Skar Audio RPX4 4" 2-Way Coaxial Car Speakers

Skar Audio RPX4 are 4-inch, 2-way coaxial car speakers sold as a pair that deliver clear midrange and crisp highs with 120 watts peak handling and a 20mm silk dome tweeter.

These compact coaxial speakers replace factory units while improving clarity and durability without requiring extra amplification. Built with a microfiber paper cone and butyl rubber surround, the RPX4 pair balances musical detail and long-term reliability. They suit small doors, rear decks, or factory locations where space is limited but better sound is wanted.

How do the RPX4 speakers improve factory sound?

The RPX4 speakers are designed to be a direct upgrade over many stock 4" units by offering cleaner midrange and defined high frequencies. Their silk dome tweeter smooths out sibilance and the microfiber cone keeps vocals natural. Sensitivity and impedance match common factory radios so you get audible improvement even without an external amp.

• Higher sensitivity (89 dB) for better volume from factory head units
• 20mm silk dome tweeter for clearer highs and vocal presence
• Microfiber paper cone for balanced midrange response
• Butyl rubber surround for reduced distortion and longer life

Will these speakers handle louder listening or an amplifier?

The RPX4 pair handles up to 120 watts peak (60W each) and 30 watts RMS per pair, so they perform well with moderate volume levels. They are suitable for use on stock radio power and pair nicely with a small amplifier for more headroom. Avoid sustained clipping from overdriven systems to protect the silk tweeter and voice coil.

• Peak power: 120 watts per pair (60W each) for dynamic peaks
• RMS rating: 30 watts per pair for continuous listening without strain
• 4-ohm impedance matches most factory and aftermarket head units
• Works well with modest external amplification for cleaner output

What kind of sound profile and frequency coverage do they deliver?

These 2-way speakers cover a broad audible range from 50 Hz to 20 kHz with a smooth roll-off below tight bass. Expect focused mids, clear highs from the silk tweeter, and limited deep bass due to their compact 4" size. They are ideal for improving clarity and detail rather than replacing full-range sub-bass performance.

• Frequency response: 50–20,000 Hz ±3 dB for wide coverage
• Silk dome tweeter emphasizes natural highs and reduced harshness
• Compact cone size prioritizes midrange clarity over deep bass
• Good choice for full-range balance in small mounting locations

How durable and easy to install are the RPX4 speakers?

Construction uses durable materials such as a microfiber paper cone and premium butyl rubber surround to resist wear and maintain performance over time. Their standard 4" form-factor fits many factory openings and mounting points, making installation straightforward for most vehicles. The speakers come as a matched pair to simplify replacing both sides for cohesive soundstage.

• Butyl rubber surround for longevity and consistent performance
• Microfiber cone resists deformation while keeping sound natural
• Standard 4" size compatible with common factory locations
• Sold as a pair for balanced left/right upgrade

Who is this for? The Skar Audio RPX4 pair is aimed at drivers who want a noticeable upgrade from stock 4" speakers without changing head units or adding large amplifiers. If you need clearer vocals, smoother highs, and reliable materials in a compact speaker that fits factory openings, these are a practical, budget-friendly choice.