Don't think that low end hifi does not have any effect when using better speaker cables. Even for low end hifi, better speaker cables will allow it to perform better and make full potential of the machine. Of course, I don't recommend you to buy very high end cables for low end machines. Normally, we spend 15% budget of the hifi system on cables. So for $10,000 system, you need to spend around $1,500 for cables.