Sony CDX-GT40U Operating Instructions (CDX-GT40U) - Page 16

LPF FREQ*2 (Low Pass Filter Frequency) Selects the subwoofer cut-off frequency: "50Hz," "60Hz," "80Hz," "100Hz," "120Hz." LPF SLOP*2 (Low Pass Filter Slope) Selects the LPF slope: "1," "2," "3." SW PHASE*3 (Subwoofer Phase) Selects the subwoofer phase: "NORM," "REV." HPF FREQ (High Pass Filter Frequency) Selects the front/rear speaker cut-off frequency: "OFF," "50Hz," "60Hz," "80Hz," "100Hz," "120Hz." HPF SLOP (High Pass Filter Slope) Selects the HPF slope (effective only when HPF FREQ is set to other than "OFF"): "1," "2," "3." LOUDNESS (Dynamic Loudness) Reinforces bass and treble for clear sound at low volume levels: "ON," "OFF." ALO (Automatic Level Optimizer) Adjust the playback volume level of all playback sources to the optimum level: "ON," "OFF." BTM (page 7) *1 When the unit is turned off. *2 When the audio output is set to "SUB-OUT" or Rear Bass Enhancer is set to other than "OFF." *3 When the audio output is set to "SUB-OUT." 16 Using optional equipment Auxiliary audio equipment By connecting an optional portable audio device to the AUX input jack (stereo mini jack) on the unit and then simply selecting the source, you can listen on your car speakers. Connecting the portable audio device 1 Turn off the portable audio device. 2 Turn down the volume on the unit. 3 Connect the portable audio device to the unit with a connecting cord (not supplied)*. * Be sure to use a straight type plug. Adjusting the volume level Be sure to adjust the volume for each connected audio device before playback. 1 Turn down the volume on the unit. 2 Press repeatedly until "AUX" appears. 3 Start playback of the portable audio device at a moderate volume. 4 Set your usual listening volume on the unit. 5 Adjust the input level (page 13).