Kicker 46KISLOC2 K-Series Stereo Line-Output Converter w/Remote Turn-On Output
4.5Editor score
Automatically converts speaker signal
Includes remote turn-on output
Accepts up to 55 watts
In this guide
Finding the right Line Out Converter Subwoofer is essential for upgrading your factory stereo to aftermarket amplifiers. These devices transform speaker-level signals into low-level RCA outputs, ensuring compatibility without complex rewiring or signal loss.
We evaluated ten leading models based on signal fidelity, build quality, ease of installation, and additional features like bass control. Our analysis covers budget options and premium units designed for modern vehicle audio systems.
Each pick highlights key strengths and ideal use cases for different budgets. Prices and availability fluctuate frequently, so check current listings before purchasing to ensure you get the best value for your specific needs.
Top 3 Picks for Best Line Out Converter Subwoofer
AudioControl LC2i 2-Channel Line Output Converter with AccuBASS
4.6Editor score
AccuBASS restores factory bass
Handles up to 400 watts
Includes optional remote knob
SVS SoundPath Speaker Level Subwoofer Adapter, Home Audio Line Out Converter, Stereo RCA Output
4.3Editor score
No loss of fidelity
24K gold-plated connectors
-30 dBV attenuation
Top 10 Best Line Out Converter Subwoofer in 2026 Compared
This side-by-side comparison breaks down the specifications of the top ten Line Out Converter Subwoofer units available in October 2026. Compare inputs, outputs, power handling, and special features to find the perfect match for your setup.
ProductsSpecificationsEditor scorePrice
Best Budget
Kicker 46KISLOC2
Input Signal 55 Watts
Output RCA 2 Channel
Remote Turn-On Included
Passive Conversion
4.5Editor score
Editor's Choice
CT Sounds CT-LC2
BassLift Technology
Full-Range Main Output
Low-Pass Bass Output
34-Page Manual
4.4Editor score
Best Premium
Scosche LOC2SL
Remote Control Knob
Compatible With OEM
Compact Durable Design
Lifetime Tech Support
4.4Editor score
Skar Audio SKE2LOC
Selectable Turn-On Options
Adjustable Bass Control
Remote Level Control
Active Conversion
4.5Editor score
NuIth Car Audio
Level Gain Adjustment
Signal Sensing Relay
2 Channel Output
Simple Installation
4.4Editor score
AudioControl LC1i
400 Watts Handling
Load Selection Switches
Ground Isolation Switch
Slim Chassis Design
4.7Editor score
Skar Audio SKAR2CH-LOC
55 Watts Input
20Hz to 20kHz Range
60-ohm Load Applied
8 Volts RMS
4.5Editor score
AudioControl LC2i
400 Watts Per Channel
AccuBASS Technology
Integrated Mounting Brackets
Steering Wheel Controls
4.6Editor score
SVS SoundPath
Stereo 24K Gold Plated
High Current Handling
-30 dBV Attenuation
Narrow Tolerance Resistors
4.3Editor score
NVX XLCA2
400 Watts RMS
xBOOST Technology
Selectable Auto-On
Remote Bass Control
4.5Editor score
1. Kicker 46KISLOC2 – Best Budget Line Out Converter Subwoofer
Kicker 46KISLOC2
Input Up to 55 Watts
DC Offset Remote Turn-On
Speaker to RCA Conversion
Compact Black Housing
The Kicker 46KISLOC2 is a reliable entry-level Line Out Converter Subwoofer for basic installations. It holds a 4.5-star rating due to its simplicity and ability to handle 55 watts of input signal effectively.
Pros
- Affordable price point
- Built-in remote turn-on wire
- Simple plug-and-play wiring
- High input voltage capacity
Cons
- Passive conversion limits output
- No level adjustments
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It converts factory speaker wire directly into an RCA signal while simultaneously generating a 100 milli-amp remote turn-on signal. This eliminates the need for a separate remote wire, saving time and materials during installation.
