Quote Originally Posted by Marco View Post
Nope, most certainly not, as that could potentially be lethal! Simply that, having a dedicated earth for your hi-fi, which is separate from the ring-main earth, is a sonically beneficial thing to do

Marco.
If you mean "in addition to", then so be it (though depending on the earthing arrangement provided by the supplier there might be safety issues). If you mean that your audio system is only earthed via this separate dedicated earth, then that could be dangerous under, albeit rare, fault conditions outside of your property.