Description:

MESA 12AX7's are premium grade preamp tubes that provide the maximum level of high gain output and overall tonal quality with unsurpassed consistency and reliability - They possess a smooth and balanced response across the tonal spectrum and are extremely lively, open and expressive.

Mesa Boogie starts with only the finest tubes available from around the world. They then test and match every tube, while under the stress of actual operating conditions, to the tightest, most demanding specifications in the industry with the use of the Mesa Boogie proprietary, aerospace designed tube analysis system called Robotube™. They accept only the "finest of the finest" and back them with the best warranty in the business for a minimum of six months.