One thing you could do, is use a phono preamp by the turntable and use longer leads to connect to a line in RCA ports, like aux.
It is too far from my turntables to my AVP and so there is a preamp at each turntable. A Quad 22, a Quad 44 and a Quad 34. That also allows me to drop the volume dropping the stylus on the disc and turning up the volume. There are a lot of other benefits as well.