The Miraphone M7000 Ambassador EEb Tuba includes a lot of the same features of the M9000 Amabassador BBb. The features include a .709-inch to .740-inch conical bore plus a 4 valve (3 Top and 1 Side) compensating valve design that is an excellent choice for brass band work. The Ambassadors nickel silver mouthpipe offers a quick response for this 5/4 instrument.
The "S" version does not have the nickel-silver tuning slides and brace tubes. These are just polished and lacquered brass. This lack of nickel-silver trim gives it a darker sound. Heavier brass and valves make it one of the best tubas on the market for the money invested. Miraphone, quality throughout the line of instruments.