I had a b;own power tube also after about a month. Luckily, Sweetwater support was awesome with customer service. They replaced my amp with a new one and shipped it to me free of charge on Fed Ex 2-day shipping. Played one show with the new amp and that awesome tone was back! I'm hoping this was a weird one-off thing. I absolutely love this rig. Sweetwater has made me a loyal customer so far.
Yea, sweetwater is always on point. Did your amp drop in volume as the auto bias isolated that tube pair or did it get ugly?


not only does it sound great into a big sealed cab but it also sounds great into a small 112 for example. I've found (into a sealed 412 or 810 at least) that it just really opens up the more you give it, the harder you push the master vol and then crank the channel vol's.



