The subwoofer's job is to produce the very low tones of your audio system's dynamic range. A true subwoofer will be able to reproduce a 20 Hz test tone, which will be rather felt than heard, but 30 Hz will do very well in most listening environments and for most music. Most subwoofers today contain a built-in amplifier and a crossover network that allows you to adjust the sub's upper frequency response so as to more effectively blend in with your main speakers.
Subwoofer performance is greatly affected by placement. So where you place the subwoofer and where you sit are critical to getting the most from it.Read More