B chord inversions
B/D# and B/F# are the first and second inversions of the B major. This means that the bass tone is shifting from B to D sharp or F sharp. Both these chords are also referred to as slash chords.
B/D#
B/F#
Try in a chord progression
C#m - B/D# - E
B - B/F# - E
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Theory of the B/D# and B/F# chords
Both chords consist of the notes B, D#, F#. The difference is that the order of notes shifts. D# is the bass note in the first inversion and F# is the bass note in the second inversion. A comparison between the main B major and the two inversions can be seen below.
Alternative fingerings
B/D# can also be played as X6444X.
Alternative chord names
B/D# is identical with D#m#5.
B/F# is identical with F#6sus4.
See also B7 inversions | Bmaj7 inversions
Chord construction
B x - B - F# - B - D# - F#B/D# x - x - D# - B - D# - F#
B/F# F# - B - F# - B - D# - F#
Guitar versions of the chord
Notes in chord
B B - D# - F#B/D# D# - F# - B
B/F# F# - B - D#
Only the order of notes differs