While it lacks adjustable controls, this passive design ensures signal integrity without complex electronics. It is best for users needing a straightforward solution to bridge a factory radio to an aftermarket subwoofer amplifier.
If you want a cost-effective way to add bass without custom tuning, this Kicker unit delivers true sonic accuracy. It fits easily into tight spaces and maintains the original audio quality of your vehicle.
Remote Turn-On Convenience
This unit automatically detects DC offset from speaker wires to trigger your amplifier, removing the need for extra wiring.
High Voltage Handling
Accepting up to 16 volts ensures compatibility with various factory radios without risking signal distortion or hardware damage.
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2. CT Sounds CT-LC2 – Versatile Line Out Converter Subwoofer
CT Sounds CT-LC2
BassLift Technology
Full-Range and Low-Pass Output
Factory Bass Roll-Off Restore
2-Channel Premium Design
The CT Sounds CT-LC2 is designed to enhance low-frequency performance with its unique BassLift technology. With a 4.4-star rating, it addresses common issues where factory bass rolls off at higher volumes.
Pros
- Includes BassLift Technology
- Full-range output for speakers
- Low-pass output for subs
- Comprehensive installation manual
Cons
- Higher price than basic units
- Requires careful setup
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It provides two distinct outputs: a full-range main signal for door speakers and a low-pass bass signal specifically for subwoofers. This separation allows for more precise audio tuning and integration.
The unit restores factory bass roll-off by compensating for signal loss during conversion. This ensures that bass frequencies remain powerful even when the radio volume is increased significantly.
Choose this model if your factory system suffers from weak bass response. The included manual provides step-by-step guidance to help you achieve a balanced audio setup without professional tools.
BassLift Technology
This feature restores lost bass frequencies by compensating for factory roll-off, ensuring powerful low-end at all volume levels.
Dual Output Design
Separate full-range and low-pass outputs allow you to connect both speakers and subwoofers with correct signal types.
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3. Scosche LOC2SL – Line Out Converter Subwoofer with Knob
Scosche LOC2SL
Remote Control Knob Included
OEM RCA Converter
Lifetime Tech Support
Compact Durable Design
The Scosche LOC2SL distinguishes itself with a remote control knob included for adjusting bass levels directly from the dashboard. It maintains a 4.4-star rating by delivering crisp sound without losing quality during signal conversion.
Pros
- Integrated remote level control
- Wide system compatibility
- OEM quality construction
- Lifetime technical support
Cons
- Bass knob wire may need extension
- Basic passive conversion
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Designed for seamless integration, it allows you to connect aftermarket amplifiers using existing factory speaker wires. The unit minimizes interference to ensure powerful sound suitable for high-fidelity setups.
Its compact design fits easily into tight spaces behind dashboards or trunks. The durable build ensures reliability, backed by Scosche's lifetime tech support for any installation questions you might have.
This converter is ideal for audiophiles who want easy volume adjustments without leaving the seat. It balances quality and convenience effectively for most standard car audio configurations.
Remote Level Control
The included remote knob allows you to adjust subwoofer levels instantly without pulling over or reaching into the trunk.
OEM Signal Quality
Designed as an OEM-quality converter, it preserves the original audio fidelity while converting signals for aftermarket use.
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4. Skar Audio SKE2LOC – Active Line Out Converter Subwoofer
Skar Audio SKE2LOC
Active Conversion Circuitry
Selectable Turn-On Options
Adjustable Bass Control
Frequency Response 21Hz to 30kHz
The Skar Audio SKE2LOC is an active Line Out Converter Subwoofer that ensures strong signal levels for amplifiers. It achieves a 4.5-star rating thanks to its flexible turn-on options and detailed audio control features.
Pros
- Active line output design
- Multiple turn-on methods
- Adjustable bass and main control
- Wide frequency response
Cons
- Requires power connection
- Slightly higher cost
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It offers selectable turn-on methods including DC offset signal sense and audio sense, giving installers versatility. The remote 12V output ensures reliable activation of downstream equipment.
