Hifonics ZS525CX 5.25" 2-Way Coaxial Speakers

The Hifonics ZS525CX is a pair of 5.25-inch, 2-way coaxial car speakers designed for replacing compatible factory door, dash, or rear-deck speakers. Each speaker combines a woofer and centrally mounted tweeter in one assembly, helping simplify a full-range speaker upgrade. Their 4-ohm impedance suits many conventional car-audio speaker circuits. Confirm the factory opening, mounting depth, and wiring connection before purchase.

With 30 watts RMS and 200 watts peak power handling per speaker, the ZS525CX is intended for modest-power car-audio systems. It can be used with a compatible aftermarket head unit or an amplifier whose output is matched appropriately. The 60 Hz to 20 kHz frequency-response rating covers low-midrange, vocal, and high-frequency duties expected from a compact coaxial speaker. Sensitivity is rated at 88 dB.

A 1-inch Neo-Mylar soft-dome tweeter handles the upper frequencies, while the alpha-cellulose woofer cone is designed for a rigid, lightweight moving surface. The rubber surround is moisture resistant, making it appropriate for typical vehicle-door environments. A passive Butterworth crossover manages the transition between the woofer and tweeter. The specified crossover point and slope are 4 kHz and 12 dB.

The speaker uses a pure-copper voice coil with a Kapton former, plus an overcoil cooling design that moves air over the voice coil through the spider. Its epoxy-infused natural-fiber spider supports cone movement, while the ferrite-magnet motor provides the magnetic structure. An anti-resonant stamped-steel basket provides the mounting frame. Spade terminals allow connection with compatible speaker leads or direct soldering.

The ZS525CX is a practical option for a vehicle that accepts 5.25-inch coaxial speakers and has adequate mounting clearance. Hifonics specifies a 4.48-inch mounting cutout and 2.0-inch chassis depth, with a 6.26-inch outside diameter. Grilles are included for installations where the speakers are exposed rather than mounted behind factory panels. The pair can serve as a focused replacement upgrade or as part of a larger system with compatible front, rear, and subwoofer components.

Key Features

• 5.25-Inch Coaxial Design: Combines woofer and tweeter in each speaker.
• 30W RMS Per Speaker: Supports appropriately matched head-unit or amplifier power.
• 1-Inch Neo-Mylar Tweeter: Reproduces upper-frequency detail in a compact assembly.
• Alpha-Cellulose Woofer Cone: Provides a lightweight, rigid cone structure.
• Passive Butterworth Crossover: Directs frequencies between woofer and tweeter.
• Steel Basket And Ferrite Motor: Provides a rigid frame and magnetic motor structure.

Design & Installation

The ZS525CX uses a black anti-resonant stamped-steel basket, ferrite magnet motor, rubber surround, alpha-cellulose cone, and Neo-Mylar soft-dome tweeter. Its pure-copper voice coil uses a Kapton former, while an epoxy-infused natural-fiber spider and overcoil cooling system support operation. High-temperature adhesive bonds the surround and cone. Included grilles help protect speakers used in visible locations.

Verify that the vehicle provides at least the required 4.48-inch cutout and 2.0-inch chassis-depth clearance before installation. Mount the speakers securely in compatible factory or custom locations, observe positive and negative terminal polarity, and keep wiring clear of window mechanisms, sharp metal edges, and moving parts. The included grilles may not be needed when the speakers are installed behind factory door or trim panels. Professional installation can be useful when interior-panel removal, adapters, or custom mounting is required.