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Hi there I too am having this edgy issues with my ref 6 and am now only at 23 hours. It didn't sound like this with my ref5se when I got it new. The 1st time I hooked up ref 6 it sounded totally fine but after 6 hours in things sounded edgy and slightly compressed. For a moment I thought my tweeters was distorting. I swear I heard some crackling sound but it turned out to be some part of recording that I never heard before it seems to be an error from the recording itself. Now it is going through another phase where I feel that the sound is getting compressed and at times being pushed to its limit. My dealer said it is the caps that's running in and it will tend to sound less forceful and relaxed after 50 hours. One thing for sure the bass output is much more and the volume has significantly dropped from 50 in my ref5se to 30 in average from my ref 6.