Table of Contents
What is a Line Output Converter?
A line output converter (LOC) is an essential device in car audio systems, especially when integrating aftermarket amplifiers with factory-installed radios. Its primary function is to convert the high-level speaker outputs from the factory radio or amplifier into low-level signals that can be safely fed into aftermarket amplifiers, subwoofers, or other audio components. This conversion is crucial because most aftermarket amplifiers require line-level inputs (typically RCA connectors) rather than speaker-level inputs to function correctly and avoid damage. Factory-installed audio systems can produce speaker signals with voltages up to 40 volts, which are too high for standard amplifiers, making the LOC a necessary component.
The necessity of a line output converter arises because factory radios often do not provide dedicated preamp outputs, or their outputs may not be compatible with aftermarket equipment. By stepping down the signal voltage from speaker wires, the LOC ensures that the amplifier receives a clean, noise-free signal at the appropriate voltage level, which helps maintain sound quality and prevent distortion. Signal converters should also handle total harmonic distortion (THD) and noise specifications to ensure optimal audio performance.
Additionally, some LOCs are equipped with features such as remote turn-on capabilities, allowing them to automatically power on the amplifier when audio is detected, eliminating the need for a separate remote wire. Advanced models may include adjustable gain controls, subwoofer outputs, and bass boost functions to enhance audio performance and customization. Active LOCs can also filter out electrical interference that can cause noise issues in audio systems, further improving sound quality. Ground isolation features in some models help eliminate buzzing or whining noises, ensuring a cleaner audio experience.
Understanding what a line output converter does and how it functions is fundamental for anyone looking to upgrade their car stereo system without replacing the entire factory head unit. It bridges the gap between factory-installed equipment and aftermarket audio components, enabling users to enjoy improved sound quality and greater system flexibility. Active LOCs strengthen weak signals, while passive LOCs are better suited for low-power systems, offering options for different audio setups. Additionally, LOCs can convert signals from bridge tied load (BTL) configurations back to single-ended configurations, ensuring compatibility with a variety of audio systems. The Wavtech Link DQ is an LOC that can handle a high 40V input signal and provides a strong output, making it a robust choice for demanding setups.
Types of Line Output Converters
Line output converters come in various types, each designed to meet different needs and preferences in car audio upgrades. Understanding these types can help you choose the best line output converter for your vehicle and audio setup.
Transformer-Based Line Output Converters
Transformer-based LOCs are the traditional type and use coils of wire (transformers) to step down the high-level speaker signals to low-level outputs. These units are generally more affordable and simple in design. However, they can introduce some distortion and may not provide the cleanest audio signal, especially at low frequencies. Due to their analog nature, transformer-based converters might also have a limited frequency response and can sometimes add noise to the audio signal. Despite these drawbacks, they remain a popular choice for budget-conscious users or basic installations.
Electronic Line Output Converters
Electronic LOCs utilize solid-state components such as operational amplifiers (op-amps) to convert and reduce the speaker-level signals to line-level outputs. These converters offer superior sound quality with minimal distortion and a flat frequency response, preserving the integrity of the original audio signal. They often include additional features like adjustable gain controls, bass boost, and remote turn-on capabilities. Electronic LOCs tend to be more expensive than transformer-based units but are generally preferred by audiophiles and those seeking the best possible sound quality from their car audio system.
Multi-Channel Line Output Converters
Some line output converters are designed to handle multiple audio channels simultaneously, providing separate outputs for front, rear, and subwoofer amplifiers. These multi-channel units are ideal for complex audio systems where multiple amplifiers or speakers are involved. They allow for individual level adjustments on each channel, enabling precise tuning and better integration with the factory audio system. Signal summing in multi-channel active LOCs combines different frequency ranges into a full-range output, ensuring compatibility with a variety of setups. The AudioControl LC7i, for example, accommodates more than 2 audio channels, offering 3 input and 3 output channels along with remote level control for the subwoofer, making it a versatile choice for advanced audio configurations.
Integrated Line Output Converters
Certain aftermarket amplifiers come with built-in line output converters, eliminating the need for a separate LOC device. These integrated solutions simplify installation and reduce wiring complexity. However, not all amplifiers have this feature, so it’s important to verify compatibility before purchasing.
Specialized Line Output Converters
There are also specialized LOCs designed for specific vehicle makes, models, or factory audio systems. These converters often come with plug-and-play harnesses tailored to the vehicle’s wiring, making installation easier and reducing the risk of wiring errors. Some specialized units include advanced features like signal equalization, noise filtering, and digital signal processing to further enhance audio performance. Load simulation is another crucial feature in these units, preventing factory systems from muting audio when a speaker load is not detected.
