The Fender Blues Junior III is a 15 watt tube amplifier with a 12″ speaker designed by Eminence. The preamp is powered by 3 12AX7 tubes and the power amp by 2 EL84 tubes. The rectifier is solid state. A single channel amplifier, there are controls for volume (gain), treble, bass, middle, master volume, reverb, and FAT boost switch. Weighing in at around 31 lbs, the amp sports blackface style black/silver grille cloth and black vinyl covering in traditional Fender styling.