#1
you know what I'm talking about. The nice wetness from gain on amps. Any amp can have it, but what makes it happen? And why do certain amps have dry, muddy gain situations? Looking to understand this idea. Asked here cause you guys should know what you're talking about.
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#2
Umm...Heh? Are you talking about different types of tones?
Like...say...This tone:
http://www.youtube.com/watch?v=VJpyWrNNifo

Versus...err...this one:
http://www.youtube.com/watch?v=B9-eAYHooUo

If so, they're achieved by two different methods.

The first tone is achieved by working the power section of an amp hard. Basically, cranking it really loud.
The second is achieved by turning up the preamp gain.
#5
It's because of the way tubes amplify frequencies. Digital emulation comes close, but hasn't nailed it yet. Solid state over drive and clipping sound much different than tube over drive and clipping because they are completely different devices that don't work the same fundamentally.
#6
Tube saturation comes from midrange. High end and low end do cause the tubes to saturate as well, but it's not generaly thought of as a good thing. Marshall amps and fender tweed amps are though to have good tube saturation because they use a .02 cap in front of the phase inverter which lets more midrange through. Fender blackface amps are thought to be "clean amps" because they use a .005 cap in front of the phase inverter which scoops the midrange.
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