JP Sterling One stop enabled me to try three different horns I was interested in testing: the JP Sterling 4-valve compensating Eb Tuba, 3-valve compensating baritone horn, and 4-valve compensating euphonium. DF Music had all those, and several other horns, on display for testing. The tuba did not take me very long at all. I quickly discovered that my tuba chops were apparently still back in Minnesota that day. At first the horn seemed stuffy, but then I realized it was my chops ...