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Sky High Car Audio Hi/Lo converters make it possible to add aftermarket amplifiers, subwoofers and upgraded speakers while keeping the factory radio. These line output converters take the high-level speaker signal from an OEM stereo and convert it into RCA preamp outputs that an aftermarket amplifier can use.

Choose from Sky High Car Audio 2-channel, 5-channel and 6-channel converter options for anything from a basic subwoofer addition to a complete multi-amplifier factory-radio integration system.

What Is a Hi-Lo Converter?

A hi-lo converter—also called a high-to-low converter or line output converter—connects an aftermarket amplifier to a factory radio that does not have RCA preamp outputs.

The converter accepts the amplified speaker-level signal coming from the factory stereo and changes it into a low-level RCA signal. That RCA signal can then be connected to a subwoofer amplifier, four-channel amplifier, five-channel amplifier or multi-amplifier system.

A hi-lo converter is commonly used when you want to:

• Add a subwoofer and monoblock amplifier to a factory stereo.
• Add an aftermarket amplifier without replacing the original radio.
• Retain factory controls, screens and vehicle features.
• Power upgraded door speakers from an aftermarket amplifier.
• Build a larger multi-amplifier system around an OEM head unit.

Choosing the Right Sky High Hi-Lo Converter

The right converter depends on how many factory speaker channels you need to use and how many amplifier channels you plan to add.

Sky High 2-Channel Hi-Lo Converter

A 2-channel converter is generally the simplest option for adding a subwoofer amplifier to a factory radio. It converts one left and one right speaker-level signal into RCA outputs for an aftermarket amplifier.

Choose a 2-channel converter when:

• You are adding one monoblock subwoofer amplifier.
• You only need a left and right signal.
• The factory system has a usable full-range or bass signal.
• You are building a straightforward factory-radio bass upgrade.

View the Sky High Car Audio 2-channel Hi-Lo converter.

Sky High 5-Channel Hi-Lo Converter

A 5-channel converter is designed for larger systems where you need signal for front speakers, rear speakers and a subwoofer stage while keeping the factory head unit.

Choose a 5-channel converter when:

• You are adding a five-channel amplifier.
• You are powering front and rear speakers plus a subwoofer.
• You need several RCA output channels from the factory radio.
• You are building a more complete aftermarket audio system.

View the Sky High Car Audio SH-HL5 5-channel Hi-Lo converter.

Sky High 6-Channel Hi-Lo Converter

A 6-channel converter gives advanced systems additional signal-routing flexibility. It is better suited to multi-amplifier installations, front and rear speaker stages, dedicated subwoofer channels and larger factory-radio integration builds.

Choose a 6-channel converter when:

• You are installing multiple amplifiers.
• You need front, rear and subwoofer signal channels.
• You are building a full aftermarket system while retaining the stock radio.
• You need more adjustment and system-control flexibility.

View the Sky High Car Audio SH-HL6PRO 6-channel Hi-Lo converter.

Do You Need a Hi-Lo Converter With a Factory Radio?

You generally need a hi-lo converter when the factory radio does not provide RCA outputs and the aftermarket amplifier does not accept the factory speaker-level signal directly.

Some amplifiers include high-level inputs, which may eliminate the need for a separate converter. However, a dedicated line output converter can provide more installation flexibility, additional output channels and easier amplifier signal connections.

Before selecting a converter, determine:

• Whether the amplifier accepts high-level inputs.
• Which factory speaker wires contain the signal you need.
• Whether the factory signal is full-range or frequency-limited.
• How many RCA channels the finished system requires.
• Whether the vehicle has a factory amplifier.
• Whether the factory stereo uses signal processing or bass roll-off.

Factory Radio Integration Considerations

Modern factory audio systems can be more complicated than a basic left-and-right speaker connection. Some vehicles use factory amplifiers, crossed-over signals, active noise cancellation, equalization, all-pass filters or volume-dependent bass reduction.

A basic hi-lo converter works best when it receives a clean signal containing the frequencies required by the aftermarket amplifier. Connecting to a factory speaker channel that has little or no bass can result in weak subwoofer output even when the converter and amplifier are functioning properly.