With fully adjustable bass and main channel controls, you can fine-tune the output to match your amplifier settings. The frequency response of 21Hz to 30kHz covers the full audio spectrum effectively.
Choose this active unit if you need robust signal drive for high-performance systems. The remote level control included allows precise adjustments from your seat.
Active Circuitry Benefits
Active conversion ensures strong signal levels that prevent weak inputs from affecting amplifier performance or headroom.
Flexible Turn-On
Multiple turn-on options like DC offset and remote 12V input give installers flexibility depending on the vehicle.
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5. NuIth Car Audio – Affordable Line Out Converter Subwoofer
NuIth Car Audio
Level Gain Adjustment
Speaker Level to RCA
Signal Sensing Relay
Neat Power Plug Design
The NuIth Car Audio converter is a budget-friendly Line Out Converter Subwoofer designed for easy installation. With a 4.4-star rating, it allows users to add subwoofers to stock stereos without technical expertise.
Pros
- Level gain adjustment
- Simple wiring setup
- Affordable pricing
- Reliable signal bonding
Cons
- Basic build quality
- Limited advanced features
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It includes a level gain adjustment to lower bass output without pulling over, enhancing safety and convenience. The high-to-low conversion ensures your amplifier receives the correct low-voltage signal.
The design features a neat power plug with stable bonding and contact, which minimizes interference. It acts as a relay that turns on when the radio is active, saving battery power.
This unit is perfect for quick upgrades where cost and simplicity are priorities. It provides clean sound and reliable connection for standard car audio setups.
Level Gain Control
Adjust the bass level directly with the gain knob to match your preferences without adjusting the amplifier physically.
Signal Relay System
The internal relay detects the speaker signal to automatically power the converter, ensuring energy efficiency.
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6. AudioControl LC1i – Best Premium Line Out Converter Subwoofer
AudioControl LC1i
Handles up to 400 Watts
Line Driver Included
Ground Isolation Switch
Slim Chassis Dimensions
The AudioControl LC1i is an exceptional Line Out Converter Subwoofer offering high-end signal processing. Its 4.7-star rating reflects its ability to convert up to 400W of speaker-level signals into clean pre-amp outputs.
Pros
- Superior sound quality
- Selectable load switches
- Ground isolation for noise
- Compact form factor
Cons
- Higher price point
- Optional remote sold separately
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It features onboard load selection switches that allow factory amplifiers in modern vehicles to detect speaker loads correctly. This prevents the vehicle from entering protect mode during installation.
A built-in line driver provides optimum signals for downstream amplifiers, while a ground isolation switch eliminates alternator whine. The slim chassis fits in tight spaces with mounting options.
Select this unit for the highest fidelity and flexibility. It balances performance and convenience better than most competitors in the market.
Advanced Signal Processing
The line driver boosts signal quality, ensuring your amplifier receives a strong, distortion-free input for best results.
Modern Vehicle Compatibility
Load selection switches prevent factory amps from triggering error codes when replacing speakers with aftermarket gear.
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7. Skar Audio SKAR2CH-LOC – Reliable Line Out Converter Subwoofer
Skar Audio SKAR2CH-LOC
Flat Frequency Range
60-ohm Load
Accepts Up to 55 Watts
RCA Outputs Up to 8 Volts
The Skar Audio SKAR2CH-LOC offers a reliable Line Out Converter Subwoofer for budget-conscious users seeking quality. It carries a 4.5-star rating for its flat frequency response and ability to handle 55 watts of input signal consistently.
Pros
- Flat response at all volumes
- High output voltage
- Open-circuit protection
- Affordable pricing
Cons
- Basic feature set
- No remote controls
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It applies a 60-ohm load to each channel to circumvent open-circuit protection in factory radios. This prevents the vehicle's audio system from cutting out when speakers are disconnected for wiring.
The unit outputs up to 8 Volts RMS, providing strong signal levels for aftermarket amplifiers. The frequency range of 20Hz to 20kHz ensures full-spectrum audio without distortion.
Choose this if you need a straightforward, dependable converter without extra knobs. It delivers clean performance and robust protection for your audio components.
Open-Circuit Protection
The 60-ohm load ensures factory radios stay active even when original speakers are disconnected during installation.
High RMS Output
Outputting up to 8 Volts RMS provides strong signal levels to drive sensitive amplifiers efficiently.
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8. AudioControl LC2i – Premium Line Out Converter Subwoofer
AudioControl LC2i
400 Watts Per Channel
AccuBASS Technology
Optional Dash Knob Remote
Integrated Mounting Brackets
The AudioControl LC2i is a top-tier Line Out Converter Subwoofer offering advanced signal correction features. With a 4.6-star rating, it combines 400W handling with AccuBASS processing to correct factory bass roll-off.
Pros
- AccuBASS restores bass
- High power handling
- Retains factory features
- Remote included options
Cons
- Premium pricing
- Fader control limited on some setups
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It retains important factory features like volume and steering wheel controls while enabling aftermarket connections. Integrated mounting brackets make installation quick without taking up extra room.
The AccuBASS technology corrects signal loss at higher volumes, ensuring bass remains tight and controlled. It also offers variable outputs with discrete level controls for customization.
Choose this premium unit for the best audio fidelity and flexibility. It is perfect for high-end systems where precision tuning is critical for performance.
AccuBASS Restoration
AccuBASS corrects and restores bass roll-off when volume increases, ensuring consistent low-end power at all levels.
Factory Feature Retention
This unit keeps steering wheel controls and volume knobs working perfectly, so you never lose essential functions.
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9. SVS SoundPath – High-Fidelity Line Out Converter Subwoofer
SVS SoundPath
24K Gold-Plated Posts
-30 dBV Attenuation
Premium Grade Resistors
No Power Draw
The SVS SoundPath is a specialized Line Out Converter Subwoofer designed for home audio and high-fidelity setups. It holds a 4.3-star rating for its ability to convert speaker-level outputs to line-level RCA without losing fidelity.
Pros
- Lossless fidelity
- Gold-plated connections
- High power handling
- No power consumption
Cons
- Not designed for cars
- Expensive for basic use
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It features 24K gold-plated binding posts and wide-trace PCBs designed for high-current and extreme power handling. The -30 dBV attenuation ensures no power is drawn from the loudspeaker amplifier during conversion.
Premium-grade resistors ensure precise signal attenuation. This model is ideal for legacy integrated amplifiers that need subwoofer connections but lack pre-outs.
Choose this for audiophile-grade performance where quality is paramount. It ensures clean, powerful sound with minimal interference.
Gold-Plated Connectivity
Stereo 24K gold-plated output jacks ensure secure connections and minimal signal loss over time.
Power-Free Attenuation
-30 dBV attenuation ensures no power is drawn from the amplifier, maintaining system efficiency.
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10. NVX XLCA2 – Digital Bass Enhancer Line Out Converter Subwoofer
NVX XLCA2
xBOOST Bass Technology
Handles up to 400 Watts
Selectable Auto-On
Remote Bass Control
The NVX XLCA2 is a feature-rich Line Out Converter Subwoofer that combines conversion with digital bass enhancement. Its 4.5-star rating reflects its xBOOST technology and high-power handling of 400 watts RMS.
Pros
- Bass enhancement feature
- Efficient power management
- Strong signal output
- Remote control included
Cons
- Limited digital features
- Higher price than basic
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It includes a remote bass knob to adjust low-end output directly from the dashboard. Selectable Auto-On ensures efficiency by only activating when the vehicle is in use.
The unit provides versatile outputs including a 12V trigger out and dual amplifier outputs. This flexibility makes it suitable for complex setups with multiple devices.
Select this model if you want enhanced bass control in one unit. It balances performance and practicality for demanding audio systems.
xBOOST Bass Enhancement
xBOOST technology optimizes low-end performance, providing a deep and powerful bass experience with minimal distortion.
