How to operate the Sound Adjustment Mode67XIIAbout parametric EQA variety of materials are used inside a vehicle to manufacture the seats and windows, and becausethese materials absorb and reflect sound in different ways, the parametric equalizer lets you adjustthe peaks and dips of the frequency characteristics inside the vehicle to compensate for this.An “equalizer” is a function that corrects these peaks and dips in order to flatten the frequencycharacteristics. However with a normal graphic equalizer, the median frequency and the Q(sharpness and band width) are fixed, so that when neighboring bands are corrected, there is a limitto the amount by which distortion in the peak and dip characteristics can be corrected. A “parametricequalizer” lets you adjust the median frequency, Q (sharpness and band width) and gain to variablelevels, so that you can make fine adjustments to spot areas of the frequency band.[Parametric equalizer characteristics]1.Median frequency can be varied.2.Gain can be varied.3.Q (sharpness/band width) can be varied.About position selectorFrom the preset speaker level and Balance/Fader value, the position selector easily provides thelistener optimum phase by selecting the seat position.High PeakDipHigh[Frequency]LowLow[Sound pressure]High[Sound pressure]LowLow High[Frequency]High[Sound pressure]LowLow [Frequency] HighHighLowLow High[Sound pressure][Frequency]