Bach’s Research & Development team examined the most famous horns in Bach’s history to identify the optimal weight, construction, material, and assembly of Bach’s valve cluster. As a result of their efforts, they produced a newly designed valve cluster delivering a faster response and a more vibrant sound. The 190S43 is the most balanced medium-large bore #43-style bell taper within the Bach portfolio. The #43 bell has found its match with an improved #26 leadpipe to make it the most balanced 43 ever. The larger diameter bell allows for the professional to control and handle the horn at extremes which has never before been possible with the #43 bell.