imperialbari wrote:Using a Cerveny rotary F valve trombone for jazz may lead to some disappointment.
The Czech/German and the US ideas of trombone sound are very different. The US ideal being much more alive and bright.
The valved F-bass trombone is known from from the older Czech-German tradition, but it was never very common. Some research points towards Dvorak having written at least some of his orchestral trombone parts for a section of valve trombones.
I have considered this Cerveny for some years, but I did not like the fairly small bore (smaller than even small euphoniums) and the lack of full size bass trombone receiver.
I did find a Josef Lidl 4 valve Bb that I am trying to talk myself out of. It is a .520 bore with a 9.25 inch bell.