Kicker 46KISLOC2 K-Series Stereo Line-Output Converter w/Remote Turn-On Output
4.5Editor score
Converts speaker signal to RCA
Includes remote turn-on output
Accepts up to 55 watts input
In this guide
Finding the right line out converter subwoofer is essential for upgrading your factory car audio system without losing sound quality. These devices bridge the gap between high level speaker signals and low level RCA inputs required by aftermarket amplifiers. A good converter ensures your subwoofer receives clean power and accurate signal representation across all volume levels.
We evaluated ten leading models based on signal fidelity, installation flexibility, and additional features like bass control or remote turn on capabilities. Our analysis considers how each unit handles factory signal processing, noise rejection, and compatibility with modern vehicle electronics. This list covers everything from budget friendly solutions to premium audio processors.
Each pick highlights specific strengths such as built in bass restoration, adjustable gain, or compact chassis design for tight spaces. You will find detailed breakdowns of what makes each converter stand out for different vehicle types and audio goals. Please note that availability and specific pricing can change, so always verify current offers before purchasing.
Top 3 Picks for Best Line Out Converter Subwoofer
AudioControl LC2i 2-Channel Line Output Converter with AccuBASS for Adding Subwoofers, Amplifiers to Factory Car Audio Receiver Head Unit, Speaker Level to RCA Line Level Converter
4.6Editor score
AccuBASS restores factory bass roll-off
Handles up to 400 watts per channel
Includes optional remote level control input
SVS SoundPath Speaker Level Subwoofer Adapter, Home Audio Line Out Converter, Stereo RCA Output
4.3Editor score
24K gold-plated binding posts
Premium grade narrow-tolerance resistors
-30 dBV attenuation prevents power draw
Top 10 Best Line Out Converter Subwoofer in 2026 Compared
This side-by-side comparison reviews all ten selected line out converter subwoofer units to highlight their core specifications and unique capabilities for car audio integration.
ProductsSpecificationsEditor scorePrice
Best Budget
Kicker 46KISLOC2
55 watts input signal capacity
DC offset remote turn-on
Speaker to RCA conversion
Compact stereo line output
4.5Editor score
Editor's Choice
CT Sounds CT-LC2
2-channel premium line output
BassLift technology included
Full-range and low-pass output
34-page installation manual
4.4Editor score
Editor's Choice
Scosche LOC2SL
Remote control knob included
High to low RCA converter
Compact and durable design
Lifetime tech support backed
4.4Editor score
Skar Audio SKE2LOC
Active line output converter
Selectable turn-on options
Fully adjustable bass control
Remote level control included
4.5Editor score
NuIth Car Audio
Level gain adjustment included
Wire tap installation method
Clean sound signal output
Reliable bonding contact stability
4.4Editor score
AudioControl LC1i
400 watts per channel input
Load selection switches included
Ground isolation switch feature
Compact slim chassis design
4.7Editor score
Skar Audio SKAR2CH-LOC
Flat 20Hz to 20kHz range
60-ohm load per channel
8 volts RMS line output
Compatible with OEM radios
4.5Editor score
AudioControl LC2i
AccuBASS processing technology
400 watts per channel input
Remote level control input
Integrated mounting brackets
4.6Editor score
SVS SoundPath Adapter
24K gold-plated posts
Narrow-tolerance resistors used
Wide-trace PCBs included
-30 dBV attenuation feature
4.3Editor score
NVX XLCA2 X-Series
xBOOST bass technology included
400 watts RMS input
Remote bass control knob
9.5V pre-out output
4.5Editor score
1. Kicker 46KISLOC2 – Best Value Subwoofer Converter
Kicker 46KISLOC2
Accepts up to 55 watts input
DC offset remote wire output
Stereo line output converter
Sparkling highs and lows
The Kicker 46KISLOC2 is a highly rated budget friendly converter that delivers clean signal conversion for adding amplifiers to any factory radio. With a strong 4.5 rating from users, it stands out for its ability to maintain audio fidelity across all volume levels while keeping costs low for DIY enthusiasts.
