Kicker 46KISLOC2 K-Series Stereo Line-Output Converter
4.5Editor score
Converts speaker signal to RCA
Includes remote turn-on output
Up to 55 watts input
In this guide
Adding a subwoofer to your car audio system often requires a line out converter to bridge the gap between factory speakers and aftermarket amplifiers. These devices ensure signal integrity and prevent audio loss during conversion. Choosing the right converter can significantly enhance your listening experience without complex wiring.
We have evaluated ten top-rated line out converters based on signal quality, ease of installation, and feature sets like remote controls and bass adjustment. Each product was reviewed for compatibility with various car stereo systems and its ability to handle high input signals without distortion or noise interference.
Each pick in this list highlights specific strengths such as budget-friendly pricing, premium features like AccuBASS, or compact designs for tight spaces. Please note that product availability and pricing can change frequently, so verify current details before making your final purchase decision online.
Top 3 Picks for Best Line Out Converter Subwoofer
AudioControl LC2i 2-Channel Line Output Converter
4.6Editor score
AccuBASS restoration technology
Handles 400 watts per channel
Compact slim chassis design
SVS SoundPath Speaker Level Subwoofer Adapter
4.3Editor score
24K gold-plated binding posts
Narrow-tolerance resistors
No loss of fidelity
Top 10 Best Line Out Converter Subwoofer in 2026 Compared
The following table provides a side-by-side comparison of all ten products featured in this guide. It highlights key specifications such as input voltage, frequency response, and special features to help you quickly identify which converter suits your specific audio setup needs.
ProductsSpecificationsEditor scorePrice
Best Budget
Kicker 46KISLOC2
Input Signal Up to 55 Watts
Remote Turn-On Output Included
Stereo Line-Output Conversion
DC Offset Technology Used
4.5Editor score
Editor's Choice
CT Sounds CT-LC2
BassLift Technology Included
Full-Range Main Output
Low-Pass Bass Output
High-Level to Low-Level Signal
4.4Editor score
Best Premium
Scosche LOC2SL
Remote Control Knob Included
High to Low Converter
Compact and Durable Design
OEM Quality Signal Path
4.4Editor score
Skar Audio SKE2LOC
2-Channel Active Converter
Adjustable Bass Control
Select Turn-On Options
Remote Level Control Included
4.5Editor score
NuIth Car Audio
Speaker Wire to RCA
Level Gain Adjustment
Easy Installation Process
Clean Sound Quality
4.4Editor score
AudioControl LC1i
Input Up to 400 Watts
Load Selection Switches
Built-in Line Driver
Ground Isolation Switch
4.7Editor score
Skar Audio SKAR2CH-LOC
Accepts 55 Watts Input
Flat 20Hz to 20kHz
60-ohm Load Applied
RCA Outputs to 8 Volts
4.5Editor score
AudioControl LC2i
AccuBASS Processing
Input Up to 400 Watts
Compact Slim Chassis
Remote Input for ACR-1
4.6Editor score
SVS SoundPath
24K Gold-Plated
30 dBV Attenuation
5-way Binding Posts
Wide-Trace PCBs
4.3Editor score
NVX XLCA2
Handles 400 Watts RMS
xBOOST Technology Included
Selectable Auto-On
Remote Bass Control
4.5Editor score
1. Kicker 46KISLOC2 – Best Budget Line Out Converter Subwoofer
Kicker 46KISLOC2
Up to 55 watts input
100 milli-amp remote
Stereo line-output conversion
DC offset technology
The Kicker 46KISLOC2 stands out as an excellent entry-level option for those looking to add a subwoofer without breaking the bank. With a solid 4.5-star rating, this converter delivers true sonic accuracy at any volume level, ensuring your original audio remains crisp and clear.
Pros
- Affordable price point
- Simple installation process
- Includes remote turn-on
- High signal accuracy
- Compact size
Cons
- Basic features only
- No bass adjustment
We may earn a commission when you buy through this link, at no additional cost to you.
It uses your factory speaker wires to convert the signal into an RCA output and a 100 milli-amp remote turn-on wire. This eliminates the need for extra wiring harnesses. It accepts up to 55 watts of input signal, making it compatible with most factory head units.
While it lacks advanced features like bass controls, it performs its core function reliably. The trade-off is a lack of fine-tuning options, but for budget-conscious users, the seamless integration and reliable performance make it a worthy choice.
This unit is ideal for users who need a straightforward solution to connect an amplifier. It is recommended for those who prioritize affordability and reliability over advanced audio adjustments.
Seamless Factory Integration
The innovative design automatically converts speaker signals without requiring complex rewiring or additional harnesses for most setups.
Reliable Remote Output
The powerful 12-volt remote wire ensures your amplifier turns on and off with your radio system effortlessly.
We may earn a commission when you buy through this link, at no additional cost to you.
2. CT Sounds CT-LC2 – Reliable BassLift Line Out Converter
CT Sounds CT-LC2
2-Channel Premium
BassLift Technology
Full-Range Main Output
Low-Pass Bass Output
The CT Sounds CT-LC2 is designed for enthusiasts who want more control over their bass response. It features BassLift technology to compensate for factory bass roll-off, which often occurs at higher volumes in stock systems.
Pros
- Restores factory bass roll-off
- High and low outputs
- Detailed installation manual
- Full-range main output
- Premium build quality
Cons
- Higher cost than basic
- No remote knob
We may earn a commission when you buy through this link, at no additional cost to you.
This unit provides both a Full-Range Main Output and a Low-Pass Bass Output, giving you flexibility in how you route your signal. It converts high-level speaker signals into low-level RCA inputs, preserving sound quality throughout the chain.
A major plus is the included 34-page manual, which simplifies installation significantly. However, it lacks a remote bass knob, which might be a downside for users who want dashboard control over their subwoofer levels.
This converter is best suited for those who value sound restoration and clear separation between main and bass signals. It is a strong choice for mid-range audio upgrades.
BassLift Technology
This feature actively restores/compensates for factory bass roll-off, ensuring deep lows are present even at high volumes.
Comprehensive Installation Support
The included 34-page product manual provides step-by-step instructions to guide you through the process clearly.
We may earn a commission when you buy through this link, at no additional cost to you.
3. Scosche LOC2SL – Versatile Line Out Converter with Knob
Scosche LOC2SL
Remote Control Knob
High to Low RCA
Compact Durable Design
OEM Quality Signal
The Scosche LOC2SL is known for its unmatched versatility and compact design. It offers a remote control knob, allowing you to adjust bass levels without getting out of your vehicle. This makes it highly convenient for daily drivers.
Pros
- Remote level control
- Versatile compatibility
- No loss of quality
- Compact design
- Lifetime tech support
Cons
- Installation can be tricky
- Remote wire length
We may earn a commission when you buy through this link, at no additional cost to you.
It ensures seamless integration by converting high-level signals to RCA line level signals for optimal sound. The unit is engineered to minimize signal interference, ensuring clean and powerful sound for your subwoofer setup.
While the brand offers lifetime tech support and a limited warranty, some users may find the wiring slightly complex if their car has a factory amp. The compact design is excellent for fitting into tight spaces under the dashboard.
This product is ideal for audiophiles seeking high-fidelity sound with easy access to level adjustments. It is a reliable upgrade for any car audio enthusiast needing flexibility.
Enhanced Audio Experience
Transform your car audio system by delivering crisp and clear sound quality specifically for your subwoofer.
Trusted Brand Support
Backed by Scosche's Lifetime Tech Support and Limited Warranty, ensuring long-term reliability and service.
We may earn a commission when you buy through this link, at no additional cost to you.
4. Skar Audio SKE2LOC – Active Converter with Remote Bass
Skar Audio SKE2LOC
Active Line Output
Fully Adjustable Bass
Turn-On Options
Remote Level Control
The Skar Audio SKE2LOC is an active converter that provides additional flexibility with its selectable turn-on options. It allows you to choose between DC offset, audio sense, or a remote 12V output depending on your system configuration.
Pros
- Adjustable bass control
- Multiple turn-on options
- Wide frequency response
- Includes remote wire
- Active signal boost
Cons
- Requires power connection
- Larger unit size
We may earn a commission when you buy through this link, at no additional cost to you.
