Kicker 46KISLOC2
4.5Editor score
Auto remote turn on output
Accepts up to 55 watts input
Simple speaker wire connection
In this guide
Upgrading your car audio system often requires adding a subwoofer for deeper bass. However, factory radios lack the necessary RCA outputs. A line out converter subwoofer solves this by translating speaker signals into usable inputs for amplifiers.
We evaluated ten top-rated converters based on signal fidelity, ease of installation, and feature sets. Our comparison highlights models that preserve audio quality while providing the remote turn-on signals your new amp needs to function correctly.
Each pick below showcases a specific strength such as budget friendliness or premium processing. Prices and availability change frequently so verify details before purchasing. Choose the unit that best fits your vehicle and sound goals.
Top 3 Picks for Best Line Out Converter Subwoofer
AudioControl LC1i
4.7Editor score
Handles up to 400 watts per channel
Onboard load selection switches
Ground isolation switch included
AudioControl LC2i
4.6Editor score
AccuBASS technology restores bass
Variable gain controls included
Remote output for multiple devices
Top 10 Best Line Out Converter Subwoofer in 2026 Compared
The following table provides a quick side-by-side look at key specifications and features across all ten models to help you narrow down your choice.
ProductsSpecificationsEditor scorePrice
Best Budget
Kicker 46KISLOC2
55 watts input capacity
DC offset remote turn on
Stereo RCA outputs
Compact chassis design
4.5Editor score
Editor's Choice
CT Sounds CT-LC2
BassLift technology included
Full range main output
Low pass sub output
34 page manual
4.4Editor score
Best Premium
Scosche LOC2SL
Remote level control knob
Compatible with many systems
OEM quality signal path
Lifetime tech support
4.4Editor score
Skar Audio SKE2LOC
21Hz to 30kHz response
Selectable turn on options
Adjustable bass control
Includes remote wire
4.5Editor score
NuIth Car Audio LOC
High to low conversion
Level gain adjustment
Simple tap wire install
Neat power plug
4.4Editor score
AudioControl LC1i
400 watts per channel
Load selection switches
Ground isolation switch
Slim 4.8 inch chassis
4.7Editor score
Skar Audio SKAR2CH LOC
55 watts input signal
60 ohm load applied
Flat 20Hz to 20kHz
Up to 8 volts output
4.5Editor score
AudioControl LC2i
400 watts per channel
AccuBASS processing
Variable gain control
Remote output trigger
4.6Editor score
SVS SoundPath Adapter
24K gold plated posts
No loss of fidelity
Home audio focused
30dB attenuation
4.3Editor score
NVX XLCA2
400 watts RMS input
xBOOST bass technology
Remote bass knob
9.5V pre out
4.5Editor score
1. Kicker 46KISLOC2 – Best Budget Line Out Converter
Kicker 46KISLOC2
55 watts input capacity
DC offset remote turn on
Stereo RCA outputs
Compact chassis design
The Kicker 46KISLOC2 stands out as the most affordable option for adding a subwoofer to factory systems. With a solid 4.5 star rating users appreciate its plug and play nature. It reliably converts speaker level signals to RCA without needing complex tools.
Pros
- Inexpensive solution
- Easy wiring setup
- Reliable brand quality
- Good signal clarity
- Small footprint
Cons
- No gain control
- Basic feature set
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Its standout quality is the automatic remote turn on wire generation. This feature uses DC offset technology to detect music playback and trigger your amplifier instantly. You save money by not buying a separate remote wire tap kit.
However the unit lacks adjustable gain controls meaning you rely solely on the head unit volume. Some users report minor noise if grounding is poor. These trade-offs are acceptable given the low cost and simplicity.
This converter is ideal for beginners or those on a tight budget. If you just need basic signal conversion and remote activation the Kicker 46KISLOC2 delivers consistent performance without breaking the bank.
Simple DC Offset Turn On
The built in DC offset sensor eliminates the need for a separate remote wire tap making installation faster and cleaner.
Compact Easy Install
Its small size fits easily under seats or in trunks so you do not sacrifice valuable cargo space.
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2. CT Sounds CT-LC2 – BassLift Technology Line Out Converter
CT Sounds CT-LC2
BassLift technology included
Full range main output
Low pass sub output
34 page manual
The CT Sounds CT-LC2 offers a unique selling point with its BassLift technology. This feature compensates for factory bass roll off ensuring your subwoofer gets full signal even at low volumes. It holds a strong 4.4 star rating.