Pros
- Affordable entry level price point
- Includes remote turn on wire
- Easy installation with speaker wires
- True sonic accuracy maintained
- Reliable K-Series build quality
Cons
- Limited to 55 watts input
- No remote level control knob
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout quality is the automatic conversion of speaker signals into RCA and a 100 milliamp remote turn on wire using DC offset technology. This means you do not need to install a separate remote wire from the battery. The unit accepts inputs up to 55 watts and preserves the full frequency range of your source audio.
While it handles common factory signal levels well, the 55 watt limit may be restrictive for high output factory systems that push more power. Additionally, it lacks an onboard volume knob for the subwoofer channel which some users prefer for fine tuning bass levels while driving.
This converter is ideal for budget conscious car audio owners who need a reliable solution to integrate a subwoofer amplifier without complex wiring. If your factory system is standard and you value simplicity and cost efficiency, the 46KISLOC2 is a solid and trusted choice for your upgrade.
Easy Remote Turn-On Integration
The DC offset technology eliminates the need for a separate remote wire by generating a 12 volt signal automatically when the radio turns on.
Preservation of Audio Fidelity
Despite the low cost, the converter ensures sparkling highs and thunderous lows are maintained without distortion at high volume levels.
We may earn a commission when you buy through this link, at no additional cost to you.
2. CT Sounds CT-LC2 – Best Bass Compensation Converter
CT Sounds CT-LC2
BassLift technology restores bass
Full-range and low-pass output
34-page product manual included
High to low signal conversion
The CT Sounds CT-LC2 is a premium line out converter designed specifically to combat the common issue of factory bass roll-off at higher volumes. With a 4.4 rating, it is praised for its BassLift technology which compensates for signal loss ensuring your subwoofer receives full range bass response even when the stereo volume is turned up.
Pros
- Restores factory bass roll-off
- Includes full range main output
- Detailed installation manual provided
- Premium build quality design
- Separate subwoofer bass output
Cons
- Higher price than budget units
- No onboard gain adjustment knob
We may earn a commission when you buy through this link, at no additional cost to you.
Key strengths include a dedicated low-pass bass output and a full-range main output for other speakers allowing flexible system configurations. The included 34-page manual offers step-by-step instructions making it accessible for installers who need clear guidance on wiring and signal flow.
One trade-off is that it does not include a remote gain knob so you may need to adjust bass levels directly at the amplifier. Also the price is higher than basic converters which might be a consideration if your factory system already retains bass well.
Buyers seeking a solution that actively restores missing bass frequencies will find this converter invaluable. It is particularly recommended for vehicles where the factory head unit applies aggressive bass reduction at high volumes and you want to recover that low end without digital processing.
BassLift Technology Benefit
This feature restores and compensates for factory bass roll-off ensuring consistent low frequency response across all volume settings.
Dual Output Flexibility
With separate main and subwoofer outputs you can route signals to different amplifiers or processors without signal degradation.
We may earn a commission when you buy through this link, at no additional cost to you.
3. Scosche LOC2SL – Best Remote Control Converter
Scosche LOC2SL
Remote control knob included
Compact and durable design
High to low RCA converter
Lifetime tech support backed
The Scosche LOC2SL is an editor's choice for those who want the convenience of adjusting subwoofer levels without leaving the driver's seat. It holds a strong 4.4 rating and distinguishes itself by including a dedicated remote control knob that connects directly to the unit for real-time bass adjustments.
Pros
- Included remote level control knob
- Compact design fits tight spaces
- Lifetime tech support available
- Reliable OEM quality signal
- Easy seamless integration
Cons
- Remote knob requires mounting space
- Limited to standard 2-channel
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout quality is the seamless integration capability which allows factory stereo signals to be converted to RCA without loss of sound quality. The compact and durable design ensures it fits easily into tight spaces under a dash or console while maintaining robust build standards expected from Scosche.
Users may find that the remote knob requires additional mounting space which can be a challenge in very minimal dash setups. Additionally while it works well for standard 2-channel setups it does not offer expanded channels for more complex multi-amp configurations.
This model is perfect for audiophiles who value control and convenience alongside sound quality. If you often need to dial in bass levels for different genres or passengers and you have space for the knob the LOC2SL is a reliable and trusted upgrade for your car audio.
