Aiwa XR-M55 - Manual (Page 10)

with true stereo separation.
SOUND pg. 7
AUDIO ADJUSTMENTS
VOLUME
Turn VOLUME/MULTI JOG on the main unit, or press VOL ( /\ or \/ ) on the remote control.
The volume level is displayed as a number from 0 to MAX (31).
The volume level is automatically set to 20 when the power is turned off with the volume level set to 21 or more.
To see the present volume level press DISPLAY on the remote control twice.
SUPER T-BASS SYSTEM
The T-BASS system enhances the realism of low-frequency sound.
Press JOG MODE once, then turn MULTI JOG within 3 seconds to change the T-Bass level.
The level changes as follows. Select one of the three levels or the off position to suit your preference
T - BASS 0
↔
T - BASS 1
↔
T - BASS 2
↔
T - BASS 3