Choosing a Line Output Converter
Selecting the right line output converter for your car audio system is essential to achieving the best sound quality and system compatibility. Several factors should be considered when making your choice to ensure that the LOC meets your specific needs and integrates seamlessly with your vehicle’s audio setup.
Compatibility with Your Vehicle and Audio System
First and foremost, ensure that the line output converter is compatible with your factory radio and amplifier. Some LOCs are designed as universal units that work with a wide range of vehicles, while others are specialized for particular makes and models, offering plug-and-play harnesses for easier installation. Checking compatibility helps avoid wiring complications and ensures optimal signal conversion.
Number of Channels and Outputs
Consider how many audio channels your system requires. Basic LOCs typically offer two channels (left and right), suitable for simple stereo setups or adding a single amplifier. However, if your system includes multiple amplifiers for front, rear, and subwoofer speakers, a multi-channel LOC with individual outputs and gain controls for each channel will provide better flexibility and sound tuning.
Features and Adjustability
Look for features that enhance usability and audio performance. Adjustable gain controls allow you to fine-tune the output levels to match your amplifier’s input sensitivity, preventing distortion or weak signals. Some LOCs include bass boost or AccuBASS technology to compensate for low-frequency loss in factory audio systems, delivering richer bass response. Remote turn-on functionality can simplify installation by automatically powering your amplifier when audio is detected. The Kicker KMLC, a two-channel LOC, is known for its high-quality signal and enhanced bass response, handling up to 50W input, making it a reliable option for improved audio performance.
Build Quality and Signal Integrity
High-quality components and solid construction contribute to better signal integrity and durability. Electronic LOCs with solid-state circuitry generally provide cleaner signal conversion with minimal distortion and noise compared to transformer-based units. Investing in a reputable brand known for reliable performance can make a significant difference in your system’s overall sound quality.
Installation Considerations
Ease of installation is another important factor. Some LOCs come with detailed instructions, color-coded wiring, and mounting accessories to facilitate a smooth setup. Specialized units with vehicle-specific harnesses reduce the risk of wiring errors and save installation time. If you are not comfortable with automotive wiring, professional installation is recommended to avoid damage and ensure proper operation. Turn-on modes in some LOCs include options like 12V accessory input, audio turn-on, or GTO (Goes To Overload) signal sensing, which can further simplify the installation process and enhance functionality.
Budget and Value
Finally, consider your budget and the value offered by different line output converters. While transformer-based LOCs are more affordable, they may compromise on sound quality. Electronic LOCs typically cost more but offer superior audio performance and additional features. Balancing cost with your audio goals will help you select the best LOC that provides lasting satisfaction and enhances your car stereo experience.
Top Line Output Converters
AudioControl LC2i PRO
- Two channels of active speaker level inputs (up to 40V, 400 watts RMS power...
- Compact chassis design for discreet installation
- 9.5V Main and Bass preamp outputs with level-matching controls
The AudioControl LC2i PRO is widely regarded as one of the best line output converters available, particularly favored by car audio enthusiasts who demand high performance and flexibility. This unit is designed to provide superior sound quality by converting speaker-level signals to line-level outputs with minimal distortion and noise, ensuring that your aftermarket amplifier receives a clean and accurate audio signal. AudioControl is a leading brand for high-performance active LOCs, known for their reliability and advanced features. The LC2i PRO is specifically designed for installing a subwoofer and amplifier, allowing for optimal bass control and an enhanced listening experience.
One of the standout features of the LC2i PRO is its AccuBASS technology, which compensates for the low-frequency loss commonly experienced with factory-installed audio systems. This feature allows users to restore deep, rich bass without distortion, greatly enhancing the overall listening experience. AccuBASS technology is particularly effective in restoring lost bass frequencies in factory systems that roll off low-end audio, ensuring a fuller and more dynamic sound.
Installation is made easier with the LC2i PRO’s built-in load resistors, which help maintain proper electrical load on factory speaker outputs when speakers are disconnected or bypassed. Additionally, the unit features a signal-sensing remote turn-on that automatically powers your amplifier when audio is detected, eliminating the need to run a separate remote wire and simplifying the wiring process.
Durability and build quality are other strong points of the LC2i PRO. It is constructed with high-quality components designed to withstand the harsh automotive environment, ensuring reliable performance over time. The compact design allows for discreet installation in tight spaces behind the dash or under seats.
NVX XLCA2 X-Series PRO
- 2-Channel Line Out Converter with Adjustable xBOOST corrects for bass...
