Introduction
The AudioControl LC2i is a 2-channel line-out converter (LOC) designed to enhance factory audio systems by allowing the addition of external amplifiers while maintaining the integrity of the original equipment. It is particularly useful for users who wish to add a subwoofer and amplifier without compromising the functionality of their factory-installed audio components—such as volume control, steering wheel controls, and preamp outputs.
According to the manufacturer, the LC2i features AccuBass technology, which corrects the bass roll-off common in factory audio systems. It accepts speaker-level signals up to 400 watts per channel and provides 9.5V preamp outputs that can be used to drive an external amplifier. The device is compact, designed for discreet installation, and includes options such as mounting flanges and an optional remote bass level control (sold separately). Installation requires hardwired power and ground connections, and it is often used in conjunction with subwoofers and mono amplifiers for enhanced bass performance.
User experiences, as documented in various forums and installation threads, highlight the LC2i's utility in retrofitting factory systems with minimal disruption. However, the installation process can vary depending on the vehicle model and the existing wiring configuration. This article provides a detailed breakdown of the LC2i’s features, installation requirements, and practical considerations based on available documentation and user reports.
Key Features of the AudioControl LC2i
The AudioControl LC2i offers a set of features tailored for users looking to enhance their factory audio systems without overhauling the entire setup. These features are detailed in the official product description and align with its intended use in car audio systems.
1. Dual-Channel Active/Speaker-Level Input
The LC2i is a two-channel line-out converter that accepts active or speaker-level signals, making it compatible with a wide range of factory-installed head units and amplifiers. It is capable of handling up to 400 watts of power per channel, ensuring that it can integrate seamlessly with high-output systems. This feature is particularly beneficial for users who wish to retain their factory amplifier while adding an external subwoofer amplifier.
2. Preamp Output and Level Matching
The LC2i generates high-quality preamp outputs with a maximum of 9.5V RMS and 13V peak. These outputs can be connected to an external processor or amplifier, allowing for the addition of components such as subwoofers or digital signal processors. The device also includes level matching controls, which enable users to fine-tune the output levels to match the input of the connected amplifier or processor.
3. AccuBass Technology
One of the standout features of the LC2i is its AccuBass technology, which is designed to correct the bass roll-off that is common in many factory audio systems. This ensures that the bass response remains consistent across different listening environments and does not diminish when the system is upgraded. The device also includes threshold and level controls for further optimization of bass performance.
4. GTO Turn-On Circuitry
The LC2i includes a selectable GTO (Ground Triggered Output) turn-on circuit, which eliminates the need for a remote wire to activate the external amplifier. This simplifies the installation process and reduces the number of wires that need to be routed within the vehicle.
5. Mounting and Power Requirements
The device requires hardwired power and ground connections for operation, which is a common requirement for most line-out converters and amplifiers. It also features integrated mounting flanges, allowing for flexible installation options depending on the vehicle’s interior configuration.
6. Optional Remote Control
An optional remote bass level control is available for purchase separately. This feature allows users to adjust the bass output while driving, providing greater control over the audio experience without needing to access the LC2i itself.
Installation Requirements and Practical Considerations
The installation of the AudioControl LC2i involves several steps, including sourcing the correct power supply, connecting the speaker-level inputs, and routing the preamp outputs to the desired amplifier or subwoofer. While the process is generally straightforward, users should be aware of certain technical and logistical considerations.
1. Power and Ground Connections
As stated in the official documentation, the LC2i requires hardwired power and ground connections. This means that the device must be connected directly to the vehicle’s battery or an existing power circuit that can supply sufficient current. Users should ensure that the power and ground connections are made securely and that proper fusing is in place to prevent electrical issues or damage to the vehicle’s wiring system.
2. Speaker-Level Input Configuration
The LC2i is designed to accept speaker-level signals, which means that it can be connected directly to the factory amplifier or the speaker wires from the factory head unit. In most cases, users will need to locate the appropriate speaker wires—typically in the rear or under the dashboard—and connect them to the LC2i’s input terminals. This allows the LC2i to process the signal before sending it to the preamp output.
Some users have reported success by tapping into the rear speaker wires located in the B-pillar of their vehicles, as mentioned in a forum post. However, this method may vary depending on the vehicle model and the location of the factory wiring harness. In some cases, it may be necessary to access the Bose amplifier, located in the rear left of the vehicle, to find the appropriate speaker wires.
3. Preamp Output Connections
Once the LC2i is receiving a signal, the preamp outputs can be connected to an external amplifier or subwoofer. The LC2i provides RCA outputs for this purpose, and users should ensure that the amplifier is compatible with the signal level provided by the LC2i. The signal-to-noise ratio of the LC2i is greater than 110 dB, ensuring that the preamp output is clean and free from interference.
4. Remote Turn-On Circuitry
The LC2i’s optional GTO turn-on circuit eliminates the need for a remote wire to activate the external amplifier. However, users should verify whether this feature is necessary for their specific setup. In some cases, the amplifier may require a separate remote trigger, which would need to be connected to the vehicle’s ignition system.
5. Optional Remote Bass Control
The optional remote bass level control allows for real-time adjustments to the bass output while driving. If this feature is desired, users should ensure that the control unit is mounted in a convenient location and that the wiring is properly secured to prevent interference or damage.
