I know this has been beat to death and I have read every post I can find including how 4 ohm loads stress an amp but I have yet to see the basic question answered and that is on the back of the amp it specifically states that when driving two pairs of speakers they must be 8 ohms or higher. So that would mean a 4 ohm load with two pairs of 8 ohm speakers in parallel. So why not a single pair of 4 ohm speakers? The KG-4 speakers are very efficient so they should not present a difficult load?