Two Rock is renowned for building high quality amps, influenced by the designs of Howard Dumble. This is their representation of the flagship Dumble, the Steel String Singer, which the production count is believed to be around a dozen total. This amp has a high power 150w design, giving it excellent headroom, but it also covers a wider tonal range than most guitar amp designs. In addition to a normal tone stack it has high and low cut stepped attenuation, allowing you to control the tonal character on the output side of the amp. Truly one of the most unique circuit designs out there, and Two Rock has done a wonderful job at executing on the magic that made the original so special!