Although a common for seasoned sound engineers and musicians, for newbies, the term "frequency response" might be totally new. It simply indicates the dynamic range of sound frequencies a certain speaker is able to respond, operate on or produce. So if you see a speaker with a frequency response of 100 hertz to 17 khz, it indicates you that it can effectively accommodate and function with sound frequencies within that range.
So how important is knowing the proper frequency response to an engineer or musician? Although often disregarded, frequency response is of great importance not only for achieving good sound but also for the protection of your equipment. By knowing the frequency response of a speaker, you can know at what particular range you are most likely to make adjustments with when using an equalizer. A common mistake by those unfamiliar with frequency response is by adjusting frequencies beyond the speaker's range. This not only produces bad sound but can damage a speaker significantly. For example, by adding gain to 60 hertz using a speaker with only up 90 hertz frequency response on the lower range, not only do you produce colored sound or noise, but exposes the speaker to dangerous frequencies it can't handle which may damage it.
To cut this, short, before mixing, setting up a cross-over or using your system, know the frequency response of your speakers and equipment to get the best sound results and protect the equipment as well. Most speakers have this detail at the back so you can know it at a glance.
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