JWahl
1000+ Head-Fier
This is the quote from his review that I am referring to:
"The output DC-voltage is already pre-adjusted by Burson to a minimal value. After a couple of minutes of warm-up, I was able to measure values between +/-1 mV and +/-5 mV of DC, so a respectable low value indeed. However, in case you intend to swap the default opamps inside, don’t forget to measure the DC on both jack and XLR plugs before connecting headphones and adjust the blue variable resistors ONLY if the DC is higher than +/-25 mV per channel (or wait more time to warm-up or swap back the opamps with the originals from Burson)."
"The output DC-voltage is already pre-adjusted by Burson to a minimal value. After a couple of minutes of warm-up, I was able to measure values between +/-1 mV and +/-5 mV of DC, so a respectable low value indeed. However, in case you intend to swap the default opamps inside, don’t forget to measure the DC on both jack and XLR plugs before connecting headphones and adjust the blue variable resistors ONLY if the DC is higher than +/-25 mV per channel (or wait more time to warm-up or swap back the opamps with the originals from Burson)."