The Drop B tuning is a deeply resonant and aggressive setup, primarily favored in genres requiring a massive low-end, such as metalcore, deathcore, djent, and other forms of heavy and progressive music. While sometimes described as "Drop C down a half step," the specific configuration of Drop B (B1-F#3-C#4-F#4-A#4-D#5) carves out its unique sonic identity, characterized by an exceptionally low bottom end and versatile power chord shapes.

Verbally, this tuning delivers immense power and a thick, guttural sound, perfect for crushing riffs and breakdowns. The extremely low B on the 6th string creates a sonic foundation that can feel almost earthquake-like, allowing for very heavy chugging and dissonant textures. The "drop" aspect, where the lowest string is tuned significantly lower than the others while maintaining certain intervals, makes it incredibly easy to execute power chords on the lower three strings with a single finger, a hallmark of heavy guitar playing.

Technically, the open strings are tuned to B1-F#3-C#4-F#4-A#4-D#5. This means:

• The 6th string (B1) is tuned five semitones lower than standard E, providing the signature low rumble and extending the guitar's range significantly downwards.
• The intervals between the lowest three strings (B-F#-C#) are perfect fifths, maintaining the power chord shape for easy barring across these strings. For instance, barring any fret on strings 6, 5, and 4 will produce a power chord (e.g., 2nd fret = C#5).
• Noticeable is the presence of F# on both the 5th string (F#3) and the 3rd string (F#4), an octave apart, which can create interesting harmonic resonance and drone effects when strummed openly or used in riffs.
• The upper strings (C#4-F#4-A#4-D#5) feature intervals of a perfect fourth (C# to F#), a major third (F# to A#), and another perfect fourth (A# to D#). This structure, while not forming a common open chord, offers unique voicing possibilities and a generally darker tonal landscape for intricate melodic lines to stand out against the heavy backdrop.
• Chords that are easily accessible include heavy power chords on the lower strings (6, 5, 4) by barring. The overall open tuning provides a deep, slightly dissonant texture when strummed openly, lending itself more to single-note riffs and two or three-string power chords rather than traditional open chord voicings.

This tuning is an excellent choice for musicians looking to explore the heavier, darker side of their instrument and achieve a truly massive sound, pushing the boundaries of standard guitar tonality.

Open String Notes:

• String 6 (Low E): B1
• String 5 (A): F#3
• String 4 (D): C#4
• String 3 (G): F#4
• String 2 (B): A#4
• String 1 (High E): D#5

How to Tune (from Standard EADGBe):

• String 6 (Low E): Tune down 5 semitones to B1. (Warning: This is a significant drop. For optimal performance, intonation, and to avoid potential string issues, a heavier gauge string is strongly advised for this string.)
• String 5 (A): Tune down 3 semitones to F#3.
• String 4 (D): Tune down 1 semitone to C#4.
• String 3 (G): Tune down 1 semitone to F#4.
• String 2 (B): Tune down 1 semitone to A#4.
• String 1 (High E): Tune down 1 semitone to D#5.

Always tune carefully and incrementally, checking intonation as you go. For changes exceeding 4 semitones up or down, especially on the lower strings, considering a different string gauge can help maintain proper tension and intonation, as well as protect your instrument from unnecessary strain.