Pros
- Bass compensation tech
- Clear instructions included
- High and low outputs
- Good value
- Easy to wire
Cons
- Adjustment is fixed
- Limited brand support
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It provides both a full range main output and a dedicated low pass subwoofer output. This flexibility allows you to run additional tweeters or midranges while powering the sub. The package includes a detailed manual.
The BassLift adjustment is fixed rather than variable so you cannot tune it precisely. Also the brand is less known than others making long term support harder. Still it offers great value for specific factory systems.
Choose this if your factory radio cuts bass at higher volumes. The CT-LC2 restores that lost low end effectively without needing a complex processor.
Bass Compensation Feature
BassLift ensures your subwoofer receives the full signal spectrum regardless of volume settings on your factory head unit.
Dual Output Capability
You can utilize the full range output for other speakers while sending filtered bass to your sub amplifier.
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3. Scosche LOC2SL – Remote Control Knob Line Out Converter
Scosche LOC2SL
Remote level control knob
Compatible with many systems
OEM quality signal path
Lifetime tech support
The Scosche LOC2SL brings versatility with an optional remote control knob included for level adjustment. This feature lets you tweak bass levels from the driver seat. It maintains a 4.4 star rating for sound quality.
Pros
- Adjustable gain via knob
- Strong signal clarity
- Lifetime tech support
- Easy installation
- Durable build
Cons
- Remote knob optional
- Price higher than basic
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It ensures seamless integration with factory stereos without signal loss. The OEM quality design minimizes interference and noise which is critical for clean audio. Users praise its compact size and durability.
The main limitation is that the remote knob is sometimes sold separately depending on the package. Also it lacks advanced features like crossover controls. These are minor issues given the robust performance.
This unit is perfect for enthusiasts who want some control over their bass output. Scosche lifetime tech support adds confidence for long term reliability.
Remote Level Control
Adjust your subwoofer volume on the fly without pulling over or reaching for the amplifier knobs.
Signal Integrity
Engineered to maintain the original audio quality while converting high level signals to line level.
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4. Skar Audio SKE2LOC – Adjustable Bass Active Line Out Converter
Skar Audio SKE2LOC
21Hz to 30kHz response
Selectable turn on options
Adjustable bass control
Includes remote wire
The Skar Audio SKE2LOC is an active converter designed for broader frequency handling. It covers 21Hz to 30kHz ensuring detailed sound reproduction. With a 4.5 star rating it is popular for its flexibility.
Pros
- Wide frequency response
- Adjustable bass control
- Multiple turn on options
- Good value
- Complete kit
Cons
- Build quality basic
- No load switching
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It offers selectable turn on options including DC offset audio sense or remote 12V input. This versatility makes it compatible with various factory and aftermarket head units. The bass control knob is a nice touch.
The chassis feels slightly less robust than premium brands. It also lacks load switching for modern factory amps. These trade offs are fine for standard setups without complex electronic speaker management.
This converter suits users wanting adjustable bass without high cost. The included remote wire simplifies the process.
Wide Frequency Response
The 21Hz to 30kHz range ensures you capture deep sub-bass and crisp highs accurately.
Multiple Turn On Modes
Choose the activation method that best fits your vehicle wiring for easiest installation.
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5. NuIth Car Audio LOC – Budget Friendly Signal Converter
NuIth Car Audio LOC
High to low conversion
Level gain adjustment
Simple tap wire install
Neat power plug
The NuIth Car Audio LOC offers a low cost entry point for subwoofer upgrades. It handles high to low signal conversion effectively to preserve sound quality. Users give it a 4.4 star rating for simplicity.
Pros
- Very affordable price
- Simple tap installation
- Basic gain adjustment
- Clean wiring
- Compact
Cons
- Basic construction
- Limited range support
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Its design focuses on easy tap into speaker wire installation. The level gain adjustment helps balance output without touching the amp. The power plug is neat preventing clutter in tight spaces.
Construction is basic compared to high end models and it may not suit complex vehicles. Also support options are limited. Still it works well for standard factory radios.
This is a great pick for those prioritizing budget. It solves the core problem of signal conversion affordably.
Simple Gain Control
Adjust output levels directly on the unit to prevent overloading your amplifier input.
Compact Power Design
The neat power plug ensures safe connections without creating messy wire bundles.
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6. AudioControl LC1i – Premium Compact Line Driver
AudioControl LC1i
400 watts per channel
Load selection switches
Ground isolation switch
Slim 4.8 inch chassis
The AudioControl LC1i earns Editor's Choice for its robust handling of high power signals. It converts up to 400 watts per channel ensuring no clipping. Its 4.7 star rating reflects top tier performance.
