The song karate on their original album... how did they get the guitars to sound so deep and whatnot? It can't be tuning, as the tabs on here are right, and they aren't tuned down. Is it just mixing? The fact that their guitars cost about 2000$ more than mine?

Or is that something I can do to my guitar to make it sound like that.
^ yea, that's pretty much all I can think of. or maybe the tabs just didn't mention to use alternative tuning
Epiphone G-400 Ebony
Line-6 UberMetal, EchoPark
Boss RC-2 Loop Station
Traynor YCV50Blue, Bass Mate 25, Guitar Mate 15