Originally Posted by Sylverant
In your opinion, how does the LME49990 change the sound in comparison to the stock opamps?
Making the sound more neutral, the bass isn't as prominent, the bass is still very good though, it has a sweeter edge to it. I have a feeling the LME49990 is a better long term solution. I switched my headphones earpads as well from pleather to velour now, and I think I prefer the LME49990 without Dolby. What I enjoyed with the standard opams with Dolby enabled was how fun they sounded. I really need to change them back to see if this was the case. With standard opams and no Dolby, they sounded too bright.
Right now the LME49990 are sounding very good. Only problem is that I can hear some rattling and crackling on the sound with certain tracks, maybe its just my HE-400 rev3 acting up, I've already contacted HIFiMAN about getting them replaced because some audible peak, see here
Anyone else using the LME49990 and can comment on them? How did they change the sound for you?