hey guys. my stock 6l6s in my tweaker crapped out so i bought some el34s, stuck them in and it does not sound great. very muddy when you crank it. and somehow my guitar actually sounds out of tune. what are some recommendations for tubes for this amp? my preference is for cleaner tones since i can always boost it with a pedal. at this point i'm leaning back to 6l6s. was wondering what other tubes or tube brands you guys use to get good tones in the tweaker.