1. Introduction
The NVX XPLOC4 is a 4-channel adjustable line output converter designed to integrate an aftermarket amplifier with a factory or aftermarket stereo system that lacks dedicated RCA outputs. It converts high-level speaker signals into low-level RCA signals, enabling the addition of external amplifiers for enhanced audio performance. This unit features a 6:1 step-down ratio, adjustable gain output, and a DC amplifier turn-on trigger.
2. Key Features
- 4-Channel Operation: Supports front and rear speaker channels for comprehensive amplifier integration.
- Adjustable Gain Output: Allows precise matching of the output signal to the amplifier's input sensitivity.
- High Power Input Capability: Handles up to 600 watts total (150 watts per channel) from the source unit.
- DC Amplifier Turn-On Trigger: Provides a remote turn-on signal for the amplifier, eliminating the need for a separate remote wire from the head unit.
- Low Distortion Design: Engineered for high-quality audio signal conversion with minimal distortion.
3. Package Contents
Verify that all items are present in the package:
- NVX XPLOC4 4-Channel Line Output Converter
- Wiring Harness
- User Manual (this document)
4. Safety Information
Please read all instructions carefully before installation. Improper installation can result in damage to the device, vehicle, or personal injury. Always disconnect the vehicle's battery before beginning any electrical work. Consult a professional car audio installer if you are unsure about any part of the installation process.
5. Setup and Installation
5.1 Wiring Diagram
The following diagram illustrates the connections for the NVX XPLOC4. Ensure all connections are secure and properly insulated.
Image 1: NVX XPLOC4 unit showing the main body, wiring harness, and RCA outputs. This image provides an overview of the product's physical components and connections.
5.2 Connection Steps
- Disconnect Battery: Before starting, disconnect the negative terminal of your vehicle's battery to prevent electrical shorts.
- Identify Speaker Wires: Locate the speaker output wires from your factory or aftermarket head unit. These will be connected to the input side of the XPLOC4's wiring harness.
- Connect Speaker Inputs: Connect the corresponding speaker wires from your head unit to the input wires of the XPLOC4 harness. Match positive to positive and negative to negative for each channel (Front Left, Front Right, Rear Left, Rear Right).
- Power and Ground Connections:
- Connect the +12V (Yellow) wire from the XPLOC4 to a constant +12V power source.
- Connect the GND (Black) wire from the XPLOC4 to a solid chassis ground point.
- Remote Turn-On Output: The XPLOC4 provides a Remote (Blue) output wire. Connect this wire to the remote turn-on input of your aftermarket amplifier. This signal will turn on the amplifier when the head unit is active.
- RCA Output Connections: Connect the RCA output cables from the XPLOC4 to the RCA input jacks on your aftermarket amplifier. Ensure Front Left/Right and Rear Left/Right channels are correctly matched.
Image 2: Detailed view of the NVX XPLOC4's input speaker wire harness and the RCA output connections, illustrating the various wiring points.
6. Operating Instructions
6.1 Adjusting Gain Levels
The NVX XPLOC4 features adjustable gain controls for each channel pair (Front and Rear). These controls allow you to match the output level of the XPLOC4 to the input sensitivity of your amplifier, preventing distortion and optimizing sound quality.
Image 3: Side view of the NVX XPLOC4, highlighting the four blue gain adjustment screws and the red LED indicator light.
- Initial Setting: Turn the gain adjustment screws on the XPLOC4 all the way down (counter-clockwise).
- Amplifier Gain: Set the gain controls on your aftermarket amplifier to their minimum setting.
- Head Unit Volume: Turn your head unit volume up to about 75-80% of its maximum level.
- Adjust XPLOC4 Gain: Slowly turn the gain adjustment screws on the XPLOC4 clockwise until the red LED indicator light just begins to flicker or illuminate steadily. This indicates that the signal is approaching clipping. Back off slightly until the LED is off or only flickers minimally.
- Adjust Amplifier Gain: Once the XPLOC4 gains are set, slowly increase the gain on your amplifier until the desired volume and sound quality are achieved without audible distortion.
The red LED indicator on the XPLOC4 serves as a clipping indicator. If it illuminates brightly or constantly, the input signal is too high, and distortion may occur. Reduce the head unit volume or the XPLOC4 gain until the LED is off or only flickers occasionally on peak notes.
7. Maintenance
The NVX XPLOC4 is designed for reliable operation and requires minimal maintenance. Ensure the unit is installed in a dry location, away from excessive heat and direct sunlight. Periodically check all wiring connections to ensure they remain secure and free from corrosion.
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use harsh chemicals or abrasive cleaners.
- Ventilation: Ensure the unit has adequate ventilation to prevent overheating, although passive cooling is generally sufficient for this device.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from amplifier. |
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| Distorted sound. |
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| Humming or buzzing noise. |
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9. Specifications
| Feature | Specification |
|---|---|
| Model | XPLOC4 |
| Channels | 4-Channel |
| Maximum Input Power | 600W Total (150W per channel) |
| Step-Down Ratio | 6:1 |
| Output Type | RCA (Low-Level) |
| Input Type | Speaker Level (High-Level) |
| Remote Turn-On | DC Trigger Output |
| Dimensions (L x W x H) | 7.64 x 5.04 x 1.57 inches |
| Weight | 5.6 ounces |
10. Warranty and Support
For warranty information and technical support, please refer to the official NVX website or contact your authorized NVX dealer. Keep your purchase receipt as proof of purchase for warranty claims.
Online Support: www.nvx.com/support