Convenient Remote Level Control
The included knob allows you to adjust bass levels instantly from the dash ensuring optimal sound for any driving condition.
Compact Durable Build
Engineered for tight spaces this unit maintains high durability and OEM quality signal performance without taking up much room.
We may earn a commission when you buy through this link, at no additional cost to you.
4. Skar Audio SKE2LOC – Best Active Converter
Skar Audio SKE2LOC
Active line output converter
Fully adjustable bass control
Remote level control included
Wide frequency response range
The Skar Audio SKE2LOC is an active line output converter that offers significantly more control over signal shaping than standard passive units. With a 4.5 rating, it delivers high fidelity audio with adjustable bass and main channel controls that allow precise tuning of the subwoofer output directly at the unit.
Pros
- Active circuitry improves signal
- Adjustable bass and main control
- Multiple turn-on options available
- Wide frequency response range
- Remote level control included
Cons
- Higher cost than passive units
- Requires power connection
We may earn a commission when you buy through this link, at no additional cost to you.
Key strengths include selectable turn-on options such as DC offset, audio sense, or remote 12V giving installers flexibility based on vehicle wiring. The included remote level control further enhances convenience while the wide frequency response of 21Hz to 30kHz ensures full range audio reproduction without cutting off frequencies.
Because it is an active device it requires a power connection which adds a step to installation compared to passive converters. The higher price point also means it is a larger investment typically worth it only when full control and active signal processing are required.
This converter is best for users who demand precise signal adjustment and have a system that benefits from active line driving. If you want to tune both main and bass outputs independently and prefer versatile power on options the SKE2LOC provides professional level performance.
Active Signal Processing
Active circuitry ensures the signal is boosted and cleaned for better performance when feeding high gain amplifiers.
Flexible Turn-On Options
Multiple power on methods allow you to choose the most reliable trigger for your specific car audio system.
We may earn a commission when you buy through this link, at no additional cost to you.
5. NuIth Car Audio – Best Easy Install Converter
NuIth Car Audio
Level gain adjustment included
Wire tap installation method
Clean sound signal output
Reliable bonding contact stability
The NuIth Car Audio converter is designed for straightforward installation and clear sound conversion making it a practical choice for basic upgrades. With a 4.4 rating, users appreciate its level gain adjustment feature which allows you to lower bass output without pulling over to adjust the main amplifier settings.
Pros
- Simple level gain adjustment
- Easy wire tap installation
- Excellent sound output quality
- Stable bonding contact design
- Reasonable affordable price point
Cons
- No remote turn on feature
- Basic chassis design
We may earn a commission when you buy through this link, at no additional cost to you.
It functions by tapping into a speaker wire and converting the high voltage signal to a low-voltage RCA output. The neat power plug and stable bonding contacts ensure clean signal transmission without interference. Its simple design makes it a go-to for quick projects where advanced features are not needed.
The unit lacks a remote turn-on feature which may require additional wiring if your amplifier needs a remote trigger. The chassis is basic and does not offer the robust mounting options found in higher end models but it remains functional for most installations.
For owners who want an affordable and easy to use solution to add a subwoofer this model is an excellent pick. It delivers clean sound and practical level adjustment at a reasonable price point making it ideal for budget focused installers.
Level Gain Adjustment
Adjust the bass down without pulling over to manually adjust the amplifier ensuring convenient tuning while driving.
Stable Contact Design
Perfect bonding and contact stability provide clean and excellent sound without signal dropouts or interference.
We may earn a commission when you buy through this link, at no additional cost to you.
6. AudioControl LC1i – Best Premium Subwoofer Converter
AudioControl LC1i
400 watts per channel input
Ground isolation switch included
Load selection switches available
Compact slim chassis design
The AudioControl LC1i is a premium line out converter known for handling high power inputs and eliminating electrical noise in modern vehicles. With a 4.7 rating, it stands out for its ability to convert up to 400W per channel while maintaining a clean signal for downstream amplifiers and processors.
Pros
- Handles 400 watts per channel
- Removes ground buzz and noise
- Compatible with modern OEMs
- Optional remote knob available
- Built-in line driver
Cons
- Requires optional knob for remote
- Higher price for premium users
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout quality is the selectable ground isolation switch that allows you to remove ground buzz or alternator whine common in newer cars. Additionally load selection switches let you match the impedance of factory systems so you can keep factory speakers active without issues.
