Had to take to take the cat for a quick vet visit today. As soon as I got home, I got to testing. All testing was done on ZX300 DAP to SMSL SU-8 DAC to Liquid Spark amp. Feeding either brand new X2HR's or well used Senn HD58X's.
First off was Florence and the Machine - Leave my Body = HD58X by a mile. End of story, I am right!
Secondly it was various Grandson = X2HR sounded much punchier. What?
X Ambassadors/Jamie n Common - various = HD58X by a bit. Yes sir I am right!!
Incubus - various = X2HR's by at least a bit. What????
I then went into various Steely Dan and 70's classic rock looking for anything bassy. I really couldn't tell a difference. After a couple of hours it was "just flip a coin". I did volume match for the first several songs and then I just started going by feel. The Senns area bit harder to drive, but not by much. The knob difference is like 10:00 and 10:23.
I must admit that I am surprised at how close it was. I started the day out thinking the X2's were history but I kept an open mind and they have proven their worth so far.
Tomorrow I will try the same test with my SMSL SP200. IMO, this amp does no headphones any favours, so this will be interesting.
Shane D