Skar Audio RPX46 4×6-Inch 2-Way Coaxial Car Speakers – 150W Max, 45W RMS, Pair

Microfiber Paper Woofer Cone for Natural Sound Reproduction

The Skar Audio RPX46 features a microfiber paper woofer cone engineered to reproduce midrange frequencies with responsive movement and controlled performance.

Paper-based speaker cones have long been used in automotive and home audio systems because they can provide a favorable balance of low weight and acoustic damping.

The microfiber construction is designed to support clean, accurate sound reproduction.

Benefits of the Microfiber Paper Cone

• Lightweight cone construction
• Responsive midrange reproduction
• Controlled cone movement
• Natural vocal presentation
• Suitable for everyday music listening

The RPX46’s compact woofer is particularly useful for reproducing vocals, guitars, and other midrange musical content.

However, its 4×6-inch dimensions limit the amount of deep bass it can reproduce compared with larger speakers or dedicated subwoofers.

Premium Butyl Rubber Surround for Long-Term Reliability

The RPX46 uses a premium butyl rubber surround.

The surround is the flexible material connecting the speaker cone to its frame.

It allows the cone to move while helping maintain proper alignment and controlled excursion.

Butyl rubber is commonly used in automotive speakers because it offers useful flexibility and resistance to environmental aging.

Benefits of Butyl Rubber Surrounds

• Supports controlled woofer movement
• Provides flexibility during speaker operation
• Helps maintain consistent cone suspension
• Offers practical durability in automotive environments
• Supports reliable everyday performance

This construction makes the RPX46 a practical choice for replacing aging factory speakers with deteriorated surrounds.

20mm Silk Dome Tweeter for Clear High Frequencies

Each Skar Audio RPX46 speaker features an integrated 20mm silk dome tweeter.

The tweeter is responsible for reproducing higher-frequency audio content that the woofer cannot efficiently reproduce on its own.

Silk dome tweeters are commonly used for their smooth high-frequency characteristics.

Designed to Reproduce

• Vocal harmonics
• Cymbals and percussion
• Guitar detail
• Piano overtones
• Instrument separation
• High-frequency musical textures

The integrated coaxial design combines the woofer and tweeter into a single speaker assembly.

This simplifies installation compared with separate component speaker systems.

91 dB Sensitivity for Efficient Performance

The Skar Audio RPX46 features a manufacturer-listed sensitivity rating of 91 dB.

Sensitivity describes how efficiently a speaker converts electrical input into acoustic output under specified test conditions.

An efficient speaker can produce useful listening volume with relatively modest amplifier power.

This makes the RPX46 a practical option for compatible factory radios and aftermarket head units.

Actual performance depends on the stereo’s available clean output, speaker installation, and vehicle acoustics.

4-Ohm Impedance for Factory and Aftermarket Audio Systems

The RPX46 uses a nominal 4-ohm impedance.

This is a common impedance rating for aftermarket automotive speakers.

The speakers can be used with compatible factory radios, aftermarket head units, and external amplifiers designed to operate with 4-ohm loads.

However, some premium factory audio systems use lower-impedance speakers or proprietary amplification.

Pro Street Tip: Verify the original speaker impedance before replacing factory speakers, particularly in vehicles equipped with premium audio packages.

Frequency Response for Full-Range Listening

The supplied product information lists two different frequency-response specifications:

• 40 Hz–20,000 Hz
• 40 Hz–25,000 Hz ±3 dB

Both describe a broad frequency range, but the exact upper-frequency limit should be verified against Skar Audio’s current technical specifications.

The RPX46 is designed to reproduce a broad range of musical content, including vocals, instruments, and higher-frequency details.

However, a published low-frequency response figure does not mean a compact 4×6-inch speaker can reproduce deep bass at high volume.

For stronger low-frequency performance, consider pairing the RPX46 with a dedicated subwoofer.

Compact 4×6-Inch Design for Factory Speaker Replacement

The Skar Audio RPX46 uses a 4×6-inch oval speaker configuration.

This size is found in various factory automotive audio systems, particularly in certain older vehicles.

Common Installation Locations

• Dashboard speaker openings
• Front door speaker locations
• Rear speaker panels
• Factory 4×6-inch mounting positions
• Custom speaker adapter installations

A nominal 4×6-inch speaker size does not guarantee direct fitment.

Always verify the mounting depth, cutout dimensions, mounting-hole pattern, and available clearance for your specific vehicle.