It features fully adjustable bass and main channel controls, giving you precise tuning capabilities. The frequency response spans from 21Hz to 30kHz, ensuring that no audible frequencies are lost during the conversion process.
Because it is active, it requires a power connection which adds a bit to the installation complexity. However, the included remote level control makes it easy to tweak your sound on the go.
This unit is perfect for users who want more control over their bass output and need flexible turn-on methods. It is recommended for systems requiring active signal boosting.
Adjustable Bass Control
Fully adjustable bass and main channel control allow you to fine-tune your audio output exactly as you like.
Versatile Turn-On Options
Select between DC Offset, Audio Sense, or Remote 12V output to match your vehicle's specific electrical system.
We may earn a commission when you buy through this link, at no additional cost to you.
5. NuIth Car Audio – Simple and Effective Converter
NuIth Car Audio
Speaker Wire to RCA
Level Gain Adjustment
Easy Installation
Clean Sound Output
The NuIth Car Audio converter offers a simple and effective solution for connecting a subwoofer to a stock stereo. It allows you to add a 2-channel amplifier or subwoofer easily by converting high-level speaker wire to RCA outputs.
Pros
- Budget-friendly price
- Simple wiring
- Level gain adjustment
- Clean power plug
- Reliable contact
Cons
- Basic build quality
- Limited features
We may earn a commission when you buy through this link, at no additional cost to you.
A key feature is the level gain adjustment, which lets you adjust bass levels without pulling over to change amp settings. The connector design ensures stable bonding and contact, providing clean sound without unnecessary noise or static.
While it may not have premium features like bass boosting or complex tuning, it gets the job done efficiently. The neat power plug makes it easy to install in tight spaces under a dashboard.
This is a great choice for basic car audio systems looking to add a subwoofer without spending much money. It prioritizes functionality and ease of use.
Convenient Level Adjustment
There is a level gain adjustment that allows you to adjust the bass down without manual amplifier access.
Secure Power Connection
The neat power plug features perfect bonding and contact stability to ensure reliable performance over time.
We may earn a commission when you buy through this link, at no additional cost to you.
6. AudioControl LC1i – Editor's Choice Line Out Converter
AudioControl LC1i
Up to 400 Watts
Load Selection Switches
Built-in Line Driver
Ground Isolation Switch
The AudioControl LC1i is a powerhouse for modern vehicles, handling speaker-level signals up to 400W per channel. It is designed to integrate seamlessly with factory amplifiers in newer cars, ensuring your vehicle continues to detect speaker loads correctly.
Pros
- High power handling
- Modern car compatibility
- Ground buzz removal
- Trigger downstream devices
- Compact slim chassis
Cons
- Higher price point
- Remote knob sold separate
We may earn a commission when you buy through this link, at no additional cost to you.
Its built-in line driver provides optimum signals for downstream amplifiers, while the ground isolation switch helps eliminate alternator whine or ground buzz. These features make it a top contender for those seeking high performance and clean audio.
While the remote dash knob is sold separately, the unit still offers selectable GTO signal sense for automatic power control. The compact chassis ensures it fits easily in even the smallest trunk or under-seat spaces.
This converter is highly recommended for those upgrading modern car audio systems with factory amps. It combines high power handling with technical precision for superior sound.
Modern Car Compatibility
Onboard load selection switches allow factory amplifiers to detect speaker loads and continue passing audio properly.
Eliminate Noise Issues
A selectable ground isolation switch allows you to remove ground buzz or alternator whine effectively.
We may earn a commission when you buy through this link, at no additional cost to you.
7. Skar Audio SKAR2CH-LOC – Flat Frequency Range Converter
Skar Audio SKAR2CH-LOC
55 Watts Input
Flat 20Hz-20kHz
60-ohm Load
8 Volts RMS Output
The Skar Audio SKAR2CH-LOC is designed to deliver a flat frequency response from 20Hz to 20kHz at all volume levels. This ensures that your audio signal remains untouched by volume-dependent bass roll-off effects.
Pros
- Flat frequency range
- Circumvents protection
- High RMS output
- Wide radio compatibility
- Compact design
Cons
- No bass boost
- Standard installation
We may earn a commission when you buy through this link, at no additional cost to you.
