PAC AP4-TY13 Quick Start Manual Download Page 5

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PAC-audio.com

Pacific Accessory Corporation

Page 5

Rev: V3

Date:062419

Advanced Amplifier Interface 

for Select Toyota Applications

AP4-TY13

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 radio beeps that are heard through the AP4.

Chimes Enabled - 

This allows you to enable / disable AP4 radio beeps (ie: tone that is heard when pressing radio buttons). 

This is used when mixing factory and aftermarket speakers. It is also possible to turn the beeps off altogether using the radio's 

factory settings menu.

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 firmware as it becomes available. Please visit 

www.pac-audio.com or contact our tech support department to see if there is a firmware 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 file and select it. This will begin the updating process. Once finished, disconnect the interface 

from the PC and resume normal operation.

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