This tuba has been one of the favorite of bands and individuals for over 50 years. This like the Pro 186 except the taper on the conical section grows faster, is larger and it gives it a bigger, fuller and darker sound similar to that of a Kaiser tuba. Now with improved linkage and intonation, it is one of the best, still. 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.