Mesa/Boogie Fifty/Fifty Stereo Tube Power Amplifier Rack Mounted Unit

The Mesa/Boogie Fifty/Fifty Stereo Tube Power Amplifier delivers pure, dynamic tube power with the warmth and punch that define Mesa engineering. Featuring 50 watts per channel from a quad of 6L6 power tubes, this dual mono design brings clarity, depth, and headroom to any rack rig.

With independent volume and presence controls, fan cooling, and Mesa’s fixed-bias Class A/B circuitry, the Fifty/Fifty provides studio precision and road-ready reliability. Built in Petaluma, California, it’s a favourite among touring guitarists and studio professionals for its rich harmonic response and legendary build quality.

• 50 watts RMS per channel stereo tube power amplifier
• Class A/B configuration with Mesa’s fixed bias for consistent performance
• Four 6L6 power tubes and three 12AX7 preamp/driver tubes
• Independent Volume and Presence controls for each channel
• Dual mono design for true stereo operation or bi-amping
• Hi/Low power switch for dynamic control of headroom and feel
• Fan-cooled chassis for reliable long-term operation
• Two rack-space (2U) rackmount enclosure
• Standard 6.35mm input jacks and speaker outputs per channel
• Designed and hand-built in Petaluma, California, USA
• Renowned for rich harmonics, strong low-end punch, and sparkling clarity
• Perfect match for rack-mounted preamps like the Mesa Triaxis or Rocktron Piranha
• Rugged steel chassis built for studio or touring use