Same warm, dark tone, and response, as the K11, for those who prefer a slightly softer reed. I use a very reed friendly facing. Optimized for Vandoren V12 #3 ½ reeds.

Tunes to 440 with a standard length barrel (generally 66 mm) Can play at 442 with a 65 mm barrel. Enhanced Lower Baffle for deeper and darker tone with reinforced lower harmonics.