The Solodallas USA Solo-X Boost Guitar Effects Pedal faithfully reproduces the signature "Schaffer Sound" associated with some of the best guitar tones ever produced. The Schaffer Boost - Solo-X is the all-analog boost and equalization expansion circuit from the famed Schaffer-Vega Diversity System wireless used by David Gilmour, Angus Young, Eddie Van Halen, Joe Perry and an endless list of rock gods throughout the 70s and 80s. Features BOOST knob controls our vintage boost circuit capable of generating a