4-channel Keyboard Mixer Cleans Up Your Act and Boosts Creativity So what's cool about Radial Engineering's Key Largo keyboard mixer? Only everything! Tour tough and super-compact, this mixer gives you dual analog inputs for three keyboards, USB connectivity for your laptop, effects send/receive jacks, two isolated and balanced XLR outs, and effects and sustain footswitches. It can even function as a handy 2 x 2 interface for recording through the USB port.A capable mixer with a tiny footprint The Radial Key Largo takes up less space than three keyboard pedals, but a lot of power is packed into that small chassis. On the rear panel, left and right analog inputs for three keyboards eliminate the need for multiple DIs. The EFX send/receive jacks let you throw your outboard effects on those vintage keys that don't already have them, and you get two mono outputs for monitors as well as left