Define "correctly". Frequency correct or audible correct? While 17hz is the floor for audible frequencies, even if you can hear it, you won't be able to perceive that much detail. In fact, I'd argue that a $2500 system with a subwoofer will sound the same as a $250 subwoofer, assuming the same sensitivity. Thing is, human ears are crap (imagine low-res gif pictures and thinking of it as 8k frames), and very very bad below 100Hz. What better/more expensive systems have (besides better quality components) is often better sensitivity, so a passing its not audible on your $100 system becames audible - not because frequency - but because sensititity (the cone is actually able to reproduce the faint sound)