I have the GE 6BZ7 in my Lyr. I had someone recommend Amperex Bugle Boy 12AX7s to me, but they were beaucoup dinky dao $$$. I only got my Lyr a week ago and I don't want to start dropping bone$ for tubes just yet.
At thetubestore.com I spotted the Tung-Sol 12AX7 at $15 each and the Preferred Series 7025-S (a variation of the 12AX7? commissioned by thetubestore.com) for $24 each... and the store rated them as being pretty good. So, I had a couple of questions.
http://thetubestore.com/tungsol12ax7.html
http://thetubestore.com/preferred7025.html
First, how can I tell if these tubes will work for a headphone amp? The site says that they will work in preamps... which the Lyr can act as. I've seen the tube discussed in guitar preamp scenarios but not headphone amps.
Second, has anyone heard these tubes on the Lyr or other amp? I like warmth, distinct mids and vocals. Any boost to 3D sound would be great too.
Thanks
Edit: Went to the Shiit site and they said to feel free to substitute any of the follow tube types: 6DJ8, 6922, ECC88, 6BZ7, CV2492, CV2493, or 6N1P. Does this mean "no" to anything but?