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RE: K15 midbass pair up and running

Zobsky and I continue the occasional Karlson experiment...

Pulled my Sigma18 from 1955 K15 w 12inch hole in baffle.
Please don't ask how I got the 18 to fit a 12 inch hole.
It was conjested and lost its kick, compred to earlier
DeltaPro 12. Don't know if the Sigma too big for the K15,
or just the 12 hole was choking the bigger driver to death.
Did get some phase plug effect from the undersized hole I
think. Upper mids were decent for 18.

And we installed Zob's 12 inch PYM per your suggestion to
do some measurements. But not using all the bolts, so its
sometimes a rattle... Doing OK against BillFitz 10, but
the BFM horn loads lower than K15 in a corner.

Plans are to open the baffle to properly fit the Sigma.
If that don't get the missing "hit" back, then new boxen
with taller coupler, probably not much wider than K15...

Zob wants to build a Smith horn.

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