Pros
- Handles 400 watts
- Ground isolation switch
- Ultra slim design
- Load switches included
- Strong signal clarity
Cons
- More expensive
- No remote knob
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Key features include load selection switches for factory amps and a ground isolation switch to eliminate noise. The chassis is only 4.8 inches long saving space under seats. This attention to detail is unmatched.
It lacks a remote knob and costs more than basic units. However the clarity and features justify the price for serious audio enthusiasts.
This converter is ideal for modern vehicles with integrated amplifiers. The load switches prevent error messages and ensure stable performance.
Ground Isolation Switch
Remove ground buzz and alternator whine with the flip of a dedicated switch on the unit.
Slim Space Saving Design
At under 5 inches long it fits in nearly any vehicle without crowding the trunk.
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7. Skar Audio SKAR2CH LOC – Reliable Flat Frequency Converter
Skar Audio SKAR2CH LOC
55 watts input signal
60 ohm load applied
Flat 20Hz to 20kHz
Up to 8 volts output
The Skar Audio SKAR2CH LOC delivers a flat frequency response from 20Hz to 20kHz. This ensures accurate reproduction of all audio tones. It holds a 4.5 star rating for reliability and ease of use.
Pros
- Flat frequency response
- 60 ohm load fix
- 8 volts RMS output
- Simple installation
- Affordable
Cons
- Lower input capacity
- No gain control
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It applies a 60 ohm load to circumvent open circuit protection in factory systems. This prevents head unit errors when speakers are disconnected. The output reaches up to 8 volts RMS for powerful driving.
Input capacity is limited to 55 watts which is less than high end models. No gain control means reliance on the factory head unit. These are acceptable limits for standard cars.
This unit is a solid choice for vehicles needing load simulation. It simplifies integration while maintaining sound quality.
60 Ohm Load Protection
Circumvent factory speaker circuit errors by simulating a speaker load without physical connection.
High Voltage Output
Up to 8 volts RMS output ensures your amplifier gets a strong signal for clean power.
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8. AudioControl LC2i – Premium Line Converter with AccuBASS
AudioControl LC2i
400 watts per channel
AccuBASS processing
Variable gain control
Remote output trigger
The AudioControl LC2i stands as the best premium option for serious car audio upgrades. It features AccuBASS technology that restores bass lost at high volumes. With a 4.6 star rating it delivers professional grade results.
Pros
- AccuBASS technology
- Variable gain controls
- 400 watts capacity
- Remote output
- Premium build
Cons
- Higher price point
- No remote knob included
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It handles 400 watts per channel and offers variable gain controls for precise tuning. The remote output can trigger multiple devices in your system. This flexibility is unmatched in the category.
It is more expensive than competitors and does not include a remote knob. However the feature set justifies the cost for high end builds requiring precision.
Choose this for vehicles needing complex control and bass restoration. It is a robust choice for audiophiles.
AccuBASS Technology
Restores rolled off bass frequencies so your subwoofer performs correctly even at low head unit volumes.
Variable Gain Precision
Fine tune input levels independently to match your amplifier sensitivity perfectly without distortion.
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9. SVS SoundPath Adapter – Home Audio Specialist
SVS SoundPath Adapter
24K gold plated posts
No loss of fidelity
Home audio focused
30dB attenuation
The SVS SoundPath Adapter is designed primarily for home audio but works in cars too. It offers 24K gold plated binding posts for secure connections. Its 4.3 star rating reflects strong build quality and transparency.
Pros
- Premium gold plating
- High build quality
- No fidelity loss
- High current handling
- Clean design
Cons
- Home audio focus
- Not car specific
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It features 30dB attenuation to safely step down speaker levels without drawing power. The narrow tolerance resistors ensure high current handling. This unit excels in maintaining signal purity.
It lacks car specific features like remote turn on. It is also pricier due to home audio premium. Still it is reliable for clean signal conversion.
This adapter is best for those prioritizing raw audio quality. Use it if you have high quality subwoofers.
Premium Connection Posts
24K gold plated binding posts ensure corrosion free and secure wiring connections.
Zero Fidelity Loss
The circuit is engineered to preserve original sound details without coloration.
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10. NVX XLCA2 – Bass Enhanced Line Out Converter
NVX XLCA2
400 watts RMS input
xBOOST bass technology
Remote bass knob
9.5V pre out
The NVX XLCA2 X-Series offers a distinct xBOOST technology for enhanced low end. It handles 400 watts RMS input making it suitable for high power amps. It holds a 4.5 star rating for bass enhancement.
