Infinity Reference REF407F 4" Coaxial Speakers

Product Overview

Bring stronger midbass and clear, smooth highs to your car audio system with the Infinity Reference REF407F 4-inch coaxial speakers. This 2-way speaker pair uses a Plus One+ polypropylene woofer cone and textile balanced-dome tweeters in a compact design.

Use them with a factory or aftermarket stereo, or pair them with an external amplifier for more headroom. Their 1.875-inch top-mount depth can help when space behind a door panel is limited.

Key Features & Benefits

• Plus One+ woofer cone: The oversized polypropylene cone and hi-roll rubber surround move more air for impactful bass from a 4-inch driver.
• Textile dome tweeter: The 1/2-inch balanced-dome tweeter delivers clear, smooth high frequencies.
• Power handling: The speakers handle up to 35W RMS and 105W peak.
• Four-ohm compatibility design: The stated 3-ohm speaker impedance combines with vehicle wiring to present a 4-ohm load.
• Efficient output: A sensitivity rating of 92 dB @ 2.83V helps produce more output with less power.

Technical Specifications

Why Choose This Product?

The REF407F pair is designed for listeners who want fuller sound from a compact 4-inch speaker. Its woofer construction focuses on stronger midbass, while the textile dome tweeter handles high frequencies with a smooth presentation.

The 92 dB sensitivity and stated power handling offer flexibility with a factory head unit or an external amplifier. Choose these speakers when their size, depth, and listed ratings suit your audio system and installation space.

Installation & Compatibility Notes

The speakers are designed to fit behind factory grilles or panels in many applications, but check the available opening and mounting depth before installation. The top-mount depth is 1.875".

Grilles are not included, so confirm that your factory grille or panel can be used with the installation. The speakers are compatible with factory or aftermarket stereos; an external amplifier is also an option.

Frequently Asked Questions

What is the power handling of the REF407F speakers?

They are rated for up to 35W RMS and 105W peak.

What does the impedance design mean for my stereo?

The speaker’s 3-ohm impedance combines with vehicle wiring to present a 4-ohm load, supporting compatibility with factory and aftermarket radios.

Will these speakers fit behind my factory panels?

They are designed for behind-panel installation in many applications. Compare the 1.875-inch top-mount depth and your vehicle’s available space before installing.

Are grilles included?

No. Grilles are not included; check whether your factory grille or panel is suitable for your installation.

What comes with the speaker pair?

The box includes two 2-way speakers, adhesive backed foam gasket strips, an owner's manual, an instruction manual, and a template on the box.

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