Mesa Boogie Express
The Mesa Boogie Express amps were released in 2007. Sporting new amp technology from Mesa Boogie called "Duo-Class", the express series amps have the ability to run the power section in either "class A" or "class AB" mode. This allows the user to push the amp harder at a lower volume.
The two model in the Mesa Boogie Express line are the 5:25 and the 5:50, rated at 25 and 50 watts respectively. The 5:25 has two el34 tubes in the power section, compared to the two 6l6 tubes in the 5:50. The most portable powerhouse in the line of Mesa Boogie amps.