Sony PHC-Z10 Primary Operating Instructions Manual page 22

Selecting the audio emphasis (SOUND/MEGA BASS) (continued)
Reinforcing the bass sound
Press MEGA BASS.
"MEGA BASS" appears in the display. To return to
normal sound, press the button again.
Getting the surround effect
Press SURROUND.
"SUR" appears in the display.
You can get the surround effect without connecting
surround speakers. To return to normal sound, press
the button again.
22
The Audio Emphasis