Neptune wrote:The rotary Neptune should still be considered a BAT even if it does look rather Kaiser like in appearance, as its sound is without doubt that of a American BAT which I would say is distinct from a Kaiser. A BAT has a broad enveloping tone, while a Kaiser is more direct.
I used to own a Neptune for 3 years+ until a recent upgrade (?) IMO to a Nirschl York, and if the York copy is classified as the typical "BAT", then I can say for sure that the Neptune is not even close to that specification.
The Neptune has a unique sound, truly like no other large tuba. It has some of the BAT broadness, and has its aggression. I wouldn't classify it as a "BAT-Kaiser" but I really have no way to describe this tuba's sound.
As mentioned earlier, the BAT has an easier pianissimo than other contrabass tubas. I recall myself playing in my quintet with the Neptune, back then when it was my only tuba, and I remember many "pffff air-only" embarrassing moments, this tuba was so hard to blow at some situations that never happen with my York. Today I can take the York to a quintet gig and sleep the night before peacefully.
The Neptune was my first owned tuba, and the first CC I ever played. My teacher kept telling it was a big mistake to buy it at the first place, not because it is a bad instrument, but because of the air it requires to play. The Nirschl York does not require less air to get the same results, but now I understand how the amount of air, let me correct myself,
air flow affects the color you want to get out of your tuba. BAT's are MUCH more friendly (not easy!) to blow and create the tone you want to achieve for the certain need (and this was tested for a long month next to a pt6).
I could "burn" or "brass-up" the tone much more easily on the Neptune, I'm not even talking about the pt6.