The medium leadpipe makes the Neptune sound like an American BAT and the larger one like a German Kaiser, so two different sounding tubas in oneoedipoes wrote:What do you use the larger and the smaller leadpipe for?
Seems like a very nice feature.
I mostly prefer playing my Neptune with medium leadpipe, fitting the larger one when I want a broader tone for a real contrabass tuba part such as Wagner Ring selection I played earlier this year.