It applies a 60-ohm load to each channel to circumvent open-circuit protection, which is crucial for many factory radios. It outputs up to 8 Volts RMS, providing a strong signal for your amplifiers.
This unit is compatible with OEM and aftermarket radios, making it versatile for various vehicle types. While it lacks digital bass enhancement features, it delivers consistent sound quality across the frequency spectrum.
This converter is best for users who value a flat frequency response and simple compatibility. It is a solid, dependable choice for most audio upgrades.
Flat Frequency Response
It delivers a flat 20Hz to 20kHz frequency range at all volume levels for consistent audio quality.
Circumvents Protection
Applies a 60-ohm load to each channel to safely circumvent open-circuit protection on factory radios.
We may earn a commission when you buy through this link, at no additional cost to you.
8. AudioControl LC2i – Premium AccuBASS Line Out Converter
AudioControl LC2i
AccuBASS Processing
400 Watts Input
Fixed and Variable Output
Slim Chassis
The AudioControl LC2i is a premium solution for those who want to retain factory features while adding a subwoofer. Its AccuBASS processing corrects and restores bass roll-off when the volume increases on your factory radio.
Pros
- Restores bass roll-off
- Factory feature retention
- Fixed and variable outputs
- Handles high power
- Remote input ready
Cons
- High cost
- Remote knob extra
We may earn a commission when you buy through this link, at no additional cost to you.
With fixed and variable outputs, you can customize your audio and make adjustments easily. It retains factory volume and steering wheel controls, which is a rare feature among converters. The compact chassis includes mounting brackets for easy installation.
Although it comes at a higher price point, the ability to tune your audio with onboard level controls makes it worth it. It is an excellent choice for maintaining original car aesthetics and function.
This is the ideal pick for users who demand the best performance and do not want to lose steering wheel controls. It balances performance and convenience perfectly.
Restores Factory Bass
AccuBASS processing technology corrects and restores bass roll-off when the volume is increased on the factory radio.
Retain Important Features
It retains important factory features including the use of factory volume and steering wheel controls.
We may earn a commission when you buy through this link, at no additional cost to you.
9. SVS SoundPath – Premium Home Audio Adapter
SVS SoundPath
24K Gold-Plated
30 dBV Attenuation
5-way Binding Posts
Wide-Trace PCBs
The SVS SoundPath adapter is primarily designed for home audio, converting speaker level outputs to line level RCA without loss of fidelity. It is a great solution for adding a subwoofer to legacy integrated amplifiers.
Pros
- No loss of fidelity
- Gold-plated connectors
- Narrow-tolerance resistors
- High power handling
- Does not draw power
Cons
- Higher price
- Home audio focused
We may earn a commission when you buy through this link, at no additional cost to you.
It features 24K gold-plated binding posts and RCA jacks for secure connections. The use of narrow-tolerance resistors and wide-trace PCBs ensures high-current and extreme power handling capabilities for reliable performance.
While it does not draw any power from the loudspeaker amplifier, the -30 dBV attenuation ensures a clean signal path. This makes it perfect for high-end home audio setups where signal purity is paramount.
This adapter is recommended for audiophiles with legacy gear who need to add modern subs. It prioritizes build quality and sound accuracy over automotive convenience features.
No Loss of Fidelity
It converts speaker level outputs to line level RCA without any loss of audio fidelity.
Secure Premium Connections
24K Gold-plated binding posts and RCA jacks ensure secure connections for the line-level inputs of your subwoofer.
We may earn a commission when you buy through this link, at no additional cost to you.
10. NVX XLCA2 – Digital Bass Enhancer Line Out Converter
NVX XLCA2
400 Watts RMS
xBOOST Technology
Selectable Auto-On
Remote Bass Control
The NVX XLCA2 is a digital bass enhancer that uses xBOOST technology to optimize bass response. It converts high-level speaker signals to low-level RCA signals, allowing for seamless integration into almost any car audio setup.
Pros
- xBOOST bass tech
- Handles 400W RMS
- Auto-On feature
- Remote bass knob
- Versatile outputs
Cons
- Digital processing may color
- Requires power source
We may earn a commission when you buy through this link, at no additional cost to you.
It handles speaker-level inputs up to 400 watts RMS, providing a strong signal for downstream devices. The included remote bass knob lets you adjust levels directly from the dashboard without pulling over.
