When Swedish metal icons Meshuggah unleashed their mighty, low down, single-string riffs on Nothing in 2002, the meaning of the word heavy was henceforth redefined. From then, the 8-string guitar has ...

"Heavy metal and drop D is a match made in heaven," Soundgarden’s Kim Thayil once said, and for heavy rock riffs and thick-sounding chords, drop D is hard to beat. It's a simple one to set up, too: ...