Best Active Line Out Converters for Car Audio Upgrades
Choosing the right active line out converter (LOC) can help you upgrade factory car audio without replacing the head unit. This guide highlights top-rated LOCs that convert speaker-level signals to high-quality line-level outputs, enabling clean bass and clearer highs when driving with aftermarket amps and subs. Each entry includes key features, installation notes, and practical considerations to help you compare options quickly.
| Product | Brand | Key Feature | Power Handling | Approximate Use |
|---|---|---|---|---|
| AudioControl LC2i | AudioControl | AccuBASS and speaker-to-RCA conversion | 400W per channel | Subwoofers/Processors |
| Kicker KISLOC2 | KICKER | DC offset, remote turn-on, RCA output | Up to 55W input | Amplifier upgrades |
| CT Sounds CT-LC2 | CT Sounds | BassLift technology | 2-channel | Clear factory bass restoration |
| AudioControl LC2i PRO | AudioControl | AccuBASS, dash remote option | 400W per channel | Factory radio with sub/amp |
| Skar Audio SKE2LOC | Skar Audio | Turn-on options, bass & main controls | DC/Audio Sense | Active system upgrades |
Below are five selected models, chosen for compatibility with typical factory radios, ease of installation, and flexible control over bass and output levels. Each entry includes a product image, a direct link to the Amazon listing, and a concise feature summary to help you compare at a glance.
Note: This guide presents objective specifications and use cases without pricing, aiming to help you assess fit for your vehicle’s audio goals.
AudioControl LC2i 2-Channel LOC with AccuBASS
Upgrade your audio system while preserving factory stereo. The LC2i converts speaker-level signals up to 400W per channel from OEM radios or amplifiers into high-quality pre-amp outputs for aftermarket subs, amplifiers, or processors. AccuBASS technology restores bass response as volume increases, reducing roll-off that can mar low-end presence. Its compact chassis and mounting brackets simplify installation without occupying excessive space in the dash or kick panel. Ideal where a compact, high-power LOC is needed to drive a sub or multi-channel amp.
Kicker KISLOC2 K-Series Line-Out Converter
Designed to add an amplifier to nearly any radio using factory speaker wires, the KISLOC2 converts the speaker signal into both an RCA signal and a 100 mA, 12-volt remote wire with DC offset. It handles up to 55 watts (16 volts) of input, enabling robust performance with mid-range factory radios. The converter delivers accurate high-frequency detail and reliable remote turn-on, making it a practical choice for upgrading to an amplified system.
CT Sounds CT-LC2 2-Channel LOC with BassLift
The CT-LC2 provides a two-channel premium LOC with BassLift technology that restores bass roll-off common with factory head units. It features a main output for the speakers and a dedicated low-pass bass output for subwoofers, allowing a straightforward upgrade path to a paired amplifier and subwoofer setup. The BassLift feature aims to deliver fuller, more satisfying low-end without extra processing.
AudioControl LC2i PRO with AccuBASS and Remote
The LC2i PRO extends the LC2i line with AccuBASS and an optional dash remote knob for bass control. It converts speaker-level signals up to 400W per channel to high-quality pre-amp outputs for subs and amps. The PRO version focuses on enhanced processing and user control, making it suitable for installations where precise bass management and remote-tuning are priorities.
Elite Audio AccuBASS 2-Ch LOC Kit LC2iPro
The LC2iPro Kit combines a 2-channel LOC with an Oxygen Free RCA cable bundle for a cleaner installation. It is designed for straightforward upgrades: two input channels and two outputs, enabling effective front-stage improvement or subwoofer integration without discarding the factory head unit’s features. The kit emphasizes reliability and clean signal transfer for a simple, dependable path to better sound.
NVX XLCA2 X-Series 2-Channel LOC with xBOOST
The NVX XLCA2 is a high-power, two-channel LOC capable of handling speaker inputs up to 400 watts RMS. Its xBOOST technology enhances bass response with minimal distortion, while a selectable auto-on feature activates the unit only when the vehicle is in use. This combination supports efficient, powerful upgrades with reduced idle drain and enhanced low-end performance for a more engaging listening experience.
Buying Guide: Key Considerations For Active LOCs
Power handling and headroom: Look for LOCs that specify wattage per channel, matching your factory head unit’s output and planned amplifier input. Larger bass-heavy systems benefit from higher power ratings and robust dynamic range.
Bass restoration technologies: Features like AccuBASS or BassLift can compensate for factory bass roll-off, delivering fuller sound at higher listening levels. Consider whether you want automatic correction or manual control.
Output options: A good LOC provides multiple outputs (speaker-to-RCA, subwoofer outputs, and remote turn-on). Some models offer separate bass outputs or DC-offset remote connections for integration with amps and processors.
Remote control and tuning: Dash remotes or LED indicators help you fine-tune bass levels and monitor signal integrity. If you value on-the-fly adjustments, remote control features are beneficial.
Size and installation: Slim chassis with integrated mounting brackets simplifies installation in tight factory spaces. Check mounting depth and bracket compatibility for your dash or kick panel area.
System compatibility: Ensure the LOC can accept your vehicle’s speaker-level signals and integrate with your planned upgrade path (subwoofers, multi-channel amplifiers, or processors). Some LOCs also offer auto-on features and remote sensing for easier wiring.
Reliability and warranty: Choose models from brands with proven reliability and accessible warranties. A robust LOC can be a long-term component in your audio system.
Usage Scenarios And Comparative Perspectives
Factory radio with a planned sub upgrade: An LC2i or LC2i PRO is often a solid choice to reliably feed a dedicated sub amp while preserving OEM controls and features.
High-fidelity front stage plus sub: Models with BassLift or xBOOST provide enhanced bass performance without requiring extensive equalization, helping achieve a balanced front-to-back sound profile.
Limited space installations: Slim, compact LOCs with integrated mounting brackets offer straightforward installation in compact dashboards or tight glove-box areas.
Budget-friendly upgrades: Simple two-channel LOCs with essential features can deliver meaningful performance improvements while keeping installation accessible for first-time installers.