What is Open B tuning?
Tune to B F# B F# B D# for a low, resonant B major chord on the open strings. The notes below are listed from the thick sixth string to the thin first string.
How to tune from standard
- Lower the sixth string from E2 to B1.
- Lower the fifth string from A2 to F#2.
- Lower the fourth string from D3 to B2.
- Lower the third string from G3 to F#3.
- Leave the second string at B3.
- Lower the first string from E4 to D#4, then recheck every string.
B F# B F# B D# target frequencies
| String | Note | Frequency |
|---|---|---|
| 6 | B1 | 61.74 Hz |
| 5 | F#2 | 92.50 Hz |
| 4 | B2 | 123.47 Hz |
| 3 | F#3 | 185.00 Hz |
| 2 | B3 | 246.94 Hz |
| 1 | D#4 | 311.13 Hz |
How it feels and sounds
The low B and repeated B/F# notes give this tuning a deep, focused major-chord drone. It suits slow riffs, slide textures, and arrangements built around sustained open strings. Standard chord shapes no longer apply directly.
Setup and tuning stability
A heavier string set and a longer scale can improve definition at B1. Large gauge changes may require wider nut slots, truss-rod adjustment, and fresh intonation. If you only experiment briefly, play gently and expect a softer response.
Practical tuning routine
Tune slowly, use a light attack, and make the final adjustment by approaching each pitch from below. After all six strings are close, repeat the pass because changing one string changes neck and bridge tension slightly. Check again after a minute of playing.