For my original black metal stuff, I don't need to go lower than your standard low E.
With my cover band playing country, oldies and some classic rock, I'll use drop D for a couple songs.
Sometimes I'll use my old Boss OC2 to get some lower tones.
A trick I have found when I want the occasional 'boom' and I don't have a 5-string or an octaver lying around, I'll play a power chord (root-fifth or root-fifth-octave). It gives the illusion of a lower tone.
Sometimes though, you just need a 5-string.
With my cover band playing country, oldies and some classic rock, I'll use drop D for a couple songs.
Sometimes I'll use my old Boss OC2 to get some lower tones.
A trick I have found when I want the occasional 'boom' and I don't have a 5-string or an octaver lying around, I'll play a power chord (root-fifth or root-fifth-octave). It gives the illusion of a lower tone.
Sometimes though, you just need a 5-string.