New T-TQWT for Christmas

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Decided I need a sub for music that will fill the gap from 20-80Hz created by using full range drivers in single driver enclosures. Here's what I have come up with, hopefully to be completed before Christmas or at least for the new year. This sub will always be in a corner so decided to model in 0.5 Pi, but the response is still just as flat in 2 Pi just with less extension and obviously much less efficiency.

Any comments on the design are greatly appreciated.
 

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After tweaking the original abit and then changing the values to suit the plan I came up with in sketchup I got a response that was a bit smoother. I tried to plan your designs bjorno but fitting the driver in seemed to be a bit of a challenge, I guess thats the joy of working with 15's.
 

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After tweaking the original abit and then changing the values to suit the plan I came up with in sketchup I got a response that was a bit smoother. I tried to plan your designs bjorno but fitting the driver in seemed to be a bit of a challenge, I guess thats the joy of working with 15's.

Hi,
The FR looks better and the gldy looks good too;To be sure if your design is good, please post the HR input screen and yes 30 Hz IMO is low enough for most music (hint: look at f-10dB for typical in room experienced BW).

See my simple picture suggestion on how to fold a T-TQWT for easy driver maintenance and for easy accessing (tweaking) the stuffings:

b
 

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Looks over-all good

Hi,

Forgot yesterday to post this picture belonging to 'LB1560_Home_xmax=11mm-test2', see the first picture.

Picture#2 is your final design, picture#3= Home TH suggestion and picture#4, #3 and #4 for closer IR examination using HOLMImpulse program.

b :)
 

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