Best Audio Line-Out Converters for Aftermarket Car Audio Upgrades
The best audio line-out converter choices turn factory speaker signals into clean RCA or low-level outputs for amplifiers. This guide highlights top options that suit different buyers: casual installers enhancing existing systems, hobbyists upgrading for better subwoofer performance, and those seeking easy, no-wuss wiring solutions. Below, you’ll see who each product is best for, plus a quick comparison table to help you pick fast.
| Product | Best For | Key Benefit |
|---|---|---|
| Kicker 46KISLOC2 | DIYers seeking factory-to-RCA with remote turn-on | Automatic DC-offset conversion with 100 mA remote wire |
| Scosche LOC80 | Boosting sound with minimal wiring | Versatile high-to-low conversion for many systems |
| CT Sounds CT-LC2 | Bass-focused setups needing BassLift | Two outputs: main (full-range) and subwoofer (low-pass) |
| NuIth | Stock or aftermarket systems adding amps | User-adjustable gain for bass control |
| Scosche LOC2SL | Simple install with remote control feel | Line-out converter with remote knob option |
Kicker 46KISLOC2 K-Series Stereo Line-Output Converter
- Converts factory speaker wires to RCA signal and provides a 12-volt remote wire.
- Accepts up to 55 watts (16 volts) input signal.
- Designed for adding an amplifier to nearly any radio with accurate sound at any volume.
Best for: Do-it-yourself installers who want true sonic accuracy at any volume and a simple remote turn-on feature. Limitations: May require a separate RCA harness for some vehicles.
Scosche LOC80 Line Output Converter
- 2-channel high-to-low RCA converter suitable for subwoofer amps.
- Offers versatile installation options and seamless integration with factory or aftermarket systems.
- Delivers crisp sound and helps boost audio performance without rewiring.
Best for: Those upgrading stock radios with a dedicated subwoofer or amplifier. Limitation: Some vehicles may need additional mounting hardware for clean routing.
CT Sounds CT-LC2 2-Channel Premium Line-Out Converter
- Two outputs: full-range main and low-pass bass for subwoofers.
- BassLift technology restores factory bass roll-off for fuller sound.
Best for: Audiophiles seeking improved bass response with a straightforward two-channel setup. Limitation: BassLift performance depends on compatible factory bass output.
NuIth Car Audio Speaker Wire to RCA Converter
- Converts speaker wire output to RCA outputs to add amplifiers or subs.
- Includes a gain adjustment to tailor bass without stopping to re-tune on the road.
Best for: Systems where a simple, adjustable gain path is needed to integrate an amplifier. Limitation: Requires correct gauge wiring and safe mounting in tight dash spaces.
Scosche LOC2SL Line Output Converter With Remote Control Knob
- 2-channel high-to-low RCA converter with optional remote knob.
- Designed for easy installation with broad compatibility across OEM and aftermarket radios.
Best for: Quick, user-friendly installations where a monitorable remote level control is desired. Limitation: Remote knob option may be unused in some installs if space is limited.
PAC SNI-35 Variable LOC Line Out Converter
- Adjustable line output converter with audio transformer for noise isolation.
- Converts speaker-level outputs to RCA input for amplifiers.
Best for: Users needing adjustable line level with noise isolation in noisy vehicle environments. Limitation: Slightly more setup complexity due to variable settings.
Skar Audio SKAR2CH-LOC
- 2-channel line-out converter compatible with OEM and aftermarket radios.
- Handles up to 55 watts input and provides flat 20 Hz – 20 kHz range at all volumes.
Best for: Those who need reliable performance across a wide frequency range. Limitation: Compatibility should be verified with your specific head unit and amp.
Buying Guide
Key considerations when selecting a line-out converter include signal input range, number of channels, and whether you need bass-specific outputs. If your goal is subwoofer performance, look for a model with a dedicated bass or low-pass output. For factory radios with limited space, a compact solution and remote control options can simplify installation.
- How many channels do you need? Choose 2-channel units for a single amplifier or 4-channel units if you plan to run multiple amps or full-range uses.
- Do you require a bass-focused output? BassLift or low-pass options help restore factory bass signals for subwoofers.
- Is remote turn-on or remote volume control important? Some models include a 12-volt remote wire or a remote knob for on-the-fly adjustments.
- What is your installation environment? Noise isolation and transformer-based designs can improve performance in noisy cars.
- Compatibility with OEM and aftermarket radios: Some units are designed to integrate with factory radios without rewiring, others assume aftermarket head units.
FAQ
- What does a line-out converter do? It converts speaker-level outputs to RCA or line-level signals to drive amplifiers or subs.
- Is BassLift necessary for all cars? Not always, but it helps restore bass that factory radios often roll off at higher volumes.
- Can I install these myself? Yes, most models are designed for straightforward installation, though some vehicles may require additional adapters.
- Do I need a remote turn-on wire? If your amplifier requires a remote signal, choose a converter that provides a remote output.
- Will a converter impact my existing head unit’s sound quality? A well-designed converter should preserve fidelity; poor isolation can introduce noise.
- How do I choose between two similar units? Compare outputs (main vs low-pass), gain adjustment, remote options, and how each fits your vehicle’s wiring.