First off, I'm really enjoying my Xonar STX sound card. I've been using it with the Headphone Out with various headphones, enjoying myself. However, I have a technical question. I know the line out or speaker outs have a better SNR rating. I've recently purchased a Pa2v2 amp, and I'm wondering if it would get better audio running off the line out with my Pa2v2 amp as opposed to the Headphone Amp built in? I'm listening to some tracks and experementing now, but I just want a technical answser. Any insight would be great! Thanks! PS. I guess what it boils down to is this: Do I benefit by bypassing in the headphone amp, for the increased SNR of the line out using a Pa2v2 as the Amplifier for my headphones?