Infinity REF-6522EX Shallow-Mount 6-1/2 in Coaxial Speakers - Clear

In this review the Infinity REF-6522EX shallow-mount 6-1/2 in coaxial car speakers are examined for drivers who need a straightforward, drop-in upgrade to factory door or rear locations. The single biggest reason to buy is the combination of a Plus One+ polypropylene woofer cone with hi-roll rubber surround and an edge-driven textile dome tweeter, which together deliver noticeably better clarity and fullness than most stock speakers without requiring deep mounting space. Installers will appreciate the included brackets that adapt to common 6-3/4 in and 6-1/2 in openings for easier fitment.

Key Features

• Shallow-mount design: Lets you replace many factory 6-1/2 in speakers in door panels with limited depth while maintaining a solid low-end response.
• Plus One+ woofer cone: The larger cone surface area provides fuller midbass and cleaner midrange for the same cone diameter compared with standard woofers.
• Hi-roll rubber surround: Improves cone excursion control and long-term durability, helping the speaker keep consistent performance over time.
• Edge-driven textile dome tweeter: Delivers clear high frequencies and smoothing of the top end for better vocal and instrument detail.
• Installation brackets included: Allow mounting in a variety of 6-3/4 in and 6-1/2 in openings so the speakers fit many stock locations without custom adapters.
• Power and sensitivity: Handles up to 55 watts RMS with a 93 dB sensitivity, making these suitable for use with factory and modest aftermarket head units.

Who It's For

These speakers are best for drivers who want a noticeable sound upgrade from stock car speakers without a deep mount or complex installation. They suit owners of older vehicles where factory speakers are worn or thin, and for anyone installing speakers in tight rear door cavities or travel trailers where space is limited.

Those seeking extreme high-power performance, subwoofer-level bass, or component-level staging should look elsewhere; this is a versatile coaxial upgrade focused on improved clarity and fit rather than high-power competition use.

Pros & Cons

Pros

• Excellent clarity and improved midrange detail versus typical factory speakers, giving vocals and instruments more presence.
• Shallow top-mount depth and included brackets make installation easy in many stock 6-1/2 in and 6-3/4 in openings.
• Good build quality with a Plus One+ polypropylene cone and hi-roll rubber surround for reliable performance and longevity.
• Decent efficiency at 93 dB, so they play well with factory head units and modest amplifiers.

Cons

• Limited low-frequency extension compared with larger woofers or a dedicated subwoofer, so bass head users may want additional low-end support.
• Power handling is moderate at 55 watts RMS, so those planning heavy power upgrades should consider higher-rated options.

Specifications

Speaker type	Shallow-mount 6-1/2 in 2-way coaxial
Woofer cone	Plus One+ polypropylene
Tweeter	1 in edge-driven textile dome
Power handling	55 watts RMS / 165 watts peak
Impedance	True Four Ohm system (3 ohm speaker combined with wire)
Frequency response	57 - 21,000 Hz
Sensitivity	93 dB
Top-mount depth	1-13/16 in

Our Verdict

The Infinity REF-6522EX is a practical, well-built coaxial replacement for most factory 6-1/2 in locations, delivering clearer highs and stronger midbass than stock speakers while fitting shallow door cavities. It is good value for drivers wanting a clean, reliable sonic upgrade without an external amplifier, though serious low-frequency enthusiasts should add a subwoofer for full bass impact.

Frequently Asked Questions

Will these speakers fit stock 6-1/2 in mounting points?
Yes, the included brackets allow mounting in a variety of 6-3/4 in and 6-1/2 in openings for many factory locations.

Do these need an external amplifier?
No, the 93 dB sensitivity and 55 watts RMS handling make them suitable for use with most factory head units, though an amp can improve dynamics.

How deep are these speakers?
The top-mount depth is 1-13/16 in, designed for shallow-mount applications where space behind the panel is limited.