From a November 2011 article found on mesaboogie.com: "The core of the preamp switching and FX integration happens via Mesa/Boogie Amp Switchers controlled with Digital Music Corp.’s GCX Expander switching units. The Boogie amps being switched are two Triaxis Preamp’s run into a 2:90 Power amp. One Triaxis is set to the Mark IIC+ mode while the second Triaxis is used for clean sounds in the Green Clean mode. Like Kirk, James also has DBX Quad gates and T.C. Electronic G Major FX Processors along with a few extra pedals kept in the rack. The signal runs out of the 2:90 into two Mesa Traditional Straight 4x12s for a true stereo mix." (original source: http://mesaboogie.com/news/2011/11/metallica-live-rigs/)more
"The direct signal of [the Axe-FX] goes into his ears, and then it goes into the Boogie 2:One Hundred and that feeds one set of speakers. And the other side gets split off into the Triaxis. So we're blending the Fractal amp modeling with the real Boogies," says Mike Derks guitar tech, at 17:50 in this rig rundown video, by Premier Guitar.more
While recording 2 A.M. Wakeup Call, Vrenna used some virtual synths, lots of outboard synths, live drums, a live acoustic guitar, a six-string Taylor and a nylon string guitar, plus he borrowed a couple of 12-strings from some friends for a couple parts. There is a lot of live bass on the record as well. "We used a five-string Fender jazz deluxe, which is a really good-sounding solid instrument, and it was all recorded through the Line 6 Bass Pod," says Vrenna. “We did some direct stuff with the guitar, but we used the Mesa Boogie Triaxis. That one is pretty awesome for direct I/O".more
I have it in a rack with Mesa Boogie Simul class 2 Ninety power amp.This is a classical combination.I use it mostly in studio.I control it with Abacus midi controller or MusicomLab Mk4. The TRIAXIS™ packs five 12AX7’s and 25 years of tube tone heritage into one rack space of pure magic. Eight separate modes deliver the elusive creamy gain of the Mark I, the heralded focus of the Mark IIC+, the scooped Rhythm of the Mark IV™, and a modified British lead mode. But these are just a few of the classic sounds at your fingertips. Our three years of research produced a patented technology which preserves in every nuance and detail the exact audio elements which made these classic sounds in the first place. The digital circuitry is forced to serve—not dictate the tone.
Each control’s up and down keys work much like an old style knob...all parameters are displayed and active all the time. That means no scrolling to find your Treble on the gig. You don’t have to wonder how your Bass and Mid are set, you can see them from across the stage.
You can store your favorite sounds into 90 user presets and these can be mapped to any of the 128 midi program locations. The TRIAXIS is an arsenal of the most powerful guitar tones available in the world today!