4

Infinity REF407F 4" Reference Series 2-Way Coaxial Car Speakers (Pair) | 35W RMS | Premium Factory Speaker Upgrade

 Description

Upgrade your factory audio with the Infinity REF407F 4-inch Reference Series speakers. Featuring Plus One™ polypropylene woofers, edge-driven textile tweeters, 35W RMS, 105W peak power, and 92 dB sensitivity. Shop genuine Infinity speakers at East Car Audio.

Experience the Legendary Infinity Sound

Bring your factory audio system to life with the Infinity REF407F Reference Series 4-inch 2-way coaxial speakers. Designed to provide significantly better clarity, smoother highs, and stronger midbass than factory speakers, the REF407F is an excellent upgrade for cars, trucks, SUVs, and classic vehicles using 4-inch speaker locations.

Infinity's latest Reference Series combines Plus One™ woofer technology, an edge-driven textile tweeter, and a compact basket design that fits many factory locations without modification. The result is cleaner vocals, more detailed instruments, and an overall richer listening experience.

Why You'll Love the Infinity REF407F

✅ 35 Watts RMS Power Handling

✅ 105 Watts Peak Power

✅ Premium 4" Two-Way Coaxial Design

✅ Plus One™ Polypropylene Woofer Cone

✅ Edge-Driven Textile Tweeter

✅ High 92 dB Sensitivity

✅ Compact Basket for Easy Installation

✅ Excellent Factory Speaker Replacement

Premium Features

Plus One™ Woofer Technology

Infinity's patented Plus One™ cone architecture increases the cone surface area compared to traditional speakers of the same size, delivering improved bass response and greater efficiency.

Edge-Driven Textile Tweeter

The 1/2-inch textile dome tweeter produces smooth, natural highs without harshness, allowing vocals and instruments to sound crisp and detailed.

Optimized Compact Basket

The redesigned basket helps the REF407F fit many factory speaker locations while maintaining excellent cooling and durability.

3-Ohm Design for More Output

Infinity's 3-ohm impedance allows compatible factory and aftermarket stereos to deliver more usable power than many standard 4-ohm speakers, resulting in improved volume and dynamics.

Technical Specifications

Perfect For

• Factory speaker replacement
• Dash speaker upgrades
• Rear deck speakers
• Classic car restorations
• Daily driver audio systems
• Cars, trucks, SUVs, and vans
• Factory or aftermarket radios

What's Included

• (2) Infinity REF407F 4" Coaxial Speakers
• Foam Mounting Tape
• Owner's Manual

Factory grilles are typically reused on most vehicle applications.

Frequently Asked Questions

Are these sold as a pair?

Yes. This package includes two Infinity REF407F speakers.

Can I run these from my factory radio?

Yes. Their efficient design makes them an excellent upgrade for factory stereos while also performing exceptionally well with aftermarket amplifiers.

Do these fit every vehicle?

They fit many vehicles that use 4-inch factory speakers, but you should verify your vehicle's speaker size and mounting depth before purchasing.

Can I add an amplifier later?

Absolutely. While they perform well on factory power, adding a quality amplifier will provide even greater clarity and dynamic range.

Why Buy from East Car Audio?

At East Car Audio, we're passionate about helping customers build better-sounding vehicles. Whether you're replacing a single pair of speakers or upgrading an entire sound system, we carry premium products backed by expert advice and outstanding customer support.

When you shop with us, you receive:

• ✅ Genuine Infinity products
• ✅ Fast shipping
• ✅ Competitive pricing
• ✅ Expert installation advice
• ✅ Vehicle-specific recommendations

Recommended Upgrades

• Hifonics HSP-4.8DSP 32-Bit Digital Signal Processor
• 4-Channel Amplifier
• OFC Speaker Wire
• Sound Deadening Material
• Vehicle-Specific Speaker Adapters
• Amplifier Wiring Kit
• Custom Subwoofer Enclosure from East Car Audio