Sound on Sound magazine was royally impressed with the Supro Blues King.
“Played with the Boost and Gain switches off, the Blues King 12 exhibits a lively, touch-responsive clean quality that teams well with drive pedals. Bring in the Boost and the sound takes on both punch and a slightly driven edge, responding well to playing dynamics. There are some classic blues sounds to be had here, especially if you add a hint of that authentic spring reverb to take off the dry edge. Engage Gain and you’re into rock territory, and with all the tone controls near their centre position, the tonality is bright and cutting, reminiscent of some early Led Zeppelin records.”