Introduction
The AudioControl LC2i PRO is a 2-channel line output converter designed to integrate aftermarket amplifiers into audio systems that utilize a factory head unit. It converts speaker-level signals from your factory system into high-quality RCA pre-amp signals, allowing for the addition of external amplifiers and subwoofers. The LC2i PRO features AccuBASS processing to restore bass response that is often rolled off by factory systems, and GTO Signal Sense for automatic turn-on.
Key Features
- Two channels of active speaker level inputs, supporting up to 40V (400 watts RMS) power handling.
- Compact chassis design for discreet installation in various vehicle types.
- 9.5V Main and Bass preamp outputs with independent level-matching controls.
- AccuBASS processing for bass roll-off correction, enhancing low-frequency output.
- Active circuitry designed to improve sound quality without compromising bass response.
- Adjustable Threshold and Level controls for fine-tuning AccuBASS processing.
- Load Select switch for matching various factory system impedance requirements.
- Multiple Trigger Mode options: GTO Signal Sense, Audio, and Remote In for flexible turn-on.
Package Contents
Verify that all items are present in the package:
- AudioControl LC2i PRO Unit
- ACR-1 Remote Level Control
- Wiring Harness (for power and speaker inputs)
- Mounting Hardware (screws)
- AudioControl Branded Pick (accessory)
Setup and Installation
Proper installation is crucial for optimal performance. If you are unsure about any steps, consult a professional installer.
Wiring Diagram
Connections
- Power Connections: Connect the +12V terminal to a constant +12V power source. Connect the Ground terminal to a solid chassis ground point.
- Remote In/Out: The Rmt In terminal can be connected to a switched +12V source if not using GTO or Audio trigger modes. The Rmt Out terminal provides a +12V signal to turn on your aftermarket amplifier.
- Speaker Level Inputs: Connect the factory speaker wires (positive and negative for left and right channels) to the corresponding Speaker Inputs on the LC2i PRO. Ensure correct polarity.
- RCA Outputs: Connect the Main Output RCA cables to your full-range amplifier inputs. Connect the Bass Output RCA cables to your subwoofer amplifier inputs.
- ACR-1 Remote: Connect the ACR-1 remote level control to the dedicated port on the LC2i PRO. Mount the ACR-1 in an accessible location for easy bass level adjustment.
Initial Settings
- Load Select Switch: This switch adjusts the input impedance to match your factory system. Experiment with the 20Ω, 60Ω, and 20kΩ settings to find the one that provides the cleanest signal and prevents factory system errors.
- Trigger Mode Switch: Select the desired turn-on method for the LC2i PRO.
- Rmt In: Uses a traditional +12V remote turn-on signal.
- GTO (Great Turn-On): Detects a signal from the factory head unit to turn on the LC2i PRO and connected amplifiers.
- Audio: Turns on the unit when an audio signal is detected.
- Ground Isolation Switch: This switch helps eliminate ground loop noise. Try the GND, ISO, and 200Ω settings if you experience unwanted noise in your system.
Operation and Adjustment
Once installed, the LC2i PRO requires proper adjustment to achieve optimal sound quality.
Level Matching
- Main Output Level: Adjust this knob to match the input sensitivity of your full-range amplifier. The Maximized indicator LED will illuminate when the output signal is optimized without clipping.
- Bass Output Level: Adjust this knob to match the input sensitivity of your subwoofer amplifier. The Maximized indicator LED will illuminate when the output signal is optimized without clipping.
AccuBASS Control
AccuBASS processing helps restore bass frequencies that factory systems often reduce at higher volumes.
- AccuBASS Level: This knob controls the amount of bass restoration applied. Adjust to your preference.
- AccuBASS Threshold: This knob sets the volume level at which the AccuBASS processing begins to engage. Set it to the point where your factory system starts to roll off bass.
ACR-1 Remote Level Control
The ACR-1 remote allows for convenient adjustment of the bass output level from your listening position. This control only affects the Bass Output RCA channels.
Maintenance
The AudioControl LC2i PRO requires minimal maintenance. Keep the unit free from dust and moisture. Periodically check all wiring connections to ensure they are secure and free from corrosion. Do not use harsh chemicals or abrasive cleaners on the unit.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Power | Incorrect +12V, Ground, or Remote connection. Blown fuse. | Verify all power connections. Check the fuse on the +12V line. Ensure the Trigger Mode is correctly set. |
| No Sound Output | Incorrect speaker input or RCA output connections. Output levels set too low. Amplifier not turning on. | Check all speaker input and RCA output cables. Increase Main and Bass Output Level controls. Verify amplifier remote turn-on. |
| Distorted Sound | Input signal too high. Output levels set too high. Incorrect Load Select setting. | Reduce factory head unit volume. Adjust Main and Bass Output Level controls. Experiment with Load Select settings. |
| Hissing or Engine Noise | Ground loop interference. Poor wiring. | Adjust the Ground Isolation switch. Ensure all ground connections are solid. Reroute RCA cables away from power wires. |
Specifications
| Feature | Specification |
|---|---|
| Brand | AudioControl |
| Model Number | LC2i PRO |
| Number of Channels | 2 |
| Maximum Input Handling | 40V / 400W (20 kΩ setting) |
| Maximum Output Level | 9.5 Vrms |
| Output Gain | +/- 12 dB |
| ACR-1 Attenuation Range | 0 dB to -19 dB |
| Frequency Response | 20 Hz to 50 kHz |
| Total Harmonic Distortion | <0.01% |
| Signal to Noise Ratio | >110 dB |
| Input Impedance | Selectable (20 Ω, 60 Ω, 20 kΩ) |
| Output Impedance | 150 Ω |
| Power Draw | 200 mA |
| Recommended Fuse Rating | 1 Amp |
| Product Dimensions (L x W) | 6.9" x 3" |
| Item Weight | 1 pound |
Warranty Information
AudioControl products typically come with a 5-year warranty. For specific warranty terms and conditions, including registration requirements and claim procedures, please refer to the official AudioControl website or the documentation included with your purchase.
Support and Contact
For further assistance, technical support, or to view additional resources such as FAQs and firmware updates, please visit the official AudioControl website:
