: I used for several years the KK KCAG ( unshielded. ) as a phono cable with extraordinary results.
Now, you have to check internally the TT ground conection and if broken you just change it.
In the other side your KK phono cables must be away from transformers that comes in electronic audio items and has to stay away from electrical power cables and does not run parallel to this kind of power cables.
If you can try that the tonearm stay grounded too.
If hum persist then change the KK position. You can check ( live. ) in what position ( between TT and phono syage ) that hum goes down and fix it there. Sometimes we have to change the TT position because of that hum.
Btw, which kind/model of TT are you using? sometimes it's through the cartridge that that hum comes because it pick up from the TT motor that can comes with bad shielding.
Regards and enjoy the music,