I bought this mouthpiece with the intention of using it on my C tuba (MW5450) as the mouthpiece I had been using previously was too big and hard to control - this new model however I find works absolutely fantastic. It makes high register playing and flexibility so much easier, with no compromise for tone and the low register now played like a dream, so much easier than before. Another benefit is I use the Bobo Solo model mp on my F tuba, so the Symphonic being of the same series makes it easier for me to switch between C and F, both having a similar feel and response in relation to each instrument.