Section

07Initial Settings

Switching the auxiliary setting

It is possible to use auxiliary equipment with this unit. Activate the auxiliary setting when using auxiliary equipment connected to this unit.

1 Press FUNCTION to select AUX.

Press FUNCTION repeatedly until AUX appears in the display.

2 Select AUX on or off with 5/∞.

Pressing 5/∞ will switch AUX between on and off and that status will be displayed (e.g., AUX :ON).

Switching the dimmer setting

To prevent the display from being too bright at night, the display is automatically dimmed when the car’s headlights are turned on. You can switch dimmer on or off.

1 Press FUNCTION to select DIM.

Press FUNCTION repeatedly until Dimmer appears in the display.

2 Select DIM on or off with 5/∞.

Pressing 5/∞ will switch Dimmer between on and off and that status will be displayed (e.g.,

Dimmer :ON).

Selecting the brightness

You can select the display brightness. Initially this mode is set to 12.

1Press FUNCTION to select BRIGHT. Press FUNCTION repeatedly until Brightness appears in the display.

2Select the desired brightness with 2/3.

• The display shows 0 – 15.

Setting the rear output and sub- woofer controller

This product’s rear output (rear speaker leads output) can be used for full-range speaker (Rear SP:FULL) or subwoofer (Rear SP:S.W) connec- tion. If you switch rear output setting to the Rear SP:S.W, you can connect a rear speaker lead directly to a subwoofer without using an auxil- iary amp.

Initially, the unit is set for rear full-range speaker connection (Rear SP:FULL).

When rear output are connected to full range speakers (when Rear SP:FULL is selected), you can connect the RCA subwoofer output to a subwoofer. In this case, you can select whether to use the subwoofer controller’s (low pass filter, phase) built-inS.W Control:INT or the auxiliary S.W Control:EXT.

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Pioneer DEH-P640 operation manual Switching the auxiliary setting, Switching the dimmer setting, Selecting the brightness
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DEH-P640 specifications

The Pioneer DEH-P640 is a versatile and feature-rich car stereo that delivers a superior audio experience for those who appreciate high-quality sound on the road. Renowned for its exceptional sound quality and user-friendly design, the DEH-P640 integrates various technologies and characteristics that enhance both functionality and convenience.

One of the standout features of the DEH-P640 is its Direct Sound Control function. This allows users to fine-tune their audio settings to achieve a personalized sound profile. The unit is equipped with a 4-band equalizer, enabling precise adjustments of frequencies to suit individual preferences and the acoustics of the vehicle. Additionally, the DEH-P640’s built-in MOSFET amplifier provides robust power output, ensuring that music sounds rich and detailed, enhancing the listening experience.

Another notable aspect of the DEH-P640 is its compatibility with a wide array of audio formats. It supports both CD and MP3 playback, giving users the option to enjoy their favorite tracks from traditional CDs or digital music libraries. The front panel features a convenient auxiliary input, allowing for direct connection of portable devices, such as smartphones and MP3 players. Furthermore, the unit is equipped with a USB port, enabling access to USB flash drives containing music files.

The DEH-P640 also incorporates advanced technologies for improved user interaction. Its bright, easy-to-read display keeps users informed about the current track and settings. Additionally, the stereo features customizable colors for the display and buttons, allowing users to match the unit with their vehicle's interior aesthetic. The simple interface ensures that adjustments can be made with minimal distractions, promoting safer driving.

For those who appreciate the processing power of digital audio, the DEH-P640 includes features such as Sound Retriever and Advanced Sound Retriever, which enhance compressed audio files by restoring lost frequencies, resulting in a more vibrant and engaging listening experience.

The DEH-P640 is designed not just for music lovers, but also for those seeking a comprehensive multimedia experience. With its range of features, high-quality sound output, and user-friendly interface, this car stereo has cemented its place as a popular choice among consumers looking to enhance their in-car audio experience. Overall, the Pioneer DEH-P640 is an excellent investment for anyone looking to elevate their daily commutes or road trips with exceptional sound quality and technological sophistication.
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