I’ve overlaid two additional plus 6 dB filters on this equalizer response graph, one with a Q of 2.2 and a second with a Q of 8.6, to demonstrate the change in bandwidth. However, you need to know this: High Q values result in a narrower bandwidth and lower values in broader bandwidth. It’s unlikely that we will take the time to calculate Q values.
KENWOOD CAR EQUALIZER PRO
Looking at the screenshot of the ARC Audio PS8 Pro software’s frequency response plot, we can see that boosting 500 hertz by 6 dB using a filter with a Q of 4.31 gives us -3 dB values of about 442 and 558 hertz. Frequency response of a +6 dB boost at 500 hertz using a filter with a Q of 4.31 For example, you might want to boost or cut frequency content at 500 hertz but not affect the output at 400 or 630 hertz. If you had a 30-band graphic equalizer in your vehicle, you’d want each band of adjustment to not overlap with an adjacent band (by default, at least). So if we divide the center frequency (F) by the bandwidth (B), we get the Q. Two values are important to the calculation of the filter Q: the center frequency of the filter and the bandwidth of the waveform at the point that it’s 3 dB down from the peak. Let’s look at the frequency response chart of a single band of equalization. A graphical representation of how equalizer filter Q is calculated. Yeah, I know, more gobbledygook, right? The chart below helps to make everything much clearer. So, in this context, what exactly does Q mean? In short, it’s a unitless comparison of the -3 dB bandwidth of the filter to the center frequency. We call this a parametric equalizer when frequency, cut/boost and Q are all adjustable. Your installer can dial in a certain amount of boost or cut at a specific frequency and turn the Q knob or enter a value that defines the frequency range the level adjustment affects. Many car radios and equalizers include adjustable bandwidth settings.
When talking about equalizers, the Q of a filter describes its bandwidth. For speakers, proper cone control requires carefully calculated damping. The Q factor describes the damping characteristics of a resonant system. Car audio enthusiasts will run across the term Q, Q factor or Quality factor when discussing car audio speakers, subwoofer enclosures or parametric equalizer configuration.
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