So, I've had my 4007 for a couple of weeks now, but I only have played it for about 5 hours.
I had 2 dedicated 20-amp lines run for it and my ATI 1505.
I don't know what to think at this point. I definitely have to turn the volume up to get it to "wake up" so to speak. I recalibrated everything with an SPL meter. It is softer in the highs as well. Which is kind of a positive and a negative. I use a song that I am very familiar with for all my listening, and I am not hearing some of the detail I hear with the 1505. It does seem that the bass has more authority, and the soundstage is huge like it was with the 1505.
The treble is just a bit softer. I have always felt that the 1505 was almost on the bright side but missing some detail with the 4007 doesn't make me happy.
I am speaker shopping also, and it seems like more and more speakers are err-ing on the brighter side and so maybe it will open up more options for me with it being more laid back?
And while I don't believe in break-in for electronics, I wonder if some will happen as I get more hours on it?