The CoolSWITCH delivers full A/B-Y switching, plus parallel common in/out jacks. It lets you switch a common source signal (guitar, bass or keyboard) between two amplifiers or amp channels. It also allows you to switch two source signals (like two different guitars) into the same amplifier. The CoolSWITCH features LED indicators that show whether A, B or Y routing is in effect. The Y-routing combines the “A” and “B” outputs in parallel so two amplifiers can be driven at once.