Infinity Reference REF687F 5"x7" / 6"x8" Coaxial Speakers

Name: Infinity Reference REF687F 5"x7" / 6"x8" Coaxial Speakers
Brand: Infinity
Price: 129.99 USD
Availability: InStock

$129.99 $149.99

Shipping calculated at checkout.

Key features

Speaker size: 5×7″, 6×8″
RMS power per speaker: 60 W
Speaker impedance: 3.0 ohms
Frequency response: 49 Hz–21 kHz
Sensitivity (2.83 V/1 m): 93 dB
Mounting depth: 61.1 mm

Description

Product Overview

Give your car’s factory audio a clearer, fuller sound with the Infinity Reference REF687F 5"x7" / 6"x8" coaxial speakers. This 2-way pair combines a Plus One+ woofer cone with an adjustable tweeter for stronger midbass and a smoother high end.

Key Features & Benefits

Plus One+ woofer: The polypropylene cone and hi-roll rubber surround move more air for fuller midbass in daily listening.
Adjustable tweeter: Set the 1" textile dome tweeter’s level to suit its mounting location and help maintain a natural soundstage.
Vehicle-friendly sizing: Designed for 5"x7" and 6"x8" openings commonly found in Ford, Jeep, and Chrysler vehicles.
Efficient performance: The 93 dB sensitivity supports satisfying output with modest amplification.
Practical power handling: The 60W RMS rating provides headroom for a balanced automotive audio system.

Technical Specifications

Specification	Details
Brand	Infinity
Model	Reference REF687F
Speaker type	2-way coaxial speakers
Speaker size	5"x7" / 6"x8"
Woofer cone	Plus One+ polypropylene cone with hi-roll rubber surround
Tweeter	1" textile edge-driven dome tweeter
Tweeter level adjustment	3.0 dB
Impedance	True Four Ohm Impedance Technology: a 3-ohm design combined with vehicle wiring yields a true 4-ohm load
Power handling	60W RMS; 180W peak
Frequency response	49–21,000 Hz
Sensitivity	93 dB @ 2.83V
Top-mount depth	2.32"
Included	Two 2-way speakers, two adhesive-backed foam gaskets, instruction manual
Grilles	Not included

Why Choose This Product?

The REF687F is made for a common installation challenge: upgrading sound in vehicles with 5"x7" or 6"x8" speaker openings. Its larger-than-standard cone for this size adds midbass presence, while the tweeter level adjustment helps you tune high-frequency output to its position in the vehicle.

Use the pair as a speaker upgrade in a compatible factory location. The stated impedance design is intended to provide a true 4-ohm load when combined with vehicle wiring, making it a practical option for systems using factory or aftermarket head units.

Installation & Compatibility Notes

Check your vehicle’s speaker opening and available mounting depth before purchase. The top-mount depth is 2.32", and the speakers are designed for 5"x7" and 6"x8" openings commonly used in Ford, Jeep, and Chrysler vehicles.

The product description states that the speakers fit behind most factory grilles. Grilles are not included. Adjust the tweeter level to suit its mounting location.

Frequently Asked Questions

What comes in the box?

The package includes two 2-way speakers, two adhesive-backed foam gaskets, and an instruction manual. Grilles are not included.

What power can the REF687F handle?

Each speaker is rated for 60W RMS and 180W peak power.

What does the tweeter level adjustment do?

The 3.0 dB adjustment lets you set tweeter output to suit its mounting location in the vehicle.

What impedance should I expect?

Infinity’s True Four Ohm Impedance Technology uses a 3-ohm design that, combined with vehicle wiring, yields a true 4-ohm load.

Will these fit my vehicle?

They are designed for 5"x7" and 6"x8" openings commonly found in Ford, Jeep, and Chrysler vehicles. Check your vehicle’s opening and mounting depth before buying.