My new subwoofer

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This is the driver.
It has not very long stroke, but this still moves pretty much air🙂

X-max linear +/- 10,5 mm
Weight 36 kg
 

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Some images from the construction of the sub
 

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This is very impressive. I really like the internal shape of the "boxes".

Where in this beautiful country are you located? Do you accept visitors? 🙂

I feel like I'm crawling in the mud with my beyma 12br70 t-tqwt's compared to you. How did you plan your corner traps?

Thanks for the nice feedback
I come from Langesund, also called sunshine coast. Here are the doors always open for visitors

Area marked with yellow is completely filled with glava. The bottom (concrete) and all walls in the sub is covered with 50mm rockwool
 

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My philosophy is lot of membrane areas and low stroke. It produces little distortion.
I think it is important with low group delay.
The room is also very important, and it is important to work for short reverberation in the lowest bass
 

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Same here mate. My next design will definitely lead down to the 10 Hz region within a +/- 3dB division.

Have measured 10Hz-11Hz-12Hz-13Hz-14Hz-15Hz-16Hz-17hz-18Hz-19Hz-20hz-22hz-25Hz-30Hz-35Hz-40hz with the same volume.
Can probably say that this goes totally in the basement😀
Level within +/- 2 dB
 

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Slightly off topic, but I hope it goes well

I have very good control of the first reflections in the room, maybe a little too good for someone opinion. I do not care, I like it that way
 

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