What model tube are you looking for
Hmm, thanks for the suggestions guys. As for the model I am looking for, I am not sure yet exactly because I am new to this so just any tubes you guys use that are worth mentioning. I want the best for the money and is easy to find on like tube monger or ebay or even on these forums. I have been looking at the La Radiotechnique E188CC RTC's but they seem to be quite rare and the Amperex Orange Globes but I hear those are quite boring for the HE500s so I will have to get more help :/
Highroller - wht not call Schiit and see if they have a suggestion to match better to your liking with the cans you have.
Also I found this post on headfi if you haven't seen it
"Favorite tubes for my Lyr / PS Audio D-Link3 with following headphones:
HE-500 - Amperex Bugle Boys, D-getter, '58-'59
Mullard CV-2492/3, '60s
Also, again if you haven't seen it here is the headfi search on all Lyr threads there http://www.head-fi.org/newsearch?search=schiit+lyr