Pros
- xBOOST bass feature
- Remote bass knob
- Handles 400 watts
- Multiple outputs
- Auto on feature
Cons
- Digital processing quirks
- Complex wiring options
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It includes a remote bass knob for easy adjustments while driving. The auto on feature saves battery power. Multiple outputs allow flexible integration into complex setups.
Some users report minor digital artifacts at high boost levels. The wiring options can be complex for simple setups. These are minor issues for the added bass control.
This unit is ideal for bass lovers needing extra impact. It adds a layer of control missing in standard converters.
xBOOST Bass Technology
Optimizes bass response to provide deep powerful low end with minimal distortion.
Remote Bass Knob
Adjust bass levels directly from the dashboard for immediate sound changes while driving.
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Buying Guide – How to Choose the Best Line Out Converter Subwoofer
Selecting the right converter depends on your vehicle type audio goals and budget. Understanding key factors ensures you pick a unit that protects your gear and enhances sound.
Signal Capacity and Power Handling
Look for converters that match your head unit output. Most handle 55 watts but premium units handle 400 watts. This ensures no clipping or distortion when volume is high.
Choose a model with enough capacity to handle peak signals without degrading sound quality.
Remote Turn-On Activation
Your amplifier needs a signal to turn on. Converters use DC offset or audio sense to generate this. Ensure the method matches your factory head unit features.
Verify the activation method works with your specific stereo to prevent amp issues.
Bass Compensation Features
Factory radios often reduce bass at higher volumes. Units with AccuBASS or BassLift fix this roll off automatically. This is critical for clean subwoofer performance.
Prioritize units with compensation if your car reduces bass as you turn up volume.
Gain Control Adjustability
Some converters allow adjusting input levels via knobs. This helps match your amplifier sensitivity. Fixed units rely solely on the head unit volume.
Choose a converter with gain control for finer tuning of your subwoofer output.
Chassis Size and Build Quality
Space is limited under seats or in trunks. Slim chassis units save room. Build quality determines durability against vibration and heat.
Ensure the size fits your install location and the build is robust enough for car environments.
Noise Reduction Technology
Ground isolation switches help eliminate alternator whine or static. Premium units offer this feature to keep audio clean. Standard units may require extra grounding work.
Look for ground isolation if you live in areas with noisy electrical systems.
Brand Support and Warranty
Reliable brands offer lifetime support and warranties. This matters if you face issues. Check what the company provides before buying.
Always verify warranty terms to protect your investment in audio gear.
How to Use and Care for Your Line Out Converter Subwoofer
Identify the right speaker wires for your rear or front channels using a multimeter. Tap into the positive and negative wires carefully ensuring secure connections.
Route the RCA cables away from power wires to prevent interference. Connect the red and black power wires to a fused source and chassis ground.
Secure the unit tightly where it will not vibrate excessively. Periodically check connections for rust or loose wires to maintain signal quality.
Frequently Asked Questions
Do I need a line out converter if I have a factory amp?
Yes you typically need a converter even with a factory amp. Factory amps often use proprietary signals that need translation to standard RCA inputs for aftermarket subwoofers.
Can I install a line out converter myself?
Most converters are designed for DIY installation. They require basic tools to tap speaker wires and connect RCA cables. Follow the included manual for step by step guidance.
What if my car has a premium factory audio system?
Premium systems often need converters with load switching. This prevents error codes and ensures the head unit detects speakers correctly for stable operation.
Do converters reduce sound quality?
High quality converters maintain original fidelity. Cheap units might add noise. Choose units with good build materials and high voltage ratings for clarity.
How do I set the gain on a converter?
Adjust the gain knob while playing music. Turn it down until distortion clears then increase slightly. This ensures clean signal levels for your amplifier.
Why does my amplifier keep turning on and off?
This often indicates a remote turn-on issue. Verify the converter detects the signal correctly and that power connections are secure to the battery.
Final Thoughts on Choosing the Best Line Out Converter Subwoofer
We found the Kicker 46KISLOC2 perfect for budget needs while the AudioControl LC1i leads in performance. Each model offers distinct benefits for different setups and preferences.
Prioritize features like AccuBASS or remote turn-on based on your specific vehicle. A good converter ensures your investment in an amplifier pays off with clear sound.
Always check current prices before purchasing. Deals change frequently so compare options to ensure you get the best value today.