Have not heard the AU24`s but have read good things about them however, I do use Cardas Golden Reference in my system. They are warm sounding with great mid`s, smooth highs, big soundstage, very musical. That being said the Golden Reference is also revealing....not really ``hi fi`` revealing but ``live music`` revealing. They may not be for your system depending on your equipment and or room. Try a pair if you can, also the Cardas Golden Cross is a excellent cable that is warm sounding and musical and works very well with most systems just remember if you try any Cardas cable be patient with them because they do not like to be moved and take a long time to break/burn in....once they do they are wonderful sounding.
happy listening
happy listening