Yamaha R-S300BL ユーザーズマニュアル

A TUNING jj / ii 
Selects the tuning frequency when TUNER is selected as 
the input source (see page 18).

B Remote control sensor
Receives infrared signals from the remote control.

C PURE DIRECT and indicator
Allows you to listen to a source in the purest possible 
sound (see page 15). The indicator above it lights up and 
the front panel display turns off when this function is 
turned on.

D PHONES jack
Outputs audio to your headphones for private listening.

Press SPEAKER A/B so that the SP A/B indicators turn off 
before you connect your headphones to the PHONES jack.

E BASS control
Increases or decreases the low frequency response. The 
center position produces a flat response (see page 15).

F TREBLE control
Increases or decreases the high frequency response. The 
center position produces a flat response (see page 15).

G BALANCE control
Adjusts the sound output balance of the left and right 
speakers to compensate for sound imbalances caused by 
speaker locations or listening room conditions (see page 
15).

H LOUDNESS control
Retains a full tonal range at any volume level to 
compensate for the human ears’ loss of sensitivity to high 
and low-frequency ranges at a low volume level (see page 
16).

I INPUT selector
Selects the input source you want to listen to.

J VOLUME control
Increases or decreases the sound output level.

This does not affect the output level of the REC jacks.