OYAIDE NEO d+ RCA with Turntable buzz

Has anybody here used the d+ class B NEO RCA's with turntables before? http://www.neo-w.com/english/d-rca-series.html

I just bought a pair of green d+ class B series NEO RCA cables and I am using it to connect my pair of Vestax PDX 2000MK2 to my PIONEER DJM S9 phono inputs.

There is a noticeable hum with these cables but if I use a cheaper, normal run of the mill RCA cable, there is zero hum. I have ensured everything is grounded correctly too. Are these cables properly shielded for pre-amps?

Does anyone have experience with these?