2004 Chevrolet Corvette Owner's Manual - Page 184

Radio with Cassette Playing the Radio PWR (Power): Press this knob to turn the system on and off. VOL (Volume): Turn this knob to increase or to decrease volume. RECALL: Press this button to switch the display between the radio station frequency and the time. Time display is available with the ignition turned off. SCV (Speed-Compensated Volume): With SCV, your audio system adjusts automatically to make up for road and wind noise as you drive. Set the volume at the desired level. Turn the control ring behind the power knob clockwise to increase the SCV. Each notch on the control ring allows for more volume compensation at faster vehicle speeds. Then, as you drive, SCV automatically increases the volume, as necessary, to overcome noise at any speed. The volume level should always sound the same to you as you drive. If you do not want to use SCV, turn the control all the way down. Your vehicle is equipped with six Bose® amplified speakers. See your dealer for details. 3-70