Polk Audio MM522 5.25" Ultra-Marine 2-Way Car & Marine Speaker – 240W Peak, Titanium Cone, Terylene Tweeter

Overview

The Polk Audio MM522 delivers rugged, clean sound for both car and marine setups. It features a 5.25" titanium-plated composite woofer cone, a 1" Terylene fabric tweeter, and a Santoprene surround, all driven by a design capable of handling 240W peak power. With a broad frequency range from 50 Hz to 40 kHz, you can expect solid bass, crisp highs, and overall clarity without strain.

Sound and technology

• Dynamic Balance technology uses laser-imaged materials to minimize distortion and maximize wide sound dispersion for a more natural listening experience.
• Epoxy-coated crossover ensures precise high and low frequency routing to the drivers for clear, well-defined audio.

Durability for land and sea

Designed to withstand harsh environments, the MM522 carries IP56 Ultra-Marine certification. Waterproof surrounds, a corrosion-resistant fiberglass-reinforced ABS basket with drainage slots, and stainless mounting hardware help protect against salt spray, UV exposure, and humidity.

Installation and versatility

• Bold grilles and included mounting hardware support easy, customized installations as door speakers or standalone marine/car applications.
• Compact 5.25" form factor makes it suitable for a variety of enclosures and spaces without sacrificing performance.

Real-world use cases

Ideal for boat cabins needing reliable, dynamic sound, or cars that demand a robust upgrade in tough conditions. The combination of durable construction and a capable frequency response aims to deliver engaging audio across a wide listening range, while leaving room for your own setup and environment to shape the final result.

Note: Benefits described are possibilities based on the listed specifications and design goals; actual results depend on installation, vehicle or boat acoustics, and listening preferences.