The Selectable Auto-On feature ensures efficiency by activating only when needed, saving battery power. With dual amplifier outputs and a 12V trigger, it offers flexible options for complex setups.
This unit is perfect for those who want extra bass punch and convenient remote control. It is ideal for systems needing a digital boost to lower-end frequencies.
Enhanced Bass Response
xBOOST technology optimizes the bass response and provides a deep, powerful bass experience with minimal distortion.
Efficient Auto-On
The Selectable Auto-On feature ensures that the unit activates only when your vehicle is in use.
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 line out converter involves understanding your car's electrical system and audio goals. Here are key factors to consider.
Input Voltage and Power Handling
Ensure the converter can handle the voltage output of your factory head unit. High voltage units need robust converters to avoid distortion.
Look for models that specify input limits in volts or watts to match your system.
Active vs Passive Design
Active converters boost the signal and require power, offering better gain for high impedance systems. Passive units are simpler but may need more gain from your amp.
Choose active for weak signals and passive for simple setups to save power.
Bass Roll-Off Correction
Many factory radios cut bass at high volumes. Converters with bass restoration technology compensate for this loss.
If you need deep bass at all volumes, prioritize units with AccuBASS or similar features.
Remote Turn-On Capability
A remote turn-on wire ensures your amplifier switches on when the radio is active. This prevents battery drain.
Select converters that include a dedicated remote output wire for ease of use.
Frequency Response Range
A flat frequency response ensures no tones are lost during conversion. Look for 20Hz to 20kHz coverage.
Avoid units that cut off frequencies too early to maintain audio quality.
Compact Installation Size
Space under the dashboard is limited. Slim units are easier to hide and secure safely.
Measure your available space and choose a unit with integrated mounting brackets if possible.
Brand Reputation and Warranty
Trusted brands often provide better tech support and reliability. Check if lifetime support is offered.
A strong warranty indicates confidence in the product's durability and build quality.
Cost vs Features
Balancing budget with necessary features is key. Decide if you need advanced tuning or just basic conversion.
Avoid overspending on unnecessary features if your system is simple and standard.
How to Use and Care for Your Line Out Converter Subwoofer
Install the converter in a dry, accessible area near your head unit or under the dashboard. Ensure all connections to speaker wires are secure to avoid signal loss.
Use insulated crimp connectors for all wire taps to prevent shorts or corrosion over time. Check your connections periodically for signs of wear or fraying.
Adjust the gain knobs on both the converter and the amplifier for balanced sound. Avoid setting gain too high as it can introduce noise into the system.
Frequently Asked Questions
Do I need a line out converter if my car has a factory amp?
Yes, you typically need one because factory amps output a high-level signal. A converter transforms this into a line-level signal your aftermarket amp can use.
What is the difference between active and passive converters?
Active converters require power to boost the signal, while passive ones do not. Active units are better for modern cars with high-impedance systems.
Can I use a line out converter with any subwoofer?
Yes, as long as the subwoofer uses RCA inputs. The converter adapts the speaker signal to fit standard RCA inputs on most subwoofers.
Do line out converters affect sound quality?
High-quality converters do not affect sound quality. Cheaper models may introduce noise or distortion if they are not built well.
Is installation difficult for beginners?
Basic installation is manageable with proper tools and instructions. If you are unsure, consult a professional to avoid damaging your vehicle electronics.
Why is my subwoofer not turning on?
Check the remote turn-on wire connection on the converter. It must be properly connected to the amp to trigger the power switch.
Will a converter work with all car models?
Most converters work with standard vehicles, but some high-end models may need special bypass modules to function correctly.
How do I choose between budget and premium options?
Choose based on your needs. If you want basic sound, go budget. If you need tuning and restoration, invest in premium models.
Final Thoughts on Choosing the Best Line Out Converter Subwoofer
We reviewed ten top options ranging from budget-friendly choices like Kicker to premium models like SVS. Each offers unique strengths for different needs.
Prioritize features like bass restoration and power handling based on your specific car audio setup. Compatibility is key to a smooth experience.
Remember that product prices and stock change frequently. Verify current availability and specs before finalizing your purchase online.