Turning On/Off The Loudness Function - JVC KS-FX90 Instructions Manual

Turning on/off the loudness function

The human ear is less sensitive to low and high frequencies at low volumes.
The loudness function can boost these frequencies to produce well-balanced sound at low
volume level.
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Turn on or off the loudness function.
Each time you press LOUD, the loudness function turns on and off
alternately.
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