LPH Harness Instruction Guide
Brand: PAC
Important Notes
All LPH harnesses are designed to work on OEM Non-Amplified systems.
All LPH harnesses are designed to be modular and used in various applications, including:
- Adding Multi-Channel Amplifiers Front (LPH-SPK(A) / (C))
- Adding Multi-Channel Amplifiers Rear (LPH-SPK(B) / (D))
- Adding Multi-Channel Amplifiers Front / Rear (LPH-SPK(A) / (B) / (C) / (D))
- Adding Mono Amplifier Standalone Subwoofer (LPH-SPK(E))
- Providing Power/Ground/ACC (LPH-SPK(F))
- Providing speaker inputs / outputs on all channels
If no powered accessories are going to be installed behind your radio, you will not need to use the LPH-SPK(F) pigtail. If you are using this harness, ensure your loose ends are connected prior to plugging into the main LPH harness. If not connected to a device or insulated, this could cause a short circuit.
Wiring Connection Chart (All Models)
| LPH-SPK (A) Front - Signal from AMP | LPH-SPK (B) Rear - Signal from AMP | LPH-SPK (C) Front - Signal to AMP | |||
|---|---|---|---|---|---|
| Wire Color | Function | Wire Color | Function | Wire Color | Function |
| White | Front Left (+) | Green | Rear Left (+) | White | Front Left (+) |
| White/Black | Front Left (-) | Green/Black | Rear Left (-) | White/Black | Front Left (-) |
| Gray | Front Right (+) | Violet | Rear Right (+) | Gray | Front Right (+) |
| Gray/Black | Front Right (-) | Violet/Black | Rear Right (-) | Gray/Black | Front Right (-) |
| LPH-SPK (D) Rear - Signal to AMP | LPH-SPK (E) Signal to AMP (SUB-T) | LPH-SPK (F) Power Extension | |||
|---|---|---|---|---|---|
| Wire Color | Function | Wire Color | Function | Wire Color | Function |
| Green | Rear Left (+) | Blue | Left (+) | Yellow | Constant 12V |
| Green/Black | Rear Left (-) | Blue/Black | Left (-) | Red | Accessory |
| Violet | Rear Right (+) | Red | Right (+) | Black | Ground |
| Violet/Black | Rear Right (-) | Red/Black | Right (-) | ||
LPH-SPK (E) can be used in both front or rear configurations based on user preference.
LPH-SPK (F) Not all vehicles will provide accessory signal (Red Wire).
Example Installations
Example Installation - Mono Amplifier - LPH-SPK(E)
This application involves splitting either the front or rear channels on the main LPH harness and inserting the LPH-SPK(E) harness in between. This provides a High-Level output for various devices such as an Amplifier, DSP, or LOC that can accept a high-level input signal. The LPH-SPK(F) can be used to provide Power, Ground, and in some cases Accessory connections for your audio adapter.
Diagram Description: The diagram shows a connection flow from an "OEM RADIO" to an "LPH TO RADIO CONNECTION". This connection splits into the "LPH-SPK(E)" harness, which connects to an amplifier (e.g., "LC2 i PRO AudioControl"), and the "LPH-SPK(F)" harness, which connects to the "LPH TO OEM HARNESS". The text advises testing the vehicle's factory speaker signal to verify low-level frequencies and notes that this setup maintains the factory speaker connection by bypassing it through the harness.
Example Installation - Multi-Channel Amplifier - LPH-SPK(A/B/C/D)
For this application, you will want to split either the front and/or rear channels on the main LPH harness and insert the LPH-SPK(A-D) harness in between. Harnesses LPH-SPK(C) and LPH-SPK(D) will provide a High-Level output for various devices such as an Amplifier, DSP, or LOC that can accept a high-level input signal. Harnesses LPH-SPK(A) and LPH-SPK(B) will allow you to run the output of your new aftermarket amplifier back through your factory wiring.
Diagram Description: The diagrams illustrate connecting the LPH-SPK(A/B/C/D) harnesses for multi-channel amplifier installations. The first diagram shows the split from the "OEM RADIO" via "LPH TO RADIO CONNECTION" to "LPH-SPK(A/B/C/D)" and "LPH TO OEM HARNESS", connecting to multiple amplifiers (e.g., "LC-1.1500 AudioControl", "LC-1.800 AudioControl", "LC-6.1200 AudioControl"). The second diagram shows a similar setup for multi-channel amplifiers, detailing the connections of LPH-SPK(C), LPH-SPK(D), LPH-SPK(A), and LPH-SPK(B) to the OEM harness and amplifiers.
