JVC KW-Z1000W Instruction Manual America - Page 80
High-Pass Filter, High-Shelving Filter/Low-Shelving Filter, Peaking Filter
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Controlling Audio ●●High-Pass Filter Passes signals with frequencies higher than a certain frequency (fc: cutoff frequency) and attenuates signals with frequencies lower than the cutoff frequency. Use this to pass only high-frequency signals. Use this in the following cases for example: --For extracting the frequency band for separate tweeters. By extracting the specific frequency band, level adjustment can be made to the frequency band individually. --The sound may be muddy when you play back low frequency sound. This occurs when frequencies below the speaker capacity is inputted. To cancel this, use the high-pass filter to cut off the frequencies below the speaker capacity. [dB] fc [Hz] ●●High-Shelving Filter/Low-Shelving Filter These filters reduce or increase signals above or below a certain frequency (fc: cutoff frequency), which create shelves in the frequency spectrums. A high-shelving filter reduces or increases the frequencies above the target frequency and a lowshelving filter reduces or increases the frequencies below the target frequency. The low shelf controls the lower frequencies and the high shelf controls the high frequencies. Use these in the following cases for example: --When you want to change the volume of the tweeters, for example when they are close to your ears and are sounding too loud. --When you want to change the subwoofer volume at hand. [dB] ●●Peaking Filter The frequencies in the vicinity of a certain frequency (f0: center frequency) are boosted or attenuated. Use this in the following cases for example: --When you want to control a narrow range of frequencies to correct the frequency abnormality in the car. --To diminish a chattering noise from the speaker by attenuating the frequency range of the noise. --To adjust of the sound balance of the whole range between the low end and the high end. [dB] f0 [Hz] ●●Low-Pass Filter Passes signals with frequencies lower than a certain frequency (fc: cutoff frequency) and attenuates signals with frequencies higher than the cutoff frequency. Use this to pass only low-frequency signals. Use this in the following cases for example: --For extracting the low frequencies band for a subwoofer. --For extracting middle/low frequencies when you are using speakers with separate tweeters and you want to output the high frequencies to the tweeters and output the middle/low frequencies to the woofers. --To cut the high frequencies when they are too loud. [dB] fc [Hz] fc [Hz] 80