ok having now tried a pre amp to solve this issue to no avail i'm about to give in however i have a Numark TT turntable not sure what model to be exact only has phono connections with a ground which has worked on previous mixers but whatever i try i get white noise hum
tried most thing discussed here but there does not seem to be s definitive answer
Unless of course you know better
failing that what turntable works with the S4 mk 3