Polk Audio® MM521 - 5-1/4" 2-Way MM Series 200W Speakers

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Polk Audio® - 5-1/4" 2-Way