Great condition vox ac4c1blue tube amp. Here is the description from vox. VOX’s AC4C1 delivers the coveted sound of the AC30 Top Boost circuit in an all-tube, 4 watt Class A amplifier. An ideal choice for the home or the studio, the AC4 Custom serves up an array of authentic VOX tone through a Celestion 10” speaker and can even be paired with external speaker cabinet for more tonal diversity. This iconic low-wattage amp was first introduced by VOX in 1961 and is still the choice of many modern guitarists who are drawn to its mesmerizing tone and classic aesthetic. Whether you’re already a member of the VOX family, or you’re looking for your way in, no collection is complete without an AC4.