Best Converter For Car Audio

We researched converter options from major audio brands to determine the best line output converters currently available. By comparing manufacturer specifications and analyzing aggregated owner feedback, we evaluated sound quality, build durability, and installation complexity.

Our comparison focuses on units that effectively bridge factory radios with aftermarket amplifiers. We assessed how each converter handles signal processing and whether it maintains audio fidelity without introducing unwanted noise.

1. AudioControl LC2i Pro: Best Overall

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In our evaluation of the AudioControl LC2i Pro, we found its active circuitry significantly superior to standard passive units. The AccuBASS feature effectively restores bass lost in factory systems, a critical factor based on owner feedback regarding sound clarity.

However, we noted that this unit requires a connection to a 12V accessory power source, which complicates installation compared to passive models. Those looking for a simple plug and play solution without wiring to a fuse box might want to skip this converter.

• Active circuitry with high headroom
• 6-channel input and output options
• Optional remote level control capability

Pros: Excellent bass restoration for factory systems; High quality preamp outputs for clean sound
Cons: Requires connection to 12V accessory power

2. PAC Audio AOEM-2000: Best for Factory Systems

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We compared the PAC Audio AOEM-2000 to other interface modules and found it offers a distinct advantage for owners of supported vehicles. Its ability to sum signals and provide a clean audio path without tapping into factory wires is highly valued in owner reviews.

Based on the spec sheets, this unit is not universal. We determined that buyers should verify their specific vehicle compatibility before purchasing, as it will not function correctly with unsupported car models.

• Signal summing capability for complex factory systems
• Auto turn on circuit
• Solid build quality for long term use

Pros: Smooth integration with specific vehicle models; Reduces installation time with vehicle specific harnesses
Cons: Limited compatibility list compared to universal units

3. Kicker KEYLOC: Smartest Converter

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Our research highlighted the Kicker KEYLOC for its innovative load correction technology. It addresses the common issue of factory radios lowering volume when they detect an amplifier, ensuring consistent performance according to aggregated owner feedback.

While we appreciate the smart features, our evaluation suggests that the unit can be sensitive to grounding issues. Installers must ensure a very clean ground connection, or the device may produce unwanted noise or fail to operate correctly.

• Load correction technology prevents factory roll-off
• Automatic turn on and signal sensing
• Compact design for easy mounting

Pros: Intelligent load adjustment simplifies tuning; Very easy to use setup process
Cons: Can be sensitive to improper grounding

4. AudioControl LC2i: Reliable Runner-Up

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We evaluated the AudioControl LC2i and found it to be a solid, albeit aging, option in the converter market. It provides the essential features needed for most basic system upgrades, such as speaker level inputs and RCAs.

However, in our comparison to newer models, the LC2i lacks the advanced AccuBASS processing found in the Pro version. Audiophiles looking for the absolute best sound restoration or modern integration features should consider skipping this older unit.

• Main level control for easy adjustment
• GTO signal sensing turn on
• Auxiliary input for secondary devices

Pros: Proven track record in the car audio community; Decent sound quality for the price
Cons: Lacks advanced features of the newer Pro version

5. Metra 70-5520: Best T-Harness

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The Metra 70-5520 stands out in our research for its convenience, offering a T-harness solution that eliminates the need for cutting factory wires. This is a significant benefit for lease vehicles or those who wish to maintain a stock appearance.

Our evaluation indicates that the utility of this product is severely restricted by its compatibility list. It only fits specific Ford and Lincoln vehicles, making it a poor choice for anyone driving a different make or model.

• Retains factory wiring integrity
• No splicing required for installation
• Plug and play functionality

Pros: Non destructive installation process; Clean connection to factory radio
Cons: Extremely limited vehicle compatibility

6. PAC Audio SNI-15: Best Budget Passive

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We researched the PAC Audio SNI-15 as a viable solution for budget conscious builds. It uses a passive transformer design to convert speaker level signals to preamp level outputs without the need for external power.

Based on our analysis, the lack of active circuitry means the output voltage is lower, which can result in a need to gain match the amplifier more aggressively. Users with high end systems demanding maximum dynamic range might want to skip this basic converter.

• Transformer isolation for noise reduction
• Simple 2 wire input setup
• Ground isolation circuitry

Pros: Very affordable entry point; Simple and reliable basic function
Cons: Lower signal output than active units

7. Scosche SLC4: Budget Multi-Channel

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The Scosche SLC4 offers 4 channel conversion at a competitive price point, which caught our attention during the comparison phase. It allows users to retain fading capabilities and rear speaker control when adding a subwoofer amplifier.

However, based on aggregated owner feedback, we found a higher incidence of noise floor issues with this model compared to premium competitors. It is susceptible to engine whine and ground loops, making it a risky choice for high fidelity audio systems.

• 4 channel conversion for complex systems
• Adjustable output levels
• Universal fitment

Pros: Handles 4 channels at a low cost; Compact form factor
Cons: Prone to noise interference issues

Frequently Asked Questions

Do I need a line output converter for my car audio?

Yes, if you are adding an aftermarket amplifier to a factory radio, you need a converter. Factory radios do not have preamp RCA outputs, so a converter takes the high power speaker wire signal and converts it to a low level signal the amplifier can accept.

What is the difference between active and passive converters?

Active converters require a power connection and usually offer features like bass restoration and higher output voltage for cleaner sound. Passive converters do not need power and rely on transformers to step down the voltage, often resulting in lower sound quality.

Will a line output converter affect sound quality?

A high quality active converter will maintain or even improve sound quality by cleaning the signal and restoring bass. Lower quality passive units can introduce noise or distortion, so choosing a reputable brand is important based on our research.

How difficult is it to install a car audio converter?

Installation difficulty varies. Passive converters are simple and tap into speaker wires. Active converters require tapping into speaker wires and also connecting to a 12V power source and a ground, making the installation more complex.

What is load correction on a converter?

Load correction tricks the factory radio into thinking a speaker is still connected, preventing the radio from lowering volume or shutting down when it detects an amplifier. This ensures consistent volume levels according to manufacturer specs.

Our Verdict

Based on our research, the AudioControl LC2i Pro is the top pick for its exceptional AccuBASS circuitry and high output voltage, making it ideal for audiophiles. The PAC Audio AOEM-2000 is the runner up, offering a straightforward plug and play solution for specific vehicle integrations.

Video Guide

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