I just found Terry Cain's BIB design. While I've found a ton of information, most of it references zillaaudio.com, which seems to be dead links.
Am I correct that this is a TQWT designed to be 1/2 wavelength instead of the standard 1/4?
If so, does that mean there is an opening? That would make sense, but most of the designs look like there isn't one.
Where is the driver placed? Is it the standard TQWT 1/3" the length of the pipe? Is the only reason to do an inverted BIB to place the driver closer to ear level?
Am I correct that this is a TQWT designed to be 1/2 wavelength instead of the standard 1/4?
If so, does that mean there is an opening? That would make sense, but most of the designs look like there isn't one.
Where is the driver placed? Is it the standard TQWT 1/3" the length of the pipe? Is the only reason to do an inverted BIB to place the driver closer to ear level?