Sean...I guess that QTS is the parameter I had in mind, although as the writup suggests, it does not reliably describe vented/sealed suitability . The JBL 1500 QTS is 0.32, not far from the 0.4 suggested as the boundry between vented and sealed. I am sure that enclosure size, shape, and stuffing has a lot to do with it.
I could easily put a vent in my enclosures, but mice would probably take up residence. (Deaf mice).
I could easily put a vent in my enclosures, but mice would probably take up residence. (Deaf mice).