One limitation is that the remote dash knob is sold separately so you must buy extra hardware for level control. Also it is priced higher than standard converters which may be a barrier for casual DIYers not needing its advanced features.
This is the ideal choice for enthusiasts who need a robust solution that works seamlessly with modern factory electronics. If you value noise rejection and high power handling the LC1i delivers professional performance that justifies its cost.
Ground Isolation Feature
Select the ground isolation switch to eliminate alternator whine or ground buzz ensuring a clean silent audio background.
Factory Amplifier Compatibility
Onboard load selection switches allow factory amps to detect speaker loads and continue passing audio without issues.
We may earn a commission when you buy through this link, at no additional cost to you.
7. Skar Audio SKAR2CH-LOC – Best Flat Frequency Response
Skar Audio SKAR2CH-LOC
Flat 20Hz to 20kHz range
60-ohm load per channel
8 volts RMS line output
Compatible with OEM radios
The Skar Audio SKAR2CH-LOC is a reliable converter designed to maintain a flat frequency response across all volume levels ensuring accurate sound reproduction. With a 4.5 rating, it is praised for applying a 60-ohm load to each channel which helps circumvent open-circuit protection in sensitive factory amplifiers.
Pros
- Flat frequency response curve
- 60-ohm load circumvents protection
- High RMS line output voltage
- Works with smart radios
- Accepts up to 55 watts
Cons
- No remote turn on included
- Limited to basic conversion
We may earn a commission when you buy through this link, at no additional cost to you.
It delivers up to 8 volts RMS line output which provides a strong signal for driving high sensitivity amplifiers without noise. The unit is compatible with OEM aftermarket and smart radios making it a versatile option for a wide variety of vehicle makes and models.
It does not include a remote turn-on feature so you must rely on speaker signal sensing which may not work with all amplifier types. The design is basic and does not offer onboard gain adjustment which might limit fine tuning options for advanced users.
This converter is best for users who need a stable signal source with strong output voltage for their subwoofer setup. If you prioritize signal accuracy and compatibility with modern smart radios this unit offers consistent performance at a mid-range price point.
Flat Frequency Range
Maintains a flat 20Hz to 20kHz frequency range at all volume levels ensuring no tonal shift as you increase volume.
Circumvent Protection Feature
Apply a 60-ohm load to each channel to prevent factory amplifiers from shutting down due to open-circuit detection.
We may earn a commission when you buy through this link, at no additional cost to you.
8. AudioControl LC2i – Best High-Power Converter
AudioControl LC2i
AccuBASS processing technology
400 watts per channel input
Integrated mounting brackets
Optional remote level control
The AudioControl LC2i is a top-tier line converter that combines high power handling with AccuBASS technology to restore bass lost at high volumes. It holds a 4.6 rating and is designed to convert up to 400W per channel making it suitable for powerful factory systems and high gain aftermarket amplifiers.
Pros
- Restores factory volume roll-off
- Handles up to 400 watts
- Retains factory steering controls
- Compact slim chassis design
- Optional dash knob included
Cons
- No remote knob included
- Requires 12V fuse connection
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout feature is AccuBASS processing which corrects and restores bass roll-off ensuring your subwoofer performs consistently regardless of factory stereo volume. It also retains important factory features like volume and steering wheel controls ensuring you do not lose original convenience features during installation.
A trade-off is that it does not include a remote knob so you must purchase one separately or adjust at the amp. Additionally proper installation requires a direct 12V fuse connection for best performance which adds slight complexity to wiring.
This model is ideal for serious car audio enthusiasts who want maximum power handling and bass correction. If you drive a vehicle with aggressive bass roll-off and need to retain factory controls the LC2i provides a complete professional grade solution.
AccuBASS Technology
This technology corrects and restores bass roll-off when volume is increased on the factory radio maintaining full sound.
Factory Control Retention
Include the use of factory volume and steering wheel controls so you do not lose original convenience features.
We may earn a commission when you buy through this link, at no additional cost to you.
