Used Supro s6420 thunderbolt Tube Guitar Combo Amp

The Used Supro S6420 Thunderbolt Tube Guitar Combo Amp delivers classic vintage tone with modern reliability. In great condition, this amp features a 35-watt, Class A, all-tube circuit with a pair of 6L6 power tubes and a 6SN7 preamp tube for rich, responsive sound. The single 15-inch speaker produces warm lows and crisp highs, making it perfect for blues, rock, and beyond. With its simplistic single-volume knob design and two input modes—standard and high-gain—it provides organic tube saturation without complicated controls. Originally introduced in the 1960s, the Thunderbolt has been revered for its raw tube-driven breakup and dynamic articulation. Whether used for studio recording or live performance, this amp offers unmistakable Supro character with powerful projection and vintage aesthetics. If you're looking for a tube amp with straightforward functionality and legendary sound, this Used Supro S6420 Thunderbolt is an excellent choice in superb working condition.