Cannonball Mad Raven Bari-F# tonal quality

I've had a Cannonball Mad Raven Bari for a few months now; overall I'm very pleased with it. One thing I have noticed, however, is that the tonal quality of the alternate F# (opens the pad above the right thumb rest) is quite different than that of the regular fingering. I don't know exactly how to describe the difference, other than it has a much more stuffy, or less direct/centered quality. Is this a general characteristic of this model? Can this problem be corrected by an adjustment to the horn?

Thanks

SteveC