Here is a demonstration of the tone of my 1964 Gretsch Chicago-made Valco Model 6150T Guitar Amplifier. It has an 8" Jensen speaker and uses 1 6V6GT tube in the power section and 2x 12ax7a in the preamp. All tubes are original RCA.
The guitar is a 1966 Hofner 459 VTZ Super in Natural finish.