An ML-TL is defined by the cross-section, the length, driver offset, restricted terminus details (placement & size), and the driver offset.
Cross-section is critical.
Chamfer, roundovers help with both edge diffraction and the nature of thebaffle step diffraction. A Pensil built into a circular cyclinder would be good (hard to mount driver). Trapezoid is a crude representaion odf a teardrop and has a very low diffraction signature.
The terminus in the Pensil is the cabinet material depth (18-20mm) and at the very end of the pipe.
dave
Is it the total square centimeters of the cross section the main consideration or is the shape of the cross section as important?
Because by laws of math, I believe I have the same total square centimeters of cross section. I have the same enclosure height and volume therefore the same cross section. I've just masssaged the shape of it a bit.
I was inspired by nandappe to make his twtd13.5t for maops. Going to give to a family member as a gift. Fun build and of course many things I could have done better. I'd suggest not mitreing the joints. So hard to get right.