Remote Bass Control
The included remote knob lets you adjust bass levels while driving, offering convenient control over your system.
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Buying Guide – How to Choose the Best Line Out Converter Subwoofer
Selecting the right Line Out Converter Subwoofer depends on your vehicle's audio architecture and your desired sound quality. This guide outlines the critical factors to consider for a successful upgrade.
Signal Type Conversion
Passive converters rely on voltage reduction and are simple to install. Active converters include amplifiers that boost signals, which is better for factory systems with high resistance.
Choose active units for vehicles with built-in amplifiers to avoid weak signal output.
Power Handling
Ensure the converter can handle the input power from your factory speakers without distortion. Most modern units support between 55W and 400W.
Match the converter's wattage to your amplifier's requirements for optimal performance.
Bass Adjustment Features
Units with remote knobs or onboard controls allow you to fine-tune bass levels. This is crucial if you want to adjust bass without accessing the amplifier.
Look for models with remote turn-on options to simplify wiring.
Factory Amplifier Compatibility
Many modern vehicles have factory amplifiers. Some converters have load switches to detect speaker loads and prevent error codes.
Verify that the converter supports load selection to avoid triggering vehicle error modes.
Mounting and Size
Space under the dash or in the trunk is often limited. Slim chassis designs are preferred to ensure a clean installation.
Check dimensions to ensure the unit fits your vehicle's specific mounting areas.
Cable Lengths
Short internal wires may require extensions to reach the subwoofer or amplifier. Quality shielding prevents noise and interference.
Verify the length of included cables to avoid extra purchases during installation.
Build Quality and Warranty
Reputable brands offer better durability and support. Check for warranties and lifetime tech support to ensure long-term reliability.
Invest in high-quality units to prevent electrical failures over time.
Frequency Response
A flat frequency response ensures accurate sound reproduction. Look for units covering 20Hz to 20kHz for full-range audio.
Prioritize units with wide frequency response for the best audio quality.
How to Use and Care for Your Line Out Converter Subwoofer
Start by identifying the positive and negative speaker wires from your factory radio. Use a multimeter to confirm which wires are active when the radio is playing music.
Connect the speaker wires to the input terminals on the converter. Ensure tight connections to prevent noise or signal loss during operation.
Route the RCA cables to your amplifier and connect the power wire. Secure all wires away from moving parts and keep them away from heat sources.
Frequently Asked Questions
Do I need a Line Out Converter for all factory radios?
You need a converter only if your factory radio lacks RCA outputs. If your head unit already has subwoofer or RCA outputs, you can connect your amplifier directly without one.
Can a Line Out Converter damage my factory radio?
No, high-quality converters are designed to prevent damage. They isolate circuits and handle voltage safely, ensuring your vehicle's electrical system remains unaffected.
What is the difference between passive and active converters?
Passive converters reduce voltage using resistors. Active converters include an amplifier stage to boost signal levels, which is necessary for systems with built-in factory amplifiers.
Will installing a converter void my car's warranty?
In most regions, installing aftermarket audio equipment does not void warranties unless it directly causes electrical damage. Check your vehicle's warranty terms for specific exclusions.
How do I choose the right converter for my car?
Check your car's manual for factory amp details. If you have an amp, choose a unit with load switches. Otherwise, a standard passive unit is sufficient for basic setups.
Do Line Out Converters improve sound quality?
They enable proper signal transfer which improves sound. A good converter preserves audio fidelity while reducing noise that can occur with direct wiring.
Final Thoughts on Choosing the Best Line Out Converter Subwoofer
We reviewed ten top Line Out Converter Subwoofer models ranging from budget-friendly options to premium units with advanced features.
Prioritize units that support your vehicle's specific wiring architecture. Active converters offer better performance for complex systems.
Prices vary significantly based on features. Always check current pricing to ensure you are getting the best value for your upgrade.