9. SVS SoundPath Adapter – Best Home Audio Quality
SVS SoundPath Adapter
24K gold-plated posts
Wide-trace PCBs included
-30 dBV attenuation feature
No loss of fidelity
The SVS SoundPath Speaker Level Subwoofer Adapter is a high fidelity solution designed for converting speaker level outputs to line level with no loss of audio quality. With a 4.3 rating it is built with premium grade components including narrow-tolerance resistors and wide-trace PCBs to handle high current and extreme power.
Pros
- 24K gold-plated posts
- Wide-trace PCBs ensure current
- No loss of fidelity design
- Premium narrow-tolerance resistors
- Secure RCA line output
Cons
- Home audio focused design
- Higher price point
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout quality is the 24K gold-plated binding posts and RCA jacks which ensure secure corrosion-free connections for reliable signal transmission. The -30 dBV attenuation ensures no power is drawn from the loudspeaker amplifier protecting both your amp and subwoofer from voltage issues.
This unit is designed more for home audio integrated amplifiers than car systems so it may not fit standard automotive mounting needs. The higher price reflects its premium construction and lack of automotive specific features like remote turn on which car users might expect.
For home audio enthusiasts adding a subwoofer to legacy components this adapter delivers excellent performance. If you prioritize pure signal fidelity and robust build quality over automotive specific convenience features this unit is a top tier choice.
Gold-Plated Connectivity
24K gold-plated binding posts and jacks ensure secure connections and high-quality signal transmission for your subwoofer.
Fidelity Preservation
Converts speaker level outputs to line level without any loss of fidelity ensuring pure and accurate audio reproduction.
We may earn a commission when you buy through this link, at no additional cost to you.
10. NVX XLCA2 – Best Digital Bass Enhancer
NVX XLCA2 X-Series
xBOOST bass technology included
400 watts RMS input
Remote bass control knob
9.5V pre-out output
The NVX XLCA2 X-Series is a line out converter designed to enhance low-end performance with its proprietary xBOOST technology. With a strong 4.5 rating it handles up to 400 watts RMS of input allowing for seamless integration with powerful amplifiers and complex car audio setups.
Pros
- xBOOST technology enhances bass
- Handles up to 400 watts
- Included remote bass knob
- Multiple output options available
- Selectible auto-on feature
Cons
- Complexity with multiple outputs
- No built-in level gain
We may earn a commission when you buy through this link, at no additional cost to you.
Its standout quality is the included remote bass knob which allows you to adjust levels directly from the dashboard for convenient tuning. The selectable auto-on feature ensures the unit activates only when the vehicle is in use saving battery power and optimizing efficiency.
The unit offers versatile output options including a 9.5V pre-out and 12V trigger out but this complexity might be overwhelming for simple installs. It also lacks a built-in level gain knob on the main unit forcing adjustments via the remote or amplifier.
This converter is ideal for users who want active bass enhancement and a remote control option in one package. If you need to integrate a powerful subwoofer and value flexibility for future expansions the XLCA2 provides solid performance and features.
xBOOST Technology
xBOOST optimizes bass response and provides a deep powerful bass experience with minimal distortion for your system.
Remote Bass Control
Adjust bass levels directly from the dashboard offering convenient control over your system's low-end output while driving.
We may earn a commission when you buy through this link, at no additional cost to you.
Buying Guide – How to Choose the Best Line Out Converter Subwoofer
Choosing the right converter requires evaluating how it handles signal conversion, power, and additional features like bass enhancement or remote control.
Signal Input Capacity
Check the maximum wattage or voltage the unit can handle before clipping. Standard factory speakers may need 55W or less but higher output systems need converters rated for 400W or more to avoid distortion.
Choose a model with higher capacity to ensure clean signal even if your factory system has an integrated amplifier.
Bass Restoration Technology
Many factory radios cut bass at high volumes to protect speakers. Look for units with AccuBASS or BassLift technology that restores this lost low end automatically as you increase volume.
This feature is critical if you notice your subwoofer sounds weak at high volumes compared to low volumes.
Remote Turn-On Options
Some converters generate a 12V remote wire from the signal (DC offset) while others need a manual wire. Select one that matches your amplifier's needs to avoid extra wiring steps.
