The Sound of Tube Amps with the Convenience and Reliability of Solid-State Peavey TransTube® Series guitar amps feature our exclusive TransTube technology, which emulates the sound of tube amplifiers with the convenience and reliability of solid-state design. The TransTube preamp tailors the gain level for the desired amount of drive, and the power amp responds to the preamp with the natural compression that increases with the amp's volume. The result is a line of amplifiers with widely ranging dynamics and natural "grit," just like a real tube amp.