Some installations require adapter brackets or wiring harness adapters.

Ideal for Factory Radio Power

One of the RPX46’s advantages is its compatibility with appropriately matched factory and aftermarket audio sources.

With a relatively modest continuous power-handling rating and 91 dB sensitivity, these speakers can be a practical upgrade without requiring a large external amplifier.

Factory Stereo Installation

Replace compatible factory speakers while retaining the original head unit.

This can be especially useful in older vehicles where the factory radio is still functional.

Aftermarket Head Unit Installation

Pair the RPX46 with a compatible aftermarket stereo for improved audio control and sound reproduction.

External Amplifier Installation

Use a properly matched amplifier when additional clean headroom is desired.

Always verify the amplifier’s continuous output at 4 ohms and calibrate the system correctly.

Choosing the Right Amplifier for Skar Audio RPX46 Speakers

The RPX46 is rated for approximately 22.5 watts RMS per speaker.

This makes amplifier matching especially important.

An amplifier capable of delivering substantially more continuous power than the speakers can handle may damage them if its output is not appropriately limited.

Recommended Amplifier Considerations

• Match amplifier output to the speakers’ RMS rating.
• Verify 4-ohm compatibility.
• Set amplifier gain correctly.
• Use appropriate high-pass filtering.
• Avoid excessive bass boost.
• Prevent clipping and distortion.

Pro Street Tip: A properly matched 25W RMS-per-channel amplifier can be more suitable than a poorly configured 100W RMS-per-channel amplifier.

Improve Sound Quality with Proper Installation

Even a quality aftermarket speaker can sound disappointing when installed incorrectly.

For the best results, pay attention to mounting, wiring, and speaker sealing.

Installation Recommendations

Secure Mounting: Use the correct mounting hardware and adapter brackets.

Correct Polarity: Match positive and negative speaker connections to prevent phase-related sound cancellation.

Speaker Sealing: Use appropriate foam gaskets to reduce air leaks around the mounting surface.

Sound Deadening: Consider automotive sound-deadening materials to reduce unwanted panel vibration.

Moisture Protection: Preserve factory moisture barriers and protect the speakers from direct water exposure.

High-Pass Filtering: Use appropriate crossover settings to reduce excessive low-frequency demands.

Skar Audio RPX46 vs. Aging Factory Speakers

Replacing worn factory speakers can improve clarity and restore sound quality.

Actual improvements depend on the condition and quality of the original speakers, installation, and audio source.

DIY Stereo Wiring and Speaker Installation Resources

Planning a Skar Audio RPX46 speaker upgrade?

Before removing your factory speakers, identify the correct speaker wiring, polarity, and mounting requirements.

My Pro Street Online provides DIY automotive stereo resources for enthusiasts upgrading their own vehicles.

Explore My Pro Street Online for stereo wiring diagrams, speaker installation information, and aftermarket audio guides.

Pro Street Installation Tip: Use vehicle-specific wiring harness adapters whenever possible to avoid unnecessary modifications to factory wiring.

Skar Audio RPX46 Technical Specifications

Why Choose the Skar Audio RPX46?

The Skar Audio RPX46 combines quality speaker materials, efficient performance, and a compact factory-replacement design in an affordable coaxial speaker package.

Its microfiber paper woofer cone is engineered for responsive midrange reproduction.

The premium butyl rubber surround supports controlled cone movement and long-term durability.

The integrated 20mm silk dome tweeter provides detailed high-frequency reproduction, while the 91 dB sensitivity rating makes the speakers suitable for many compatible factory and aftermarket audio systems.

With 45W RMS combined power handling and a 4-ohm nominal impedance, the RPX46 offers a practical solution for drivers who want improved sound quality without building an expensive custom audio system.

For enthusiasts restoring an older vehicle or replacing worn factory speakers, the Skar Audio RPX46 is an excellent balance of value, sound quality, and installation convenience.

Upgrade Your Speakers with Pro Street Online

Replace aging factory speakers and enjoy clearer everyday audio with the Skar Audio RPX46 4×6-Inch 2-Way Coaxial Car Speakers.

This package includes two speakers, making it ideal for replacing one pair of compatible factory speaker locations.

Pair them with a compatible factory radio, aftermarket head unit, or properly matched amplifier for a complete audio upgrade.

Explore more car speakers, amplifiers, head units, subwoofers, and installation accessories at Pro Street Online.