Boss GM-800 Guitar SynthesizerBoss GM 800 Guitar Synthesizer With power supply, manual, box GM 800 Guitar Synthesizer BOSS Guitar Synthesis Evolves with the Power of ZEN Core The GM 800 elevates guitar synthesis into a new age of natural playability and boundless creative range. Driven by the newly developed Serial GK interface, the advanced ZEN Core engine unlocks any sound imaginablefrom acoustic instruments to classic and modern synthswhile high performance DSP delivers