Power cables are a different matter. At no point in use do they carry signals–they simply convey power from your home’s main supply to your devices’ power supplies.

Do power cables make a difference?

For example, an “audiophile” cable can make bass notes even better, typically “more powerful”. The high end might sound “sweeter” and “more extended”. Well, as you can see, at a typical 1W output which is not an unusual, normal playback level for home systems, there’s no difference between the two cables.

Can I use power cable for speakers?

Yes you can use electrical wire for speakers. My experience is that solid core with a cross sectional area of 2.5sq mm works well. However, different types of cable do sound different.