Here I have 3/4 channel compressor you can combine all three together to get 12 inputs test them out turn all three on find the ones that work disregard the ones that don't you should come up with quite a bit of inputs that you can use as one app I will leave my phone number available to call me I will talk to you about these and show you exactly what to do all you need to do is have knowledge of what this equipment does so much as microphone singing equipment et cetera but you already know what this does if you don't do not purchase these I'm leaving my phone number here for you to call me I can tell you how to do this to get 1 amp out of all three of these you'll probably come up with more than you're gonna need my name is Tom give me a call I will help you out it's well worth the price these are high price France 1 is Samsung the other two are Behringer all four power up just fine LEDs willpower out and come back down showing you which channels are functioning I will give you a three day warranty you can check it out if you're not satisfied come get your money back with no problem at all I don't even care what the reason is you mean not just wanna but I doubt if you'll do that you're gonna get a lot of channels for your money that will go directly into your power amplifiers amp rack amplifiers DJ equipment