Amps used on DT albums (probably not a complete list):
WDADU - solid state Randall amps
I&W - Quad/295 or Triaxis/2:90, JC-120, 50w Marshall
Awake - Mark IIC+, Dual recto, Triaxis/2:90, Blue Angel
ACOS - Mark IIC+, Dual recto, Triaxis/2:90
FII - IIC+, IIB, IIC, Tremoverb, Triaxis/2:90 etc (a lot of stuff)
SFAM - IIC+, Dual recto, Mark IV, Formula preamp
6 degrees- Dual recto (on Glass Prison mostly), IIC+ (main amp)
TOT - Roadking
8va - Roadking, Lonestar, Mark IV? (at least according to one JP interview)
SC - Mark IV, Lonestar, IIC+ (used as poweramp on some songs), Triple recto? (seen on the making of), RK? (JP mentioned that he used the amp on this album in an interview).
Other JP albums:
LTE 1 -Triaxis/2:90
LTE 2 - Mark IV, Formula preamp? (may have been used for clean stuff)
SA - Roadking (on most of the album), Mark IIC+
Live amps:
I&W tour - Triaxis/2:90 (2 of each).
Awake tour - Triaxis/2:90 (2 of each), Mark IIC+.
FII tour - Triaxis, Mark IIC+, Mark IV, two dual rectos (used as fx poweramps), two 2:90 poweramps.
SFAM tour - Triaxis, Formula, IIC+, IV, dual recto, two 2:90 pa.
6 Degrees tour - three IIC+ (one for clean sounds and two for poweramps) Custom made ("Nunya") 2 ch IIC+ preamp for distortion sounds.
TOT tour - Three Roadkings (two run in stereo and one backup), two Lonestars run in stereo.
8VA tour - Same as above, except for the last leg of the tour: Custom made "Nunya" preamp, Formula preamp, 2:100 (recto) poweramp
SC tour - two Mark IV run in stereo, one Lonestar (probably) run in stereo through the Mark IV poweramps.