Posted by DMoore [ 71.39.40.4 ] on February 22, 2007 at 12:28:27:
In Reply to: Re: 1:1 throat area posted by Wayne Parham on February 22, 2007 at 11:04:50:
That example would be a multiple-flare horn or a "rubber throat". Not typical of a "straight" horn, though. Better used in a longer folded type bass horn to reduce throat impedance.
On the other hand, though, the 1978 EV midrange horn (Keele) US patent # 4,071,112 has 3 separate flare rates for purposes of bandwidth and coverage pattern. So there is no real limitation as to what you can do if you can achieve a balance of all the variables involved to arrive at your particular goals.
DM
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