Kick drum and clean bass with bloom but without boom. Must be clearly heard but tight and controlled, confined to their respective frequency response, which they should be in full control of (master of their domain lol). Separation between kick drum and bass should be clearly defined with a tick of silence in-between. But the sin of all sins, the bleeding of bass into low mids, is the ultimate show stopper. Bad audio systems do this, bad mixes do did, and bad sound engineers do this, as if they had a hearing impairment of some sort and can’t hear anything between 80Hz and 400Hz, the “danger zone” I like to call it. Parametric EQ’s don’t exist solely for purists who own the only 17 flawless albums ever recorded so that they can complain about EQ’s making bad recordings sound better, a mortal sin apparently. I always wondered bout this… do these purists enjoy evil EQ’d recordings or do they merely endure them? Or perhaps they stick to the 17 good ones? A’rent they aware that those 17 engineers more than liklely used EQ?. Read on another forum a fellow complain that the old country songs he enjoyed sounded “like a kazoo” if not eq’d, to which a self-appointed purist replied “better a kazoo than EQ”. I don’t know what a kazoo sounds like but I doubt I’d like it. Oh well…