CONTROLS AND FUNCTIONS3 EnA PHONES jackFor connecting headphones.yPress SPEAKERS A/B so that the SP A/B indicators (seepage 4) turn off before you connect your headphones to thePHONES jack.B SPEAKERS A/BTurns on or off the speaker set connected to theSPEAKERS A and/or SPEAKERS B terminals on therear panel each time the corresponding button ispressed (see page 12 ).C BASS –/+Increases or decreases the low frequency response.Control range: –10 dB to +10 dBD TREBLE –/+Increases or decreases the high frequency response.Control range: –10 dB to +10 dBE INPUT l / hSelects the input source you want to listen to.F VOLUME controlIncreases or decreases the sound output level.