New to this hobby and have a question:
while Lyr is working in the pure class A mode, does it sound identical to Asgard, or does it have some different signature?
Depends on the tube.
Lot of variables to account for. Assuming same cans, low impedance (best with the Asgard) - you still need to factor in tubes. I have both - plus a newly built 'A/B' switch. I'll set it up soon to A/B the two amps with identical source and headphones (Denon D2000). Gotta figure out a cost effective way to level the volumes. It'll not be scientific, but should give a good feel for the differences (oops, showed my bias). I do suspect the Lyr to be more dynamic (power reserves), faster and possibly have a warmer tone (tubes).
I was under the impression that it is 32 ohms but I'm not sure why.
It could have something to do with the OP though:
"How about a hybrid headphone amp that'll do 6 watts RMS into 32 ohms?"
In a word, no. The Lyr is a more musical amp than the Asgard.
When you say the Lyr is more "musical" do you mean it has greater dynamics because of the additional power OR that it imparts it own sonic signature on the music, emphasizing some frequencies over others?
Thats a bummer, its too bad you missed the big Toronto meet earlier this month. But you could talk to some of the folks that go to your local meets and see if you can have a mini meet. It looks like you guys attract a lot of headfiers and have pretty big meets. Seattle had one on March 5th the day before yours and you guys had a bigger list.
I'd second that. The Head-Fi meets are a great way to listen to meet some of the gang here and hear some amazing setups. I've been to three (two at L.A. International Airport and the recent one in Burlingame in the SF Bay Area) and all have been very hepful in selecting equipment. I picked up the HE-6 headphones and the Lyr after the Burlingame meet - and the Smyth Realiser 8 after the last LA meet.