brucethehoon wrote:I truly love my M3 and can't imagine it getting any better, therefore I'm trying to improve it. I believe this sums up the DIY audiophile experience nicely.
I'm currently sporting the AD8610's in my M3. I've heard people suggesting that the OPA627 is superior (opinion and all that). Just wanted to get an impression from anyone that has one on the value of changing over.
i think that there are subtle differences between the various opamps i've rolled, but not night and day. it's all subjective - your HPs and priorities may be different. i'm not a fan of the OPA627 in the M3, but would recommend you try it. it's a bit too limp and laid-back for me. the AD8610 has a very "neutral" sound that i like, but slightly prefer the AD843 for it's more energetic sound, having a forward mid-range and mid-bass "bounce".
i would also consider playing around with the bias a bit, provided you have apropos heat sinking and ventilation. i really like a bias of 160mA with the AKG K702, but it's far too much bass and warmth with the Denon D2000 and Fostex T50RP. i personally wouldn't go any higher with a 25VA transformer. right now i've settled on a bias of 100mA since the K702 aren't getting much love these days.