The double rotor bass trombone with second rotor E tuning eliminates the need to pull the F slide to play low B, and maintains the advantage of having C and F in 1st position. This instrument not only has all the advantages of single rotor bass trombones pitched in Bb and F, but also by using the overtone series of the Gb valve, the player now has three horns in one; Bb, F and Gb.