Ensure the turn-on method is reliable for your specific amp to prevent startup issues or battery drain.
Output Voltage Levels
Higher output voltage (e.g., 8V RMS) helps drive high sensitivity amplifiers without noise. Verify the output rating to ensure it matches your subwoofer amplifier requirements for clean gain control.
Higher voltage outputs provide more headroom and cleaner signals for demanding audio systems.
Mounting and Size
Ensure the unit is compact enough to fit under your dash or console without interfering with airbags or other components. Look for models with integrated mounting brackets if space is tight.
A slim chassis ensures easy installation and reduces clutter in your vehicle's wiring.
Ground Isolation Features
In modern vehicles ground loops can cause alternator whine or buzz. Look for converters with a ground isolation switch to remove electrical noise from the signal path.
This feature is essential for noise-free audio in cars with complex electrical systems.
Bass Control and Remote
Units with included remote knobs allow you to adjust subwoofer volume while driving. This adds convenience compared to manually adjusting the amplifier knob.
Consider if you need a remote knob or prefer to adjust bass directly at the amp.
Build Quality and Warranty
Choose reputable brands that offer tech support and warranties. Higher quality components like gold-plated connectors and PCBs ensure longer life and better signal transmission.
A reliable warranty and support help resolve installation issues or defects quickly.
How to Use and Care for Your Line Out Converter Subwoofer
Begin by locating a pair of speaker wires at your factory radio or rear deck that have audio signal. Connect the input leads of the converter to these wires using tap connectors ensuring you match polarity for correct signal routing.
Next run the RCA output cables from the converter to your subwoofer amplifier input. Connect the remote turn-on wire if included or wire the DC offset output to your amp's remote terminal to ensure it powers on with your stereo.
Finally set your amplifier gains carefully starting with the converter gain at midpoint. Test the system at various volumes to ensure no noise is present and adjust bass settings using any included remote knobs or on-board controls.
Frequently Asked Questions
What is a line out converter for a subwoofer?
A line out converter for a subwoofer changes the high voltage speaker signal from your factory radio into a low voltage RCA signal. This allows you to connect aftermarket amplifiers and subwoofers to stock head units that lack preamp outputs.
Do I need a converter for factory speakers?
Yes if your car has factory speakers and you want to add a subwoofer amplifier you need a converter. Without one the high voltage speaker signal would damage the RCA inputs on your amplifier or produce poor sound quality.
What is AccuBASS technology?
AccuBASS is a feature in premium converters that restores bass lost at higher volumes. Factory radios often cut bass to protect speakers so this tech adds it back automatically ensuring full low-end performance at any volume.
Can I use a line out converter for home audio?
Yes there are adapters designed specifically for home audio that convert speaker level outputs to RCA. Ensure the unit is rated for the power levels of your home amplifier to maintain sound quality and safety.
Why is my subwoofer humming after installation?
A hum usually indicates a ground loop or poor signal shielding. Use a converter with a ground isolation switch to filter noise and ensure all grounds are connected securely to clean the audio path.
How do I know which wires to tap?
Use a multimeter to test wires for constant or switched power and audio signals. Tap into speaker wires that carry audio signals from front speakers to ensure your subwoofer responds to the full audio range.
Do I need a remote wire if I use a DC offset converter?
No DC offset converters generate a remote signal automatically when the radio detects audio. This eliminates the need to run a separate 12V wire from the battery to the amplifier for power on control.
What happens if I exceed the wattage rating?
Exceeding the wattage rating can cause the converter to distort or clip the signal. This results in poor sound quality and may potentially damage connected components. Always choose a model with a higher power rating than needed.
Final Thoughts on Choosing the Best Line Out Converter Subwoofer
Selecting the right line out converter subwoofer depends on your vehicle's factory system and your audio goals. The Kicker 46KISLOC2 offers budget value while the AudioControl LC2i brings premium features like AccuBASS for high power setups.
Prioritize units with bass restoration and ground isolation if you face factory bass roll-off or electrical noise. A converter with remote control capabilities adds convenience for tuning bass while driving without stopping.
Always verify current product offers and availability before purchasing as models and stock can change. With the right converter your subwoofer setup will integrate seamlessly with your factory system for clean powerful sound.