Installation Guide

Pacific Accessory Corporation

Page 4

Rev. 070617

Advanced Amplier Interface

for Ford

AP4-FD21

AmpPRO App (cont.)

PLEASE NOTE: These settings can be adjusted with the module installed in the vehicle, or on the bench. However, it is

recommended to make the adjustments with the module installed, and the factory radio on, so that the changes can be

heard.

Minimum Volume Level - This allows you to set the minimum volume level of the factory radio (factory radio volume level 1).

Chime Volume Level - This allows you to set the volume of the AP4 chimes (ie: park sensors).

Chimes Enabled - This allows you to enable / disable AP4 chimes (ie: park sensors). This is used when mixing factory and

aftermarket speakers.

3 Band EQ Enabled - This allows you to enable / disable the 3 band factory EQ.

Bass / Mid / Treble Freq / Q Factor - This allows you to set the center frequency that will be adjusted when setting the 3 band

factory EQ, as well as the Q Factor for each frequency. The Q Factor determines how many of the adjacent frequencies will be

affected when adjusting the selected frequency. The lower the Q Factor, the more frequencies will be affected.

60HZ 500HZ 7.5KHZ

80HZ 1KHZ 10KHZ

100HZ 1.5KHZ 12.5KHZ

120HZ 2.5KHZ 15KHZ

0.50 0.75

1.00 1.00

1.50 1.25

2.00 1.50

Bass Frequency Mid Frequency Treble Frequency

Available Frequencies and Q Factors

Bass Q Factor Mid Q Factor Treble Q Factor

0.75

1.25

Firmware Updates

The AmpPRO app will also allow you to update the interface with new rmware as it becomes available. Please visit

www.pac-audio.com or contact our tech support department to see if there is a rmware update for your interface.

Connect the interface to your PC and select "Firmware", then “Update Firmware”. Now select “Select File”. Finally, browse to the

place where you saved the le and select it. This will begin the updating process. Once nished, disconnect the interface from

the PC and resume normal operation.