I only use my headphones with one amp/dac setup, I don't use them with anything else. I was asking people about tube amps, since I was still skeptical on those. I have no idea what these headphones would sound like on anything outside my own setup, but I don't think the amp/dac plays a huge role in sound differences. Crinacle stated that after trying various dac/amp combinations, he didn't hear a difference for the 8xx or at least no improvements, so I don't feel that's a good starting point and trusted his comment on that.