OT speaker cable - is it worth it ??

["jeremy2713" <jezjackson@xxxxxxxxxxxxxx>]

a little Off topic but someone may know.

I have been asked - as part of my home audio installation business
to wire speaker cabling from a central media room to various other
rooms in the home.

basically one amp (media room) supplying 4 other rooms speakers via
a speaker switch

The home owner does not want to go to the expense of having good
quality speaker cable, instead, normal 3 core electrical wire -
although this works, what problems may I experience with this.

wire is wire at the end of the day - isn't it ???

Jez