Can't speak for the DK but I've been using the CAP 151 to drive my Apogee Slant 6s (83db) and the amp is great Runs cools, very musical and never have experienced any sign of strain. I can say (in my rig) it may sound a bit cool and maybe polite at times but... that is my perception and I listen to soft rock, blues,jazz and new age but, you can listen to it for hours w/o listening fatiuge either. I also upgraded the PC and it made a very positive difference as well.