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That’s a Conn?

Ah, it’s a convertible horn. That explains the goofy leadpipe and valve circuit routing.
How are these horns?

Kirley wrote:Ah, it’s a convertible horn. That explains the goofy leadpipe and valve circuit routing.
How are these horns?

I've never played a 15J, but I've played a 12J, which is basically the non-convertible version and they're pretty nice. They're small bore (0.656) with a big flare. They've got a nice sound, but you can't push them too hard.