Original Mesa 12AX7 preamp tubes play a remarkable, dynamic role in the creation of the final tone in your vacuum tube amplifier. 12AX7s are components, early in the circuit, that determine how clean or, how lush, layered and massive the high gain will be – not to mention all the tonal shades of grey in between like clipped, overdriven and crunch sounds. MESA® 12AX7s provide the stability AND high gain required for extraordinary distortion sounds while at the flick of a switch, deliver the sensitivity and brilliance needed for some of the world’s most detailed, crisp clean sounds as well as the subtleties of the in between gain ranges.
Stock preamp tube for all MESA/Boogie Guitar & Bass Amps,
Preamps & Power Amps
Please note that we have increased the weight displayed of the valves, this is to ensure that we can suitably package them for shipping.
Sold as a single in retail cardboard valve box packaging.
If you need a Mesa repair and are local to East Herts or West Essex, we’re an authorised service warranty centre for Mesa. Read more about Mesa repairs