Reply to Help with turntable setup :)

Hey

So i currently have my setup containing 2 Technics 1200s, Kontrol S4, and Timecode vinyl, laptop blah blah blha

But for some reason, when i connect everything, i get a loud "hum" or "buzz" from the speakers...

Is there anyway to fix this?

The turntable is grounded, the Kontrol S4 is set to Phono, and all RCA cables are cleaned out

Any ideas?