This is a question post questioning commercial productions. Now a typical stereo hits frequencys 35hz-13khz roughly. So how do they have such clarity in there lows that sound like 20hz? That's probably a poor way of asking the question,I'm really bad with words. Anyways i ask because they're sounds all seem to be prominent in every stereo that plays them, i have so many low sounds that disappear in stereos that can't handle the lows. So how do they do it. Boost the upper Frequencys in there bass? Our what?