Almost 100 hours and I can notice the treble getting better as well as bass (punch, tight, powerful, excelent definition, subwoofer-like experience). Mezzoforte - Live in Reykjavik - Prime Time (Jazz), at 4 mins. a drum solo. Best experience I have ever had with a drum solo (more than with the UM3X). For moments I thought I was there. My mouth was open. Not to mention bass notes. Slap, etc. It's so realistic. Sub-bass can't stop impressing me every time, it's like a sub-woofer, such is the power and strength and speed. Overall the experience with all the album is excelent, I can feel it all more than with the UM3X (I didn't like this album much with the UM3X). Treble's good with this recording. Separation and 3D imaging is magnificent. I hear sounds coming from everywhere, 360º. Put the GR-07's or Sony EX1000 here and you feel nothing.