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PAC-Audio.com
Pacific Accessory Corporation
Page 4
Rev: V1
Date: 091120
Advanced Subwoofer Amplifier Interface
for Select General Motors Vehicles
APSUB-GM61
AmpPRO PC App
Use of the AmpPRO PC App
allows you to do the following:
•
Configure User Interface Options such as:
• Minimum Volume Level
•
Enable / Disable Factory EQ
• Set Bass Center Frequencies and Q Factor
• Update Product Firmware
•
Read Firmware / Hardware Versions
• You can download the AmpPRO app at :
https://pac-audio.com/app-downloads/
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).
EQ Enabled -
This allows you to enable / disable the bass band factory EQ from adjusting the APSUB output.
Bass Freq / Q Factor -
This allows you to set the center frequency that will be adjusted when using the bass band on the
factory EQ, as well as the Q Factor for the 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. See below for
available frequencies and Q Factors. Note: This setting only affects the output of the APSUB and does not change the way that
the factory EQ adjusts the factory speakers.
60HZ
80HZ
100HZ
120HZ
0.50
1.00
1.50
2.00
Bass
Frequency
F1: 60Hz Center Frequency | 0.50 Q Factor
F2: 100Hz Center Frequency | 2.00 Q Factor
Bass
Q Factor
20 63 125 250 500 1k 2k 4k 8k 16k 20k
dB
+15
+12
+9
+6
+3
0
-3
-6
-9
-12
F1
F2