As the thread title suggests I'm currently having problems with the note "E" and occasionally D and Eflat. It seems to be far louder and much more boomy than any other note, to the extent that it completely drowns out the band and turns our sound in to mud. This happens in three places: Measurements are a complete guess: The bands practice room Medium sixe (20ft * 20 ft apporx) Another band practice room (Quite small, 15*10 approx) My practice room at home (very small) (6ft*8f/t) My righ currently consists of: Mesa Boogie 400+ - Eq settings Bass 2, Middle 9 Treble 4 Ampeg SVT 410 (Horn on -5 db) Fender Jazz with John East Preamp (Boominess happens in active and passive mode) If it was just happening in one room I'd blame the room for just being boomy but as it's happening in multiple locations I'm worried it's something to do with my set up. It may be worth noting that on a gig or in a large room it seems fine. I've tried cutting all of the bass in my sound (at 40 hz, 80, hz and 100 hz independantly and together) and even when my bass is on the whole sounding really thin the E notes stick out like a sore thumb. So I'm calling on the collective TB knowledge to help me sort this out, does anyone have any idea what the problem could be? Is it just poorly designed rooms? FWIW I have tried running my bass through a guitar cab and it seems to make all As boomy!?