Was looking for some help.

I have just bought a set of these from EBay however they have came without any earth cables. (the earth cables are not attached like technics) I have used a couple of speaker wires & it seems to eliminate the buzzing on one of them but not the other.

I was possibly thinking the wire/speaker wire isn't the correct type or not thick enough?

Sorry if I sound stupid here but I am not technically minded at all.

Can anyone point me in the right direction?

Thanks