Doing some more thinking… The Scanspeak aperiodic “variovoents” versus polyfill.
I’m familiar w/ using aperiodic membranes but the “enclosure” is kept as small as possible and the assembly is mounted in a configuration that would otherwise be an IB if not for the aperiodic membrane. I think this results in a .7 Qt.
The Scanspeak vents seem to just be an add on to a sealed box w/o regard to keeping it’s “output” seperate from that of the woofers.
I don’t understand how the two are so similar but still different. Would a variovent be better utilized if it could be set up like the former example?