I play metal, kind of a threeway between tech death + metalcore + deathcore (think all of the OG sumerian bands' first albums + fallujah, rivers of nihil & inferi). soundwise I know most of that points to 5150s, but they're too messy to me; I can never get a sound out of them that I like that also FEELS good to play. on the other hand, the mark IV (with the graphic eq, of course) feels a million times better; everything is super clear, the palm mutes are perfect. but I really want to try and find a way to add some nasty lower growliness to it, to me that'd be the most perfect sound. so what should I do? trying different tonestacks, adding the USA tonestack to a different amp, messing with the power or preamps, trying a different amp altogther, I'm open to anything