Yamaha RX-397 User Guide

■ Adjusting the BALANCE control

Adjusts the sound output balance of the left and right 
speakers to compensate for sound imbalance caused by 
speaker locations or listening room conditions.

■ Using the PURE DIRECT button

Routes input signals from your audio sources so that the 
input signals bypass the BASS, TREBLE, BALANCE and 
LOUDNESS controls, thus eliminating any alterations to 
the audio signals and creating the purest possible sound.

■ Adjusting the BASS and TREBLE 

Adjust the high and low frequency response.

BASS
Increases or decreases the low frequency response.

TREBLE
Increases or decreases the high frequency response.

■ Adjusting the LOUDNESS control

Retains a full tonal range at any volume level, thus 
compensating for the human ears’ loss of sensitivity to 
high and low-frequency ranges at a low volume level.

If the PURE DIRECT button is turned on with the LOUDNESS 
control set at a certain level, the input signals bypass the 
LOUDNESS control, resulting in a sudden increase in the sound 
output level. To prevent your ears or the speakers from being 
undesirably damaged, be sure to press the PURE DIRECT button 
AFTER lowering the sound output level or AFTER checking that 
the LOUDNESS control is properly set.

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