These things are Metal monsters! I was just listening to a little Angelo and the bass slam was just awesome
Still breaking in and only had them 2 days but I am thoroughly impressed, many thanks to wje for turning me on to these. I have the 668b as well and am really impressed with Superlux, just like my other Superlux these sound awful out of the box but I just load 6 discs in my Onkyo changer and let them play for hours checking in every now and then. Each time there is an incremental improvement in sound. My HD668b's sound very good now and I have a feeling these new ones have even more improvement to go! They say 150-200 hrs and I believe it, they have a completely different sound than the 668b's.
I have the EVO's being fed this way ---> Oppo optical drive feeding a Maverick Audio D2 DAC (tube output) to my JDS Labs O2 using Esoteric Audio Graphis interconnect cable except the digital coax is an Monoprice 102681. Sound is very good.