Schilke Cornet 14A4x

I've recently switched from playing solo cornet to soprano cornet in a Championship Section british bras band, and needed a mouthpiece a little shallower than the Wick Heritage S to have stamina and power in the upper register. As a warbing to other Soprano players, this mouthpiece is insanely shallow. It makes the extreme upper register far easier, but the sound quality and power in the lower and middle registers is vastly reduced. The mouthpiece is very comfortable to play on, but due to its depth (or lack thereof!) it becomes very hard work to even produce a sound. I have since switched from the 14a4x to a slightly deeper mouthpiece in order to get the ease of upper register, without losing as much of the sound.