To be honest, you do not necessarily need a double-register to play well.The Saxist said:Just starting to dabble in BC doubling. Does a Bass need to have a double register vent to be able to play easily up high? Does anyone here get good results from single vent horns? My current point of ref is a borrowed (read: beatup) school horn Vito. Does not speak well above top of staff G. space5: ) "A" just above line6: ) is really iffy... I can get into altissimo, but the intonation is all over the map.
For instance, I am able to play an Artley plastic bass clarinet throughout the whole range. It took a lot of practice in order to achieve this.
However, an easier solution may be to get a Grabner, or a Fobes mouthpiece. After I received my Grabner LB, it made playing all the bass clarinet notes seem ridiculously easy.