I have a pair of Audio Technica ATH-AD700X with an impedence of 38 ohms. I currently have them plugged in to my PC with a SoundblasterX G5 soundcard. Lowgain on the soundcard is rated 32-150Ohm and high gain is 150-600Ohm. Of course I generally run on low, but if I hear a song I really like I occasionally wanna turn it on high to listen to max volume. Is there *really* any long term issues I can run into by doing this? (Completely new to higher quality audio) I'd appreciate any input. Thanks.