Voicing of B# Diminished 7

Drop 2 III

Back to B#dim7

Space plays and stops
Left hand
B#2
Right hand
B#3F#4A4D#5
Family
Drop 2

The Drop 2 III voicing of B#dim7 stacks B#, F#, A and D# from the bottom up: the root, flat 5th, diminished 7th and minor 3rd of the chord.

It's one of the Drop 2 voicings: four-note chords in close position with the second note from the top dropped an octave, played over the root. The others for B#dim7 are Drop 2 I, Drop 2 II and Drop 2 IV.