User Experiences and Installation Tips
While the official documentation provides a clear overview of the LC2i’s features and requirements, user experiences from online forums and installation threads offer additional insights into the practical aspects of the device. These insights can help users prepare for potential challenges and streamline the installation process.
1. Compatibility with Factory Systems
Several users have reported that the LC2i works well with factory audio systems, particularly those equipped with Bose components. In one case, a user successfully integrated the LC2i with a Skar VVX 15 subwoofer and Skar 800.1 mono amplifier. The LC2i was mounted to the front of a custom-built enclosure, and the speaker-level inputs were tapped into the rear speaker wires in the passenger side B-pillar.
However, not all factory systems may be compatible without modification. In one forum discussion, a user with a 2013 Nissan 370Z and factory Bose system was advised that the LC2i might not be the best solution due to the requirement for three inputs in the vehicle’s audio system. In such cases, alternative line-out converters with more input channels may be necessary.
2. Wiring and Signal Routing
Wiring the LC2i typically involves identifying and connecting the correct speaker wires. According to one user, the +12V power wire is yellow (Pin 11), the ground is black (Pin 12), and the remote input is white (Pin 31). The subwoofer positive is typically light green or red (Pin 9), and the negative is yellow or brown (Pin 14). The remote output should be connected to the new subwoofer amplifier.
It is important to note that wire colors and pin assignments can vary depending on the vehicle and the factory wiring harness. Users should refer to the vehicle’s wiring diagram or consult with a professional installer to ensure that the correct connections are made.
3. Mounting and Space Considerations
The LC2i is designed to be compact, but users should still plan for its placement within the vehicle. In some installations, the device was mounted directly to the subwoofer enclosure, while in others, it was placed in the trunk or under the dashboard. The mounting flanges provided with the LC2i allow for secure and flexible installation.
Some users reported that the LC2i fit well in most factory systems, but it is important to ensure that the device is not obstructed and that all connections are accessible for future adjustments or troubleshooting.
4. Configuration and Tuning
After installation, users may need to adjust the LC2i’s settings to optimize the audio performance. The device includes threshold and level controls for bass response, as well as preamp output level adjustments. These settings can be fine-tuned based on the user’s preferences and the characteristics of the external amplifier and subwoofer.
Some users recommended using the optional remote bass control to make real-time adjustments while driving. This feature can be particularly useful for users who frequently switch between different listening environments or who prefer to customize the bass output based on the type of music being played.
Troubleshooting and Common Issues
Despite its reliability, the AudioControl LC2i may encounter certain issues during or after installation. Based on user reports, the following are some of the most common problems and their potential solutions.
1. No Output from Preamp
If the LC2i is not producing any preamp output, users should first check the power and ground connections to ensure that the device is receiving sufficient power. It is also important to verify that the speaker-level inputs are properly connected and that the signal is being fed into the LC2i.
In some cases, the issue may be related to the factory audio system. For example, if the factory amplifier is not sending a signal to the LC2i, the device will not generate any output. Users should test the signal by using a multimeter or by connecting the LC2i directly to the factory head unit.
2. Low or Distorted Output
Low or distorted output can be caused by incorrect gain settings or improper signal routing. Users should check the threshold and level controls on the LC2i and adjust them according to the input signal. If the signal is too strong, the LC2i may be overdriving the output, resulting in distortion.
Another common cause of low output is a mismatch between the LC2i’s output and the connected amplifier. Users should ensure that the amplifier is compatible with the LC2i’s output level and that the input sensitivity is set correctly.
3. No Remote Turn-On
If the GTO turn-on circuit is not activating the external amplifier, users should check the remote input and output connections. The remote input should be connected to a 12V source that is triggered when the vehicle is turned on, and the remote output should be connected to the amplifier’s remote trigger input.
If the GTO circuit is not functioning as expected, users may need to install a separate remote wire to activate the amplifier manually.
4. No Remote Bass Control
If the optional remote bass control is not working, users should check the wiring and ensure that the control unit is properly connected to the LC2i. It is also possible that the control unit is defective or that the signal is not being transmitted correctly.
In some cases, users may need to recalibrate the remote control or consult the manufacturer for troubleshooting assistance.
Conclusion
The AudioControl LC2i is a versatile and reliable line-out converter that allows users to enhance their factory audio systems with minimal disruption. Its key features—such as AccuBass processing, 9.5V preamp outputs, and optional remote control—make it an excellent choice for users who want to add a subwoofer and amplifier while retaining the functionality of their original equipment.
Installation of the LC2i involves connecting the power and ground wires, routing the speaker-level inputs, and linking the preamp outputs to an external amplifier. While the process is generally straightforward, users should be prepared for variations in wiring configurations depending on the vehicle model and factory system.
User experiences and forum discussions highlight the LC2i’s compatibility with factory systems, the importance of proper wiring and signal routing, and the value of optional features such as the remote bass control. By following the manufacturer’s guidelines and incorporating practical tips from experienced users, the LC2i can be successfully integrated into a wide range of car audio setups.
For those who are new to car audio installation, it is recommended to consult with a professional or refer to detailed installation guides to ensure a smooth and successful setup.