Radio shack had a small 9 volt Mixer that works just fine. I have found them on ebay for around ten bucks has four channel inputs in 1/4inch and lets you mix 4 into two or for into one get two that 8 channels
and also Do you have a broken nerous that you would like to part with? I am looking for spares Lost a display in one. I also lost a hard drive controller and a cpu board in one swoop in another . I wll cover shipping to take a chance on the one that failed for you. contact me at
wdshook@qwest.net and we can work somthing out..

thanks Walt