Op-amp preamp discussion

[Dannyx]

True, that would be a pretty interesting test and since I have 3 boards, I could do that rather easily. That's why I also said we're talking from a purely subjective standpoint, relying on the human ear and each individual test subject, as I'm sure there would be some differences from a purely technical standpoint in a laboratory setting with high-end test equipment and number-crunching, maybe even batches of the same exact components (op-amp, cap, potentiometer).