Posted by Wayne Parham on July 06, 2003 at 21:21:23

In Reply to: Tractrix Horn Loading posted by Adrian Mack on July 06, 2003 at 20:38:05:

You undoubtedly have some peaking in the horn design you are talking about that has increased output near the cutoff frequency. I often build conical horns with this same sort of response, so I'm not against this practice. But the fact is that the acoustic loading of tractrix and conical horns becomes less resistive at the flare frequency than it is further up, and this translates to lowered efficiency. A bump in the bottom octave from resonant peaking can be used to raise output instead.