The AP4-FD31 provides a 6-channel pre-amp output for use with aftermarket audio equipment. Using the digital A2B audio data in conjunction with CAN data, the AP4-FD31 delivers a variable 5v RMS pre-amp output with fading, balance, equalization, and level control capabilities.

The module also retains audio from other vehicle features such as factory navigation prompts, safety chimes, Bluetooth and voice activation. A data bus controlled remote amplifier turn on wire is also provided by the AP4-FD31. The module also provides a variable 2-channel fiber optic digital audio output (TOSLINK).

**Factory amplifier must be removed from vehicle when installing this interface**

Use of the AmpPRO App allows you to do the following:

• Configure User Interface Options such as:
  
• Minimum Volume Level
  
• Chime Volume Level
  
• Enable / Disable factory EQ
  
• Bass / Mid / Treble boost frequencies and Q factor
  
• Update Product Firmware
  
• Read Firmware / Hardware Versions

Important Notes:

• This interface is only compatible in vehicles equipped with an A2B data bus controlled premium sound system. To verify compatibility, look for a B&O badge on the door speakers or dash speakers.
  
• The AP4 interface installs at the factory amplifier location. Included T-Harness installs behind radio to access factory speaker wiring not available at factory amplifier.
  
• The factory amplifier will be disconnected and will no longer power the vehicle speakers. An aftermarket amplifier must be added to power the vehicle's speakers.
• For example, you cannot only add a subwoofer, as the factory speakers that were connected to the factory amplifier will no longer function.
  
• On most Ford models, some of the vehicle speakers will be connected to the radio module in addition to the external amplifier. These speakers will also stop working when the factory amplifier is disconnected and will need to be powered by an aftermarket amplifier. See Speaker Connections on Page 3 for vehicle specific speaker information.
  
• The chime volume and minimum volume levels are set to 50% by default. If this level is adequate, no additional adjustment is required. 
  
• The level control knob must be connected in order to manually adjust the chime volume and minimum volume settings.
  
• The remote output is rated at 2A of current. If more current is needed, an external relay must be used.
  
• Channels 5 and 6 are non-fading outputs. The output level of channels 5 and 6 can be controlled using the supplied level control knob.
  
• No adjustments can be made manually using the programming button, or the factory SWC, when the module is connected to a PC.

Shipping Policy

DBs Car Audio is proud to offer fast & free shipping on all items listed in our store!!

Shipping Methods and Transit Times

DBs Car Audio ships orders from our Kissimmee, Florida location. On occasion, orders will be fulfilled directly by the manufacturer or distributor in order to reduce the shipping time..

Order Tracking

Once an order has been shipped, we send our customers an email with the tracking number for the order. Click on the tracking link in the email to follow the location of the package on the carrier's website. If you did not receive a tracking number by email or need to confirm the tracking information, please contact call us at 1-800-927-9390

Signature Required

Due to the valuable contents of some shipments, DBs Car Audio will only require a signature upon delivery if the order is over $500. Such guidelines will not be overruled upon the customer's request. Please understand that this is a security measure taken by our Company to ensure the safe delivery of each package and guarantee excellent service. Many of our third-party shipping carriers and payment companies require signatures upon delivery to protect against fraud and theft. Customers may request a signature upon delivery by emailing us at dbscaraudiofl@gmail.com.

Shipping Policy Disclaimer

Delivery estimates do not apply to items shipped directly from the manufacturer, nor out-of-stock items. Some items that ship from the manufacturer can only be delivered to addresses within the 48 continental states.

Standard delivery time for domestic customers will average from 2-4 business days, but can take longer in some cases. Saturday, Sunday and national holidays are not considered business days for delivery purposes.

Our Shipping Guarantee applies only to shipments delayed due to our service failure. We will not guarantee shipments that are delayed due to an act of god (ex: weather), a catastrophic event, or failure by our delivery partners. Our guarantee is also voided if incorrect billing or shipping information is given and results in your order being delayed to its destination. Our guarantee is also void if no one is available to sign for shipment when delivery attempt is made if a signature is required.