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Frequency range and frequency response. The frequency response specification of a speaker describes the range of frequencies or musical tones a speaker can reproduce, measured in hertz (Hz). The typical frequency range for a subwoofer is between 20–200 Hz.
Frequency response (FR) This measurement tells you over what frequency range output level for an audio component will remain reasonably constant (either within a specified decibel range, or no more than a certain number of dB from the amplitude at 1kHz).
The NS-10 does not have a perfectly flat frequency response. The sound of the NS-10 is heavily boosted in the upper midrange, and like other sealed-box speakers of similar size its bass extension is limited. [5] It has a +5 dB boost in the midrange at around 2 kHz, and the bottom end starts rolling off at 200 Hz.
Electrical characteristics of dynamic loudspeakers. The chief electrical characteristic of a dynamic loudspeaker 's driver is its electrical impedance as a function of frequency. It can be visualized by plotting it as a graph, called the impedance curve.
Frequency response measurement. Frequency response measurements are only meaningful if shown as a graph, or specified in terms of ±3 dB limits (or other limits). A weakness of most quoted figures is a failure to state the maximum SPL available, especially at low frequencies.
Step responses of various high-pass filter functions, each with a −3 dB cut-off frequency equal to 50 Hz. The step response of a standard B4 vented-box low-frequency alignment is depicted in (a), while that of a standard B2 (Q = 0.7071) closed-box low-frequency alignment is depicted in (b).