2000 Nissan Xterra Owner's Manual - Page 120

Adjusting tone quality and speaker balance To adjust the audio levels for bass, treble, fader, and balance, push the AUDIO button and adjust the level with the TUNE/FF-REW or buttons. Press the audio button once for BAS (bass), twice for TRE (treble), three times for FAD (fader) and four times for BAL (balance). Once the audio level is set the display will return back to radio, cassette or CD display mode after 7 seconds or the AUDIO button can be pressed again within 7 seconds to set the next audio level. Pressing the AUDIO button a fifth time will return the display back to radio, cassette or CD display mode. Fader adjusts the sound level between the front and rear speakers, balance adjusts the sound level between the right and left speakers. AHA1128 Heater, air conditioner and audio systems 4-31