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The Edwards B454-E is an independent double bass axial flow valve system. Valves are pitched in F and Gb (combined to produce D). The independent setup gives players additional positions with which to work. With the open wrap design, the B454-E has a very open feel. These valves are very dependable and maintain the same sound on F, Gb/D, and Bb sides.
The B454-DE is a dependent double bass axial flow valve system. The second valve (D) will only work when the thumb trigger (F) is depressed. There is a more open feel with the dependent configuration as the second valve does not interrupt the airflow on the open side of the trombone. This combination results in the most free-blowing bass trombone made today. The B454-DE is no longer in production.
The B454-V-E is the ideal instrument for bass trombonists in need of options. The configurable second valve tuning allows players to change easily between Gb/D, G/Eb, and Blair Bollinger’s brand of tuning (designated “BB”) without costly conversions.
The B454-CR-E is an independent tuning system that utilizes the Power Bore Conventional Rotors. This instrument provides an increase in compression without the usual increase in price. The B454-CR-E valves are pitched in F and Gb (combined to produce D). Designed in-house to work in unison with the traditional modularity of Edwards, these valves have received great responses from anyone testing them in Elkhorn or around the world in performance halls.