18cm in exponential pipe

[jzagaja]

Here is driver:
W.18.200.8.FGX

below is proposed enclosure shape.

Manufacturer advice 18L/40Hz.

Could you advice with quarter wave pipe?

 

[GM]

You're going to have to be more specific as to the size/shape of the driver pod plus if sealed as indicated, then can't use a 40 Hz flare frequency since it will be quite long compared to 40 Hz TQWT tuning.

 

[jzagaja]

Woofer size is 18cm. Define n*Sd needed. We can add second tunel like B&W Emphasis. Cabinet can be ported TL.

 

[GM]

OK, pretty busy with 'life' ATM, but will try some offset driver ones. In the meantime, you could reshape the 'bell' of this HR end loaded, vented TQWT sim to ~round at the mouth per your sketch if it meets your needs.

 

[jzagaja]

Thank you GM. Some stuffing should help with 400Hz harmonics? I'm going to 3D print this cabinet.

 

[GM]

You're welcome!

Yes, as well has the 'bump' at tuning. Since you're ready to do something, give me a few days to fine tune it a bit and do an offset driver version that will reduce the amount of stuffing required.

 

[jzagaja]

I'm building for my father and like idea of B&W Emphasis but with waveguide. For this project I use smooth driver DFM-2535R00-08 and ATH waveguide.

 

[GM]

I forgot to ask at what height centerline you want the woofer.

 

[jzagaja]

Approx 100cm.

 

[GM]

 

[jzagaja]

Can be double fold.

 

[GM]

Almost missed this!