You might need some good earphones to hear the last part of this one, Very surprising!!!. K-053s on floor, 5 feet apart and 4 feet from the mike.
SPOTS at 10 Hz
For the fun of it and to answer your comments - here are some tracks/vids to show there really is a lot on the bottom of the Karlsonator 0.53X and the dual Vifas.
The application reports overtones at a certain point, but the sound is real and continuous all the way down.
K 0.53X Sweep - 100-20 Hz
SnFlr Sweep 100 - 20 hZ
You might need some good earphones to hear the last part of this one, Very surprising!!!. K-053s on floor, 5 feet apart and 4 feet from the mike.
SPOTS at 10 Hz
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Thanks for the sound clips Bob!
I am grabbing my 10 Hz to 17 KHz dual armature IEM's (114 dB/mW sensitivity) to see if I can hear what you are talking about.
Ok, very cool - I definitely hear 30 Hz but 20 Hz sounds like, well nothing - not surprising. How loud is the 30 hz? Although audible, the distortion is probably huge.
I think a lot of it has to do with having your very amp driving it - many amps cannot handle low frequencies like this. What kind of power are you giving them?
What are you recording the sound with?
I am grabbing my 10 Hz to 17 KHz dual armature IEM's (114 dB/mW sensitivity) to see if I can hear what you are talking about.
Ok, very cool - I definitely hear 30 Hz but 20 Hz sounds like, well nothing - not surprising. How loud is the 30 hz? Although audible, the distortion is probably huge.
I think a lot of it has to do with having your very amp driving it - many amps cannot handle low frequencies like this. What kind of power are you giving them?
What are you recording the sound with?
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X, What uncompressed audio files can you play? PC Flac or Apple m4a. I'm using a Lexicon Omega with my phones.
You got it right, There is little or no body to the 20 and 30 samples. I just wanted to show the cone activity at the bottom freqs. 25 drivers would probably have some heft.
I have a night off (from the wife and kid
Mr.X, how would the CHR fare in a .4K? Can't scale it down anymore because of driver size. Maybe narrower?
I will run a sim when I get to my computer. You want 1 driver per box right?
I have iTunes to play m4a and Audacity can play all the other formats. I also have Sony Acid Pro if I really need to do something special. I will have to check out lexicon pro. I just started to use flac the other day and it works real nice. My digital recorder can also record native 96khz 24bit wav files.