For more help planning the signal path, read our guide to choosing a line output converter for a factory radio. :contentReference[oaicite:0]{index=0}

Hi-Lo Converter vs DSP

A hi-lo converter and a digital signal processor can both help connect aftermarket equipment to a factory stereo, but they are not the same product.

A hi-lo converter primarily converts speaker-level signal into RCA-level signal. A DSP may also provide signal summing, equalization, crossover control, time alignment, channel routing and more advanced tuning.

A standard hi-lo converter may be the right choice for a simple amplifier or subwoofer addition. A DSP may be better when the factory audio signal is heavily processed or the system requires detailed tuning across multiple speakers and amplifiers.

What Else Is Needed to Add an Amplifier?

The converter handles the audio signal, but it does not replace the rest of the amplifier installation equipment.

A typical installation may also require:

• An aftermarket amplifier
• An amplifier wiring kit
• Power and ground wire
• Proper fuse protection
• RCA cables
• Speaker wire
• Remote turn-on wiring or signal-sensing capability
• A subwoofer and enclosure when adding bass

Browse Sky High Car Audio amplifier wiring kits and Sky High Car Audio amplifiers to complete the installation.

Common Hi-Lo Converter Installation Mistakes

• Connecting to factory speaker wires that do not contain the needed frequencies.
• Reversing speaker-wire polarity.
• Setting converter or amplifier gain too high.
• Using weak power or ground connections.
• Routing RCA cables beside high-current power wiring.
• Ignoring factory amplifiers or factory signal processing.
• Assuming every factory speaker channel contains a full-range signal.
• Using an incorrect remote turn-on method.

For complete system-routing examples, see the Audio Sellerz car audio wiring diagram guide. :contentReference[oaicite:1]{index=1}

Why Buy Sky High Hi-Lo Converters From Audio Sellerz?

Audio Sellerz is a real car audio shop with experience installing amplifiers, subwoofers, speakers, factory-radio integration equipment and complete electrical systems.

We understand that a converter is only one part of the system. The factory signal, amplifier, wiring, grounding, gain settings, speakers and electrical support all need to work together for the finished installation to perform correctly.

Shopping with Audio Sellerz makes it easier to compare the converter, amplifier, amp kit, wire and supporting equipment needed for a complete factory-radio upgrade.

Frequently Asked Questions

What does a hi-lo converter do?

It converts the speaker-level output from a factory radio into a low-level RCA signal that an aftermarket amplifier can use.

Can I add a subwoofer without replacing the factory radio?

Yes. A hi-lo converter can provide the RCA signal needed to connect a subwoofer amplifier while retaining the original radio.

Do all amplifiers need a line output converter?

No. Some amplifiers accept speaker-level inputs directly. A separate converter is needed when the amplifier requires RCA inputs or when the installation needs additional signal-control flexibility.

Should I use a 2-channel or multi-channel converter?

A 2-channel converter usually fits a basic subwoofer addition. A 5-channel or 6-channel converter is better for systems powering several speaker channels and a dedicated subwoofer stage.

Will a hi-lo converter improve sound quality?

Its main purpose is signal conversion. Final sound quality also depends on the factory signal, converter adjustment, amplifier tuning, speaker quality, installation and system design.

Can a hi-lo converter cause noise?

Noise may occur when wiring, grounding, signal routing or gain settings are incorrect. Proper installation and strong electrical connections are important.

Does a hi-lo converter provide remote turn-on?

Some converters offer signal-sensing or remote-output features, while others may require a separate switched remote source. Check the features of the specific converter before installation.

Shop Sky High Car Audio Hi-Lo Converters

Compare Sky High Car Audio 2-channel, 5-channel and 6-channel Hi-Lo converters for adding subwoofers, amplifiers and complete aftermarket systems to factory radios. Select the converter based on the factory signal, number of amplifier channels and overall system plan.

Dealers, shops, installers and resellers interested in Sky High Car Audio products can apply through the Audio Resellerz dealer portal.