#1
do you think if i change my tubes will i get a hotter tone? I heard russian tubes are the hottest thing right now, any word on this?
FlickR
iBanez Rg550 20th Anniversary.
iBanez GRG170DX W/ Dimarzio Steve's Special
VTM 60 Tube Head
Carvin Legacy Vai Cabinet 4x12 Cabinet
Boss SD-1 Super Overdrive
ZW-44 Overdrive
Zakk Wylde Signiture Wah
#2
You can change your tone with different tubes. Also, how they're biased with affect how they sound as well. You can bias them hotter, or colder.
#3
What kind of tubes are in mesa's.
FlickR
iBanez Rg550 20th Anniversary.
iBanez GRG170DX W/ Dimarzio Steve's Special
VTM 60 Tube Head
Carvin Legacy Vai Cabinet 4x12 Cabinet
Boss SD-1 Super Overdrive
ZW-44 Overdrive
Zakk Wylde Signiture Wah
#4
Typically, they use 6l6/El34 (interchangeable after biasing).

I'm not sure if they have amps that use any other tubes.