The Great American Sound (GAS) Son of Ampzilla. This was my first amp in the high end arena and I have held onto it all these years. I have been through many others, both tube and solid state, and there has never been that feeling of, Oh, I just can't bear to part with it. After pulling the Son out of moth balls for so many years, I was able to establish what this amp did that others didn't; the entertainment factor of the Son was so much better. It was sent off to GAS Audio for a reference rebuild and it is so much better. It is so much better that I haven't even started work on my Golden Tube Audio SE 40 Special Edition putting in a full-tilt Sonic Craft mod.