u/Electrical-Skin7

Hello
Just set up my new vinyl setup. I have 2 Audio-Technica AT-LP120XUSB
Allen and Heath 23 mixer
Pioneer Dm40 speakers

I am having issues the sound only my left turntable only comes through my left speaker. Then the same for the right turntable only coming through right speaker.
The same for my headphones left ear left turntable and same for right

Does anybody have a solution for this as it makes mixing impossible
Any suggestions appreciated

Thanks