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Paul S
San Diego, California, USA
Posts 2,672
Joined on 10-12-2006
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Post #:
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144
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Post ID:
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22851
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Reply to:
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22850
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fiogf49gjkf0d Yes, the "bottom drops out" of the "IB" depending on whether or how it's "opened", and one way or another, the cabinet may or may not "assist" the driver at some point. This is where one has to decide how much to ask from the particular driver or drivers. It seems like 50Hz is not too much to ask from some 15" drivers, and one "should" have some options, including IB or "modified IB", that best allow a given driver to "sing". With a fairly large box, it seems like there can be less "contribution" from either "stored energy" or "released energy" than there is from "strategically released", vented boxes, for sure. Of course, in theory, a typical sealed box simply "eats" the energy that goes into the smaller box, and there "is no penalty" from the cabinet. Too bad about driver membranes. Sure, it has to do with the particular driver, the particulars of the box, the amp or amps, and the room, not to mention system integration and personal preference. There are usually problems with adding significant deep bass under any musical mid-bass, if only because a new level of energy is required, and the extra power often requires a different approach than the rest of the system. I think most of the old IB speakers that people associate with the designation never had anything under them!
Best regards,
Paul S
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