PAC APSUB-GM61 User Manual

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PAC-Audio.com

Pacific Accessory Corporation

Page 1

Rev: V1

Date: 091120

Advanced Subwoofer Amplier Interface

for Select General Motors Vehicles

APSUB-GM61

Remote Turn On Output

2A Max Output

AP4-GM61-HAR

To Tuner

To Vehicle

Harness

Non-Fading

Level Control

Knob

To Aftermarket

Amplifier

Subwoofer Outputs

The APSUB-GM61 provides a 2-channel non-fading output for use with an aftermarket amplier and subwoofer. Using

the full range, xed level head unit output, in conjunction with MOST data, the APSUB-GM61 delivers a variable 5v RMS

pre-amp output with bass equalization and level control capabilities. The signal has a 350Hz / 24dB Linkwitz-Riley low

pass lter applied. A data controlled remote amplier turn on wire is also provided by the APSUB-GM61.

Introduction and Features

Important Notes

1. This interface is compatible in vehicles with or without Bose that are equipped with IO4, IO5 or IO6 model radios.

2. In some non-Bose radios, there may be absence of audio from the left channel when in AM, FM, and XM sources. The

APSUB-GM61 is capable of providing a work-around by passing the right channel audio through the left and right channels

when in the AM, FM and XM sources. All other sources will still offer left and right separation. See the troubleshooting

section on page 6 for additional details.

3. If originally equipped, the factory amplier must remain in the vehicle, and connected after the APSUB-GM61 has been installed.

4. The remote output is rated at 2A of current. If more current is needed, an external relay must be used.

5. When the bass level control knob is not connected to the APSUB-GM61, the output level will default to 100%.

6. The level control knob must be connected in order to manually adjust the minimum volume settings.

7. The minimum volume level is set to a default value. If you are happy with this level in your particular application, then

additional adjustment is not required. Please refer to the Setup and Conguration section on page 2 for more details.

8. The factory radio's speed controlled volume and surround sound mode are not supported by the APSUB-GM61 outputs.

9. No adjustments can be made manually using the programming button or the factory SWC when the module is connected to a PC.

10. If the vehicle is equipped with Active Noise Cancellation (ANC), the ANC can be disabled using the included ANC-GM03

harness. See page 3.

Wiring Connection Chart

To Factory

Amplier

To Amplier

Harness

ANC-GM03-HAR

The aftermarket amplier must have a very solid ground and the amplier power/ground connections

should be made before connecting the RCA's or Remote Turn On to the APSUB-GM61

Questions and Answers:

K
Kenneth VazquezJul 27, 2025
What to do if PAC APSUB module becomes unresponsive?
- C
  Caleb RuizJul 27, 2025
  If the PAC APSUB module becomes unresponsive or doesn't power up when the key is on, reset the interface. You can do this by turning the key to the ignition position, then pressing and holding the Power button on the factory radio for 12 seconds. Alternatively, press and hold the reset button on the side of the APSUB module for 10 seconds until the LEDs alternate flashing red.