New T-TQWT for Christmas

[FreakyShotGlass]

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.

 

[bjorno]

AndesLB1560_T-TQWT

..Decided I need a sub for music..Any comments on the design are greatly appreciated.

Hi, A sub for music..Here are my suggestions compared to your:

b🙂

 

[rhapsodee]

Outstanding work as always bjorno!!

 

[FreakyShotGlass]

Awesome designs bjorno, so you think a 30Hz shoulder is better for music than 20Hz? Also what is the SPL response combined window telling me?

 

[FreakyShotGlass]

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.

 

[bjorno]

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

 

[FreakyShotGlass]

Here is the HR input for the plans posted above. The width of the enclosure is 400mm.

 

[bjorno]

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 🙂