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Polk Audio MM522 MM1 Series 5.25″ 300W Coaxial Speakers with Ultra-Marine Certification

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SKU: MM522
On Sale Now! 28% Off!

$329.00 $237.35

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Polk Audio MM1 Series 5.25″ 300W Coaxial Speakers with Ultra-Marine Certification: Polk MM1 Series – Crafted for Full-On Powerful Sound, No Matter What Vehicle Their Mounted In


Polk Audio MM522 Features:

  • Premium upgrade tuned for the total sonic accuracy found in a studio monitor speaker
  • Meticulously conceived, designed and engineered for advanced high performance sound
  • Dynamic Balance technology provides rich, clean, full-range sound by eliminating distortion and unwanted resonant frequencies
  • Low protrusion pivoting 1” Terylene tweeter ensures clear, detailed highs

Advanced High- Performance Sound

Every element of the MM1 Series is meticulously engineered for high-performance sound—Dynamic Balance technology, a pivoting 1” Terylene tweeter, UV tolerant titanium plated composite cones, lightweight neodymium motor structure—plus, glass fiber formers, oversized voice coils and high-temp Conex spiders for increased power handling.

Dynamic Balance Technology

Enjoy a rich, clean, full-range sound with our patented Dynamic Balance technology engineered into every MM1 speaker. Rigorously tested and developed by our talented Polk Audio engineers, whose passion rests in the principles of great sound, Dynamic Balance technology features non-resonant materials so you get extremely clear highs, mids and lows no matter what you’re listening to.

Neodymium Motor Structure

Compact lightweight neodymium motor structure provides more output with less power and overall higher efficiency—plus easier drop-in installation.

Glass Fiber Formers, Oversized Voice Coils and High Temperature Conex Spiders

All three combine to create a high efficiency driver, for elevated sound, increased power handling, better linearity, lower distortion and greater durability.

Non-corrosive Fiberglass Reinforced Baskets

Offers heavy-duty protection for back half of the speaker, which helps prevent corrosion and general wear and tear.

Integrated Epoxy Coated Crossovers

With its second order high/low pass system, you’re ensured the right frequencies reach the right speakers in your setup for optimal system blending regardless of the vehicle you’re in or the elements you encounter.

Polk Audio MM522 Specs

Weight 0.9 kg
Model Name

MM1 Series 5.25" 300W Coaxial Speakers with Ultra-Marine Certification




Polk Audio

Total Pieces


Included Accessories

(2) Grille
(2) Mounting Hardware
(2) Wiring Harness

Drivers Warranty

1 years

Original Purchaser Only


Qty Included


Driver Enclosure Type

Ultra-Marine Certified

Driver Complement

• (1) 5.25" (13.34 cm) d (Round) Dynamic Balance Driver – Mid/Woofer
• (1) 1" (2.54 cm) d (Round) Pivoting Terylene Tweeter – Tweeter




4.6" (11.68 cm)

Full-Range Mounting Depth - Top Mount

2.36" (5.99 cm)

Full-Range Mounting Depth - Bottom Mount

2.56" (6.5 cm)

Grille Shape


Grille Depth

0.92" (2.34 cm)

Total Frequency Response

50 Hz → 40 Hz

Nominal Impedance

4 ohms

Max Sensitivity (1 watt @ 1 meter)

92 dB


1st Order (Woofer) 2nd Order (Tweeter) at 5.0 kHz

Peak Power Handling

300 watts

Power Handling (per channel)

100 watts → 300 watts

Polk Audio in Australia: Innovating Car Audio Experiences

Polk Audio is an established name in the world of sound technology, known for its commitment to innovation, sound quality, and durability. The brand has made significant inroads into the Australian market, becoming a popular choice among audio enthusiasts, especially in the car audio segment.

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What's in the Box:

  • 2 x Grille
  • 2 x Mounting hardware
  • 2 x Wiring harness


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