JBL GX528 5.25-Inch Coaxial Car Speakers, Pair

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Product guide

JBL GX528 5.25-Inch Coaxial Car Speakers, Pair

JBL GX528 coaxial car speakers are a 5.25-inch pair intended for vehicle audio upgrades. The listing gives a 45-watt maximum output figure, while its description separately states 45Wrms and 135W peak, so buyers should treat the power details as inconsistent and confirm the intended rating.

At a glance

The title identifies the product as a pair of 5.25-inch coaxial car speakers.
The description claims polypropylene Plus One woofer cones and edge-driven soft dome tweeters.
The description reports 65Hz – 21kHz frequency response, 91dB sensitivity, and three-ohm voice coils. These are descriptive claims, while the details table lists a different frequency response.

Price

$57.75Save 42%

Reference price: ~~$99.94~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Customer feedback describes good sound and reports that installation can be easy.
The 5.25-inch coaxial format is aimed at replacing or upgrading car speakers in matching openings.

Cons

The listing marks the speakers as not water resistant, limiting their suitability to locations where moisture exposure is not expected.

Technical specifications

15 specifications

Identity and audio
Brand	JBL
Model	GX528 5.25
Speaker type	Coaxial
Speaker size	5.25 inches
Maximum output power	45 watts
Frequency response	21 KHz
Audio output mode	Stereo
Driver type	Dynamic Driver
Enclosure material	Polypropylene, Plastic
Color	Black

Connectivity and controls
Control method listed	Touch
Compatible devices listed	MP3 Player, Smartphone

Power and installation
Power configuration	Corded Electric
Mounting types listed	Car Mount,Coaxial

Materials and protection
Water resistance listed	Not Water Resistant

What to know before buying

Listing details to confirm

Listing details conflict or remain unconfirmed: power appears as 45 watts maximum in the specifications and 45Wrms plus 135W peak in the description, while frequency response appears as 21 KHz in the details and 65Hz – 21kHz in the description. The title says a pair, but item-count fields say one. Confirm the selected listing's power rating, frequency specification, package quantity, and vehicle fit before purchase.

Who is it for?

A good fit for

Drivers seeking 5.25-inch coaxial speakers for a car installation, after confirming fit and package quantity.
Buyers who weigh customer reports of good sound and easy installation against vehicle-specific fit uncertainty.

Less suited to

Installations exposed to water or persistent moisture.
Buyers who need a confirmed fit for a particular vehicle without checking its speaker opening and mounting requirements.

JBL GX528 5.25-Inch Coaxial Car Speakers, Pair · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 308 ratings

5 stars78%78%
4 stars12%12%
3 stars4%4%
2 stars4%4%
1 star2%2%

Customer feedback reports good sound, easy installation, and favorable value, while fit and installation experiences are not uniformly positive. That matters for this 5.25-inch car-speaker pair because the listing does not establish vehicle-specific fit, and its stated pair quantity conflicts with item-count details. Ratings lean strongly toward five-star, but ratings alone do not explain individual experiences.

Positive themes

Customer feedback describes good sound quality and easy installation.
The supplied feedback describes the speakers as a budget-friendly option.

Mixed feedback

Fit feedback is mixed, including reported compatibility issues for a specific vehicle.
Installation feedback includes mixed experiences despite reports that installation can be easy.

Frequently asked questions

Are these sold as a pair?

The title says pair, but the listing also reports one item and a unit count of 1 Count. Confirm the selected package quantity before ordering.

What power rating should I use when checking compatibility?

The details state 45 watts maximum, while the description lists 45Wrms and 135W peak. These claims are inconsistent, so confirm the rating with the listing before matching an amplifier.

Will they fit my car?

The listing gives a 5.25-inch size, but customer feedback reports mixed fit and some vehicle-specific compatibility issues. Check your vehicle's opening and mounting requirements.

Can these be used where they may get wet?

The listing states Not Water Resistant, so they are not presented as suitable for wet locations.