Just got my Lyr...ran some quick comparisons between my modded EF-5 (OP627x2 + RCA Clear Top) and the Lyr (GE tubes) with my HE-500.
Some key findings:
- Lyr has slightly larger soundstage
- Lyr has more "attack"
- Mids are slightly smoother in the EF-5 however still amazing on the Lyr
- EF-5 sounds more intimate where as the Lyr sounds more further away
- Both fantastic amps with their own strengths...however SLIGHT advantage towards the Lyr. Love them both but will be letting go of my EF-5.
The Lyr will likely sound better if you roll in some better tubes. Those stock GEs are OK, but there are much better tubes out there.