You asked & I answered: http://www.diyaudio.com/forums/full-range/165500-double-horn-tb-w4-657-a-4.html#post2200925
Generally to lower the baffle-step point; sometimes to change the wavelaunch / edge diffraction characteristics.
Generally to lower the baffle-step point; sometimes to change the wavelaunch / edge diffraction characteristics.
Some data on baffle-step losses: Baffle Diffraction Step
There are different ways of dealing with it, ranging from ignoring it, to employing some form of active or passive Eq, to using cabinet-gain to self-correct, or drivers with correction built into their response.
There are different ways of dealing with it, ranging from ignoring it, to employing some form of active or passive Eq, to using cabinet-gain to self-correct, or drivers with correction built into their response.
Let me add a couple pragmatic additional reasons:
1/ the driver is deeper than the box and cabinet depth needs to be increased. Often happens in a BIB, and i personally had this issue when i put FE103A into BK101.
2/ to cover a mistake up (ask Steven (aka Italynstallion) about this, not really his mistake)
3/ make it easy to try different drivers in the same box (our upcoming build of Maeshowe)
dave
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