Yes 2x OPA2227 in buffer
and one DIP8 socket with 2xOPA627. an yeah, when I switch to 6,5x gain there are some instability issues indeed (i'm going to switch them today
) - thanks for advice!
I'm using 2,5x low gain at all time. I have to say, I own my o2 for over a year and I can't really recally any background noise issues with any headphones I ever plugged into this unit. It's been always black background, kind of reference to me.
![Headphone Smile :) :)](https://cdn.head-fi.org/e/headfi/smily_headphones1.gif)
I'm using 2,5x low gain at all time. I have to say, I own my o2 for over a year and I can't really recally any background noise issues with any headphones I ever plugged into this unit. It's been always black background, kind of reference to me.
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