- Handles up to 30V (225 watts RMS) and Provides up to 9.5 Volts of output
- Auto turn-on via DC offset or Audio detection
The NVX XLCA2 X-Series is another excellent choice among the best line output converters available today. It is designed to provide high-quality audio signal conversion with minimal distortion and noise, ensuring that your aftermarket amplifier receives a clean and accurate signal. This unit features a compact design, making it easy to install discreetly in your vehicle without taking up much space.
One of the key advantages of the XLCA2 is its versatility and ease of use. It supports both 2-channel and 4-channel inputs, allowing it to accommodate a variety of factory audio systems and amplifier configurations. The converter includes adjustable gain controls, enabling users to fine-tune the output levels to match their specific amplifier requirements. This adjustability helps prevent distortion and ensures optimal sound quality across all volume levels.
The NVX XLCA2 also comes equipped with a remote turn-on feature that activates the connected amplifier automatically when an audio signal is detected. This eliminates the need for running a separate remote wire, simplifying the installation process. Its robust construction and high-quality components contribute to reliable performance and longevity, even under the demanding conditions inside a vehicle.
Scosche LOC2SL
- Unmatched Versatility - Compatible with a wide range of car audio systems,...
- Seamless Integration - Effortlessly integrate your factory stereo with an...
- Enhanced Audio Experience - Transform your car audio system with the...
The Scosche LOC2SL is a budget-friendly and reliable line output converter that has gained popularity among car audio enthusiasts looking for a straightforward solution to integrating aftermarket amplifiers with factory audio systems. Despite its affordable price, the LOC2SL offers solid performance, making it an excellent choice for those who want to add a subwoofer or amplifier without breaking the bank. Priced around $20, it includes basic features such as remote subwoofer level control and individual level controls.
One of the key features of the Scosche LOC2SL is its simplicity and ease of installation. It is designed with user-friendly wiring and clear instructions, allowing even beginners to complete the setup with minimal hassle. The unit includes individual level controls for fine-tuning the output signal, giving users the ability to adjust the balance between the main and subwoofer outputs to suit their listening preferences.
The LOC2SL also supports remote turn-on functionality, which can be triggered by the audio signal, eliminating the need for a separate remote wire in many installations. This feature simplifies wiring and reduces clutter, making it ideal for clean and efficient setups.
While it may lack some of the advanced features found in higher-end models, such as AccuBASS technology or multiple channel outputs, the Scosche LOC2SL delivers dependable performance and clear sound quality. Its robust build ensures durability and consistent operation in the demanding automotive environment.
Conclusion
Line output converter is a critical component of any car audio system, providing high-quality sound and reliable performance. When choosing a converter, it is important to consider factors such as sound quality, compatibility, and ease of installation. Look for products that offer clear and powerful sound and are compatible with your car audio system to ensure the best results. High-quality line output converters, like the Wavtech Link2, provide better performance in terms of frequency response and lower distortion compared to transformer-based converters. The Wavtech Link DQ, for instance, can handle a high 40V input signal and provides a strong output, making it a robust choice for demanding setups. High-quality splice adapters are also designed to connect behind the OEM headunit before routing to an aftermarket amplifier, ensuring a seamless and efficient setup.
FAQ
Why do I need a line output convertor?
You need an LOC when your amplifier only accepts line-level inputs (RCA inputs) and your factory audio system does not provide these outputs. This ensures compatibility and protects your equipment from damage.
Can I install a line output converter myself?
Yes, many line output converters are designed for straightforward installation. However, accessing speaker wires behind the dash or panels may require some skill and tools. Following the manufacturer’s instructions carefully and using proper wiring techniques is important. If you’re not confident, professional installation is recommended to avoid mistakes and ensure optimal performance.
How do I choose the best line output converter for my car?
Choosing the best LOC depends on your car audio system setup and your goals. Consider the number of channels you need, compatibility with your factory radio, features like remote turn-on, gain controls, and bass adjustment. Reading reviews and selecting reputable brands can help you find a reliable unit that delivers clean, dynamic sound.
Will a line output converter improve my sound quality?
A high-quality line output converter can significantly improve sound quality by providing a clean, noise-free signal to your amplifier. It reduces distortion and noise that can occur when connecting directly to speaker wires. Some LOCs also offer features like bass boost or adjustable gain, allowing you to fine-tune your system’s performance.
Are there different types of line output converters?
Yes, there are primarily two types: transformer-based and fully electronic converters. Transformer-based LOCs use coils to step down voltage but may add distortion or alter frequency response. Fully electronic LOCs use solid-state components for cleaner signal conversion and better overall audio performance.