Optimal volumes and drivers for Klams?

[freddi]

I've mainly mucked with regular Karlson aspect coupler and built one sealed test klam with 18"

with lower Qts 18", 3-4 foot vented Karlson seemed about enough for rear chamber and about half that for front chamber.

for non-coaxial, K15 liked Altec 421-8 and 421-LF tone-wise.

Magnetar built a vented klam ("Rosie") whose height was right to stack an open baffle mid/HF unit - IIRC this came in around 200. The rear chamber was tuned to 40Hz but not sure of optimal rear chamber volume - maybe 4-4.5 cubic feet before loading the 15" (?) Also not sure what he did with front chamber in black version #2 (if that was the 2nd version)

slot gap on my sealed 18" klam affected its harmonic structure but did not show much on RTA

what did other coupler builders find out/do to make pretty good playing stuff?

this thing is a "klam" - (from John Karlson's Asymmetric Projector's supposed clam-shape dispersion pattern)


JOhn Sero built a copy of one of Mike's klams - I don't know what one vent was for - here's Sero's page - watch out for music loading :^)

http://www3.sympatico.ca/jsero/


this vented 18K is a regular konfigured karlson-type and seems well behaved with good output without much cone excursion. 1/16" p-p is pretty loud