I did a forum search but did not find anything on this, anyone tried one of these yet? Seems like a great idea, it automatically bias's your amp and you can set custom bias to run two 6l6 and two El34 if you want.
Also great for Mesa Products that run low bias or if you have miss matched tubes it will bias them all the same. Also tells you if a tube goes bad and cuts the amp down to 50 watts so you do not blow anything. Also gives you the option to run the amp at 50 watts, so many options and not bad for $449 and I can bet you can get it cheaper if you use a coupon. I think I will be picking one of these up soon.
Nifty concept, but I still prefer good old bias points and a pot. But it would be good for people who aren't overly familiar with proper bossing procedure or who want to experiment with different tube sets.