This may be useful for some - here's a Sound on Sound page with a link to a frequency chart in the top right corner. Fundamental notes are within the range of 16Hz to 9kHz, with harmonics going much further up in frequency. If you don't listen to a lot of pipe organ music then a lower bound of 30Hz will include all the fundamentals e.g. if you mostly listen to rock music low B on a 5/6 string bass is 30Hz and you'll hear everything a 22" bass drum has to offer from around 55Hz up.
Providing you have a loudspeaker that will play low enough the room will dominate the frequency response below the low 100s of Hertz. As loudspeaker placement is key to getting the best low frequency response it can be beneficial to allow one or more sub woofers to take on this duty. In a large, acoustically controlled space this is not so much of a problem and it matters less if the low frequencies are coming from the same cabinet as the bass, mid and high.
The high frequency response is bounded by our ability to hear and 20kHz is well outside of this range assuming most of us are beyond our teenage years. There may well be recorded content above this arbitrary limit but I won't be able to hear it and so I don't miss it if it's not reproduced.
So for me 30Hz-20kHz is fine and I'm not sure I'd notice too much if it was a smaller range than that. I build equipment (not loudspeakers) to exceed 20Hz to 20kHz because that is the defacto standard.
Providing you have a loudspeaker that will play low enough the room will dominate the frequency response below the low 100s of Hertz. As loudspeaker placement is key to getting the best low frequency response it can be beneficial to allow one or more sub woofers to take on this duty. In a large, acoustically controlled space this is not so much of a problem and it matters less if the low frequencies are coming from the same cabinet as the bass, mid and high.
The high frequency response is bounded by our ability to hear and 20kHz is well outside of this range assuming most of us are beyond our teenage years. There may well be recorded content above this arbitrary limit but I won't be able to hear it and so I don't miss it if it's not reproduced.
So for me 30Hz-20kHz is fine and I'm not sure I'd notice too much if it was a smaller range than that. I build equipment (not loudspeakers) to exceed 20Hz to 20kHz because that is the defacto standard.