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Audio Adjustment <Equalizer>
About the equalizer menu
One important factor for creating quality sound is the correction of disturbances in fre-
quency characteristics within the complex shape of a vehicle interior.
Reflected sounds have a strong effect on direct sound in a vehicle because of the vehicle’s
shape, the confined space, absorption of sound by the seats and reflection from the win-
dows. All these cause disturbances in the frequency characteristics. Such disturbances will
be apparent as reduced sound quality.
Any one of two kinds of digital equalizer is used under this system, depending upon the
configuration of the audio system. The digital equalizer adjustment corrects disturbances
in frequency characteristics and creates a smooth sound quality.
• As installation conditions differ for the left and right speakers, different corrections must
be made for each. All two digital equalizers are able to correct the left and right speakers
separately.
31 band graphic equalizer (31B-GEQ)
You can perform 31-band (1/3 octave intervals) level adjustments for left and right chan-
nels independently or combined to achieve the optimum acoustic characteristics for the
environment in your vehicle.
3 band parametric equalizer (3B-PEQ)
You can perform 3-band level adjustments for left and right channels independently or
combined, adjusting the levels of a choice of 31 frequencies (1/3 octave intervals) as
desired. You can also adjust the inclination of the equalizer curve (Q factor) of each of the
bands.
