The initial expansion is a conical round to rectangular transition to cover most of its BW, then an expo flare AFAIK [haven't reverse engineered it] to cover the low end, overall pattern control.
GM
The initial expansion is a conical round to rectangular transition to cover most of its BW, then an expo flare AFAIK [haven't reverse engineered it] to cover the low end, overall pattern control.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
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