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 Meinl Weston 2141 Eb tuba is an amazing instrument. At a 5/4 size with the large valve set this horn can produce a very strong sound in all registers. The 17.25" bell adds a lot of resonance as well. Add to this the 5 valve features and you have an unbeatable combination.
The Besson BE995 CC Tuba represents the first time Boosey & Hawkes has produced a front-action, 5-valve full size CC tuba. The BE995 is an exceptional professional instrument with a "four piston, one rotary" non compensating valve configuration. It is surprisingly lightweight, and produces a rich, colorful, clear and deep sound.