I have already spent quite a bit of time at the tlinespeakers.org and quarter-wave.com and still do not understand how to fully calculate enclosure specs for a TL.

If anyone could help me get going in the right direction I would greatly appreciate it.

I need help understanding how to calculate line length and how do you measure the line length of the box? is it from the speaker opening all the way to the port end?

And after calculating the line length how do you determine the box height and line width.

Does tapering have a big advantage? Should the box end up having a specific volume in the end?

Sorry for so many questions i'm just really interested in this box design and would like to learn to build my first oen so i can experiment from there. Thanks for your time!

My driver specs are:

Model: 05C154

Nominal Impedance(Ohms): 4

SPL dB 1W/1M: 90.2

Displacement, cc: 3260

Displacement, cu.in.: 198.7

Hole cutout, in dia: 13 7/8

Mounting Depth, in.: 7 3/8

Revc: 3.32

VC Inductance, mH: 3.44

Sd, m3: 0.0856

BL: 15.32

Vas, Liters: 272.329

Vas, CuFt: 9.62

Moving Mass , oz.: 7.38

Fs:21.68

Qms: 11.2

Qes: 0.397

Qts: 0.383

Peak Power Handling, watts: 500

EXmax, mm: 11.53