I have 3 keyboards running through my KB5. I play 2 and my bro is on the 3rd on. Its not distorting or anything, but the sound isnt mixed well I guess. For example, if my bro is playing a piano or bright piano patch and I have a rhodes type of sound, you can tell the difference, but the clarity isnt all the way there. I hope Im making sense. Should I buy a mixer and connect it to my KB5? If thats the case, how do I go about setting it up? I really just want to have the best mix possible. Thanks in advance.