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Hi Mike

I still have the adjustable cup MP that Mr Jacobs gave me and you unstuck. Guess what? It's stuck again!

This was made by Schilke and is probably based on a cup size from a Schilke 62 to a 66 or 67. It comes in handy finding the right mix of fundemental and overtones. I've used it in just one spot that I liked or adjusted it while playing, opening it up for a larger sound or closing it for more clarity especially in technical passages.

A great toy but getting one made these days costs a fortune.

A whole different twist on dialing in your tone.

I've got a "Kingross" almost identical to Mike's. Got it from Don Little decades ago, who claimed it originally belonged to Mr. Jacobs. Works great on the cimbasso when dialed all the way in.

I have that same KingRoss mouthpiece, and used it exclusively for many years. I think the 'piece was designed by Walter Sear; I bought mine from him a long time ago. I shifted to the Doug Elliott system a few years back, but the King Ross served me well.

Mike Johnson wrote:Kirzwiki (sp!)

Paul Krzywicki

FWIW

Walter Sear used to use an adjustable mpc similar to that one.
When I was very young somebody brought a spring-loaded adjustable bass trombone mpc to show my father. We tried it in my Eb tuba, but I couldn't make it work because I was using too much pressure at the time. I remember that he had removed half of the springs to make it more sensitive, and that he said he could not blow cigaratte smoke through the sliding part. (That seems to be a rather poor criterion, but he liked it.)

Unless he's quit doing it, you can still have Gerry Endsley in Denver make you an adjustable cup mouthpiece. Not horribly expensive.