I've had a Woo Audio 6 for about 8-9 months and have spent a lot (I mean a lot!) on tubes to find a flavour that suited most of my full sized cans. I'm happy with it in that respect but the newest arrivals (HE-4 and HE-500) don't quite get enough grunt from it. I still have a set of 6FD7's to try and boost a bit but I'm not hopefull that I'll be happy losing the tone of the 6SN7 Bad Boys :(
I know the EF-5 will power these phones but:
What is the SQ like in comparrison? Will I be disapointed or will the EF-5 sound as good? Should I sell the Woo and pick up a EF-5?
If anyone with experience in any of the above would care to chip in I'd be really appreciative.