So, since I wanted to try TL’s for the first time I took a re-read of the Alpha TL by Rick Schulz and it just so happens that he recommends a Qts of .5 to 1.0 and the B200’s are .75 so......

Now I would like someone to double check my work. I used the published T/S specs from Visaton and its Qts .75 / FS 40Hz / Vas 102L (6224 cu in)

I decided on a F0 of Fs X 1.4

I will be using Poly as stuffing as that is easily available and easy to work with.

This is what I got.

F0=56

Length = 58 inches

Z= .273

Alpha= 1.693

Sx= 225

Stuffing 1.0Lb/ cu ft.

So, do those numbers look right?

So I am think about a box with internal dims 11.5” X 19.5” with the speaker mounted on the wide side.

Since the terminus is at the bottom, how high should it be off the ground? Is 2” sufficient?

Anything I”m missing?

I am really planning on using the B200’s on O.B’s but I need to try a TL.

I need another pair of speakers as much as I need a hole in my head but I suppose I do not suffer from this madness anymore than anyone else around here!

Thanks

Andrew