I have a Technics SL-3310 turntable which I connect to the phono input of my amplifier. The turntable has a short RCA cable coming out of it. The turntable and amplifier are far apart from each other, therefore I use a female-to-female adapter to attach the turntable RCA to a longer RCA, which ends up in the amplifier.
Now the turntable has a grounding wire as well that should be attached to the amplifier. That wire is also short. Without attaching it there is some buzzing.
I attached it to the RCA adapter and now the buzzing has stopped, but I'm wondering if this is somehow bad for the amp or turntable.