Quartposaune
Quartposaune (Ger.), 17th- and 18th-c. term for the bass trombone in F, a 4th below the (ordinary) tenor trombone in B♭.
Quartposaune (Ger.), 17th- and 18th-c. term for the bass trombone in F, a 4th below the (ordinary) tenor trombone in B♭.