This guitar is known for a 7th string placed lower than the low E string. Many 7 string guitar players will then detune their guitar to an insanely low tuning: D, C#, or C! The high output humbuckers give this guitar its hot sound.
Let's look at how it works and hear how it sounds. We'll play it with a high gain distortion pedal, but not so high gain that you can't hear the distinction in the pickups.