Also note, the lower you tune a guitar, the more finicky it is to tune correctly. This has to do with math and frequencies and other shit musicians don’t like to think about, but what it comes down to for us in the practical sense is scale length.
Scale length is the distance from the bridge to the nut. It affects lots of things from tone, to feel, to tuning stability. Gibson standard is the shortest, at 24 3/4 inches. That’s why that Les Paul is always begging for you to bend notes until they cry.
Fender standard is 25 1/2 inches, and that’s really become THE standard – Ibanez, Schecter, ESP, Dean, all the boutique makers (the Kiesel I’m desperately waiting for, the high side of my fanned Ormsby), etc.
PRS is kind of a standout – they went in the middle, with 25″ even. Personally, that’s my favorite for standard or Eb tuning.
Now, what’s the point of mentioning all this?
Because when you get to LOW tuning, you think baritone. A baritone guitar (B standard tuning) or a 7- or 8-string guitar, they have a 26.5″ scale.
A bass guitar may have a 30″ scale. Hell, the guy from Killswitch Engage’s bass is a 34″ scale.
Why? Because the lower you tune, the more string length you need to find the happy place.
So. What did we learn?
Tuning a normal 25.5″ scale guitar down to Drop B is going to be really TRICKY, but not impossible to keep in tune.
Because math. FUCK MATH.