Originally posted by paulmaybery
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- Helicons were (mostly) not "American".
- Helicons (mostly) had rotary rather than piston valves, and piston valves had come to be strongly favored, particularly in American organizations.
- Sousaphones had much larger bores and more "power" (directional or not) than the smaller helicons.
- Helicons (and similar things like oval euphoniums) are something of a pain in the neck in large (particularly seated) ensembles since the sound source is directed into its neighbor's ear. If you have ever sat to the left of an oval euphonium player, you would know what I mean.
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