does anyone know this problem: playing the track loud it sounds great - just the way you want it. But at a low level it sounds very weak - especially the vocals.
Our ears' frequency response is not linear at all volumes. At lower listening volumes, bass and high frequencies need to be louder to be perceived at the same level as mid-range frequencies. At higer volumes, our ears hear the low and high end better... which can mean what sounded perfect at low volumes can sound too bassy at higher volumes.
I like to check my mixes at a wide range of levels. That's really the only way I've found to deal with it. If you can get things sounding pretty energetic at a low volume, it'll probably kick at higher volumes.