Well tbh mate, I really don't know shit about different frequencies and stuff, I just do whatever I think sounds good, which usually means some pretty ridiculous E.Q. I'll give you a quick run down of what I do to get the tone I use, and that might give you a bit of a hand towards making your tone sound a bit better...
Guitars:
There are 4 tracks of guitars:
100%L
90%L
100%R
90% R
On gearbox I use the Big Bottom amp with these settings:
Then it has the 421 mic with 0% room sound.
After that it goes straight into cubase.
I use some pretty mad E.Q. straight on the guitar channels (all guitar channels have roughly this EQ setting, but I do it roughly each time so they're all SLIGHTLY different):
After that I run all of the guitars into a guitar group where I use the following plugins:
BBE Sonic Maximizer - both controls set to 1
Waves C4 - I literally just open it and pull around 4K up SLIGHTLY. Everything else is left the same. I pretty much use it like an E.Q.
Then I also send the whole guitar bus to a seperate paralel compression bus, and I actually usually tend to have the paralel compression bus up higher than the actual guitar bus, I'm not sure why I just prefer the way it sounds...
On the paralel compression bus I shove on a waves Rcomp and use (roughly) the following settings:
Bass:
I just record the DI of the bass, and then stick ampeg SVX on the bass channel with the "dark dist" preset. Then I fuck the shit out of it with PSP vinage warmer with the following settings:
I give it a nice big boost at around 3.5k (and I mean big like, 7/8 decibels big, I know I'm naughty
)
Then I just put it through to a bass group so that it's easier for mixing later and I can just adjust drums as a group, guitars as a group, bass as a group and then vox as a group. And I shove another Rcomp across the bass group with literally the exact same settings as I used for parallel compression earlier.
Hope this helped dude, if you want any other details on anything feel free to give me a shout