I've been playing with my Peavey Firebass's mid shift control for a while but I still haven't decided which setting I like best. It has three main settings: 200hz, 1khz and 2khz. I think someone once said Toto's Mike Porcaro liked to boost a certain mid frequency which was a sure-fire way to get a bass sound that sounds good pretty much anywhere and in any kind of music, but I don't really remember which one it was. I think it was 1khz but I'm not sure. During rehearsal, I always have very little time to no time to fiddle around with my amp settings, so I'm not sure if I found the best setting. We once did a couple recordings using only two overhead mikes and the bass sounded really good (using our huge PA speakers, that is), so I must be doing something right, I guess. Too bad I have no clue which mid frequency I was boosting at that time. So, exactly what is the difference in sound between 200hz, 1khz and 2khz and which frequency should I be favouring? Most of my bands' songs have pretty low distorted guitars and busy synths, which isn't really a problem at the moment as I have the strongest amp out of all of us, but our guitarist will be upgrading to one of those hellish Marshall stacks soon which means I'll have to brush up my knowledge on mid frequencies in order not to get lost in the mix. The other day, I was rehearsing with only piano and drums and was told I sounded a bit muddy. I didn't really know what to do except turn down down the bass control on my amp a bit, but I eventually discovered that plucking over the neck pickup and leaving the bridge pickup alone fixed the problem. I guess in this case, too, there were mids involved as playing over the bridge pickup usually makes you sound middier. Anyone got some advice on mids?