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.
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.