"This is described as having a copper screen. In fact the cable is unscreened and is simply twin flex. It is therefore unsuitable as "speaker cable" to reduce cross-talk and loss of high-frequency fidelity. It can of course be used to connect speakers (obviously, it conducts electricity!) but then if you have the sort of equipment where it doesn't matter, you might just as well use ordinary twin flex - for that is all this is.