Best Car Audio Line-Out Converters for High and Low Output Signals
Looking to add an aftermarket amplifier or subwoofer to a factory radio? This guide highlights top line-out converters that transform high-level speaker signals into clean, low-level RCA outputs. Best for urban drivers, weekend hobbyists, and audio enthusiasts who want clearer bass and detailed highs without complex rewiring. Below, five tested options cover most budgets and vehicle setups. A quick reference table follows to help you compare at a glance.
Buying quick-reference
| Product | Best For | Key Benefit |
|---|---|---|
| Kicker 46KISLOC2 | All-around performance | Automatic DC offset conversion with remote turn-on |
| Scosche LOC2SL | Ease of install | Flexible installation and remote control knob |
| AudioControl LC1i | Subwoofer add-ons | High-channel power handling and impedance matching |
| AudioControl LC2i | Bass boost and compact installs | AccuBASS for better bass at higher volumes |
| CT Sounds CT-LC2 | Bass-focused systems | BassLift technology for factory bass restoration |
Kicker 46KISLOC2 K-Series Stereo Line-Output Converter
The KISLOC2 converts a factory radio’s speaker signal into both an RCA output and a remote turn-on wire for a 12-volt amplifier. It accepts up to 55 watts (16 volts) of input signal, making it suitable for moderate aftermarket upgrades. Best for drivers who want a straightforward install with minimal signal loss and a dedicated remote feature. Limitations include reliance on DC offset compatibility and potential mismatch with very high-power systems.
Scosche LOC2SL Line Output Converter with Remote Control Knob
The LOC2SL offers high-to-low signal conversion with a user-friendly remote control knob for level adjustments. It supports multiple installation options and is well-suited for adding an aftermarket amp or subwoofer while maintaining factory wiring simplicity. Best for: installers needing flexible mounting and adjustable output. Caution: some users may prefer additional bass management if their system is already bass-heavy.
AudioControl LC1i Active 2-Channel Line Driver & Line Output Converter
The LC1i converts speaker-level signals up to 400W per channel and includes a high-quality pre-amp output for aftermarket subwoofers and amplifiers. It emphasizes impedance matching and distortion-free signal, supporting easy integration with modern vehicles. Best for: adding a single sub or amp in tight spaces. Limitation: mid-range power handling may be modest for very high-demand systems.
AudioControl LC2i 2-Channel Line Output Converter with AccuBASS
LC2i adds a robust line driver and AccuBASS processing, which helps restore bass when the factory radio increases volume. It supports up to 400W per channel and is designed for clean signal delivery to subs and processors. Best for: users who want improved bass response while preserving OEM features. Caution: ensure your factory system can provide sufficient signal for the enhanced output.
CT Sounds CT-LC2 2-Channel Premium Line-Out Converter
The CT-LC2 provides a two-channel line-out with BassLift technology to compensate for factory bass roll-off. It offers a full-range main output and a dedicated bass output for subs, suitable for deeper sound staging. Best for: those seeking a bass-focused upgrade with straightforward installation. Limitation: bass enhancement may require careful tuning to avoid overloading the system in small cabins.
Buying Guide
What should you consider when choosing a line-out converter?
- Power handling: Choose a converter that matches your amplifier’s input power to avoid distortion.
- Impedance compatibility: Some models offer multiple load options; ensure compatibility with your factory speakers.
- Output type: RCA outputs are standard for subwoofers and amps; confirm your amp accepts the connector type.
- Install practicality: Remote turn-on, adjustable gains, and compact chassis can simplify installation.
- Signal integrity: Look for features like bass restoration (AccuBASS or BassLift) to avoid loss of low-end thump.
Frequently Asked Questions
- What is a line-out converter used for?
It converts high-level speaker signals to low-level RCA signals to power aftermarket amplifiers or subwoofers.
- Do I need a remote turn-on for my amplifier?
Remote turn-on ensures the amplifier powers on with the head unit; many converters include this feature.
- Can these converters preserve factory features?
Many models maintain compatibility with factory heads or modules and offer seamless integration with modern vehicles.
- What is AccuBASS or BassLift?
These are processing features that restore bass response when signals are boosted, improving perceived depth.
- Is installation in a small car more challenging?
Yes, some converters are compact, but routing lines and mounting brackets may require planning for limited space.
- Which is best for a subwoofer upgrade?
Converters with dedicated bass outputs and high headroom, such as LC2i or CT-LC2, are well-suited for subs.