Does the compliance of the 756 allow for a sealed box? Or is it really only good in a vented?
I never saw any of the WE 700 series speakers or Altec descendants in a factory vented box from either WE or Altec, except for the 756B in the Melodist 700A.
Actually my 618 has a small hole that looks like a hand hold...not sure what they were doing with that. Looks small for a port, too big to call it a well-sealed cabinet...
WECo recommended sealed slant front enclosures, as pictured below for the 8", 10', and 12". Some of the WE "L" series PM theater systems of the late 40s used one or more 12" with short front horns, but they were still in sealed back cabs.
Qts is high enough to use in an open baffle, which probably came in handy for various ceiling/wall installs.
It is also best, I think, to use them in a sealed box because then you get a good LF boost due to boundary reinforcement. These are wall mount speakers after all. Right up against the wall, the LF fills in and some signal is reproduced well below rated response.
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