If you had the guts for M-19's

[westend9]

If the design has been posted on-line and for personal use, then it's available to everybody and since I'm a big fan of MLTLs, a large one of at least Vb = Vas/1.44 and preferably Vb = Vas, Fb = Fs at least 30" wide to allow for plenty of tuning flexibility works for me. Of course if there's not enough room gain, then power handling will suffer in the octave above Fb.

GM

Hmm, don't recall if his was ever published, so if not, then it's up to Westend.

Yeah, and I'm still enjoying the speakers! Thanks again, GM! Here's the build thread:GM's MLTL for Model 19 drivers