Gramophone Test No. 1: 100 Hz Exponential Horn vs. 150 Hz Tractrix Horn

A while ago, I made a small tractrix-ish horn from corrugated cardboard-technically, it isn’t actually quite a tractrix, as I used the perimeters of a round 150 Hz horn for the perimeters of the actual twelve-sided one, so the areas are slightly off; but at any rate, I thought it would be interesting to see how it compared to the exponential horn.
It isn’t quite a fair comparison, because the tractrix is supposed to have a 150 Hz cut-off and the exponential is supposed to be 100 Hz (although it actually seems to cut off closer to about 130 Hz), and because the lid can’t be closed with the tractrix horn; but it’s still interesting to hear the differences.
In person, the tractrix horn sounded brighter and clearer than the exponential, although sometimes to the point of being rather harsh; the exponential sounded much fuller, with noticeably stronger bass, but also seemed a little muffled at higher frequencies by comparison-unfortunately, it’s hard to say whether the tractrix’s brightness was due to the fact that it is a tractrix, or just that it’s a straight horn. I also used different soundboxes, but they were both late Orthophonic types, and generally sound fairly similar.
Both horns were tested using a Burmese Colour Needle and Victor record 22272-B, "Cryin' for the Carolines" by Waring's Pennsylvanians.