Cables the diameter of your finger? What about inside the amplifier?
On this post I mentioned how extremely small the semiconductor junctions are inside your solid state power amplifier. It is those junctions of dissimilar materials where a small control signal (from your CD player) is boosted up into a big current millions of times greater, sufficient to drive your speakers. The semiconductor junctions are nothing more than a gate across a dam: the power supply is the dam or reservoir.
So, keeping our feet firmly on the ground, do we need speaker cables that are a) exotic in their construction or will bog standard (tinned?) copper wire do the job adequately b) do the cables need to be as thick as water hose?
Here's a picture inside a typical 50W-80W transistor amplifier (actually a Quad 306). One picture shows an overview, where I've marked the red and black output terminals: the other is a close-up where I've traced-out the signal track back from those terminals on the typical copper tin foil which is the track itself. For comparison you can see that the blue diode is about 3mm diameter.
Is there really any point in using chunky cable when the signal is running around inside the power amp on thin tracks? You decide.
Alan A. Shaw
Harbeth Audio UK