Upon it's introduction, the Mesa Boogie TriAxis Programmable Preamp set the standard for rack-mounted, MIDI Programmable, tube preamps.

90 Programmable presets to store your favorite iconic, pure analog sounds
8 Legendary Preamp Circuits deliver tones from the Mark I™, Mark IIC+™, Mark IV™ and more!
4 Programmable function switches

Digital disbelievers scoffed at the very idea of packing five 12AX7’s and 25 years of tube tone heritage into one rack space of pure magic...but there they are...five little tone bottles, glowing quietly-all too ready to rock the house. 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.

Most programmable preamps start with a digital control circuit and then adapt the audio to fit the confines of the digital framework. We weren’t about to compromise the audio just to take the short cut. Instead, our three years of research produced a patented technology, which preserves in every nuance and detail of the exact audio elements that made these classic sounds in the first place. The digital circuitry was 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. To you, 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.
Full MIDI with 90 Presets to store your favorite sounds
Separate displays simplify mapping
Separate displays simplify mapping
TriAxis 8 Preamp Circuits
Toggle through eight different preamp circuits
You can store your favorite sounds into 90 user presets and these can be mapped to any of the 128 midi program locations. To get you started, we’ve included 20 defeatable / retrievable factory presets, 10 of which can demonstrate SmartPower™ voicing options where TriAxis controls our power amps that feature SmartPower, switching their capabilities to further enhance individual modes and sounds.

Make no mistake—TRIAXIS IS an arsenal of the most powerful guitar tones available in the world today...and that’s without using the Continuous Control function. But don’t believe us, just listen to the likes of John Petrucci and James Hetfield who have used the TriAxis for decades.

Rhythm/Green - Vintage Fat Clean (Mark I, Black-face)
Rhythm/Yellow - Modern Hyper-Clean (Mark IV)
Lead 1/Green - Vintage Mark I Lead
Lead 1/Yellow - Vintage Mark 1 Gain Boost
Lead 1/Red - Classic British Lead
Lead 2/Green - Medium Boogie Gain
Lead 2/Yellow - Classic Boogie Lead (Mark IIC+/Mark IV)
Lead 2/Red - Searing Boogie Lead

Tubes: 5x Mesa 12AX7
Channels and Modes: 90 User Preset & 128 Midi Prgm Locations / 8 Modes
Mode Voicings/Styles: RHY = MK I Fat Clean & MK IV Hyper Clean
LD1 = MK I Lead, MK I Gain Boost & Classic Brit Lead
LD2 = MK IV OD, MK IIC+ High Gain & MK III High Gain
Graphic EQ / Reverb / FX / Solo Dynamic Voice EQ, FX Loop, Solo
Footswitchable Functions: Fully Programmable & Full Midi Continuous Control
Cabinet Simulation - Direct Live/Recording Output
Weight: 11 Lbs.
Dimensions: 2" H x 19" W x 15 1/4" D
Available Formats: Rackmount (1 Rack Spaces)

Year Condition Color Case
Call Brand New Black None


The Guitar Sanctuary
Brian Meader
McKinney, TX
3:26 PM
Store Hours: Tuesday - Saturday 10am to 6pm

The Guitar Sanctuary does accept returned items as long as arrangements are made for such within 48 hours of purchase/receipt. Returned items MUST be in the original condition and packing (including owner’s manual, un-used warranty card, any other items that came with the item) in order to qualify for a refund. No refunds are available for “special” ordered guitars or amplifiers (items that were not in stock, but rather ordered per the customers request. The customer is responsible for all freight charges and credit card processing fees incurred in the course of the sale. We cannot refund freight charges. The Guitar Sanctuary will charge a 20% restocking fee for returned effects pedals and amplifiers and a 10% restocking fee for Guitars. The only exceptions are for products that are defective.  Please only purchase an item after you are certain it is right for you! Layaway: You can lay-a-way any product for a maximum of three months. Lay-a-way requires a 25% non-refundable deposit. We will not be able to ship the item until it is paid for in full and as a lay-a-way purchase, does not qualify for the 48 hour approval policy. International Sales: We can ship most guitars and other products internationally. We prefer money orders, cashier’s checks, or bank wire transfers in U.S. dollars. Shipping quotes are only valid for 48 hours. Please consult with your local officials about taxes, duties, currency exchange rates, etc.