So finally I connected Lyr with stock tubes to WA7 acting as DAC driving HD700 with Silver Dragon cable and after warming up for 40 minutes I started listening to tracks I use for testing and after less than 10 minutes I already knew that they are not for me so I switched to National Electronics (Matsu****a) 6922 which sound more to my liking but not better than WA7 with EH tubes because high sound shrill on some recordings while it's not the case when I use WA7 alone or with Bifrost. So at this moment Bifrost/WA7 combo is my favorite but I have to try Lyr with Biffrost and NFB 11.32 (as DAC only) plus 2 more tube sets but it's already clear that Lyr, unlike WA7, can't be easily used with many headphones since you will need to spend a lot of time and money to find tubes which will be best match every time you want to change headphones.
Update: I'm using Bifrost now with Lyr and National 6922 tubes and it pairs a little bit better than with WA7's DAC but bass isn't as panchy and deep but a little bit boomy while highs are not shrill anymore but little bit less detailed.
Update 2: Just tried NFB 11.32 instead of Bifrost but heard no difference
Edited by olegausany - 9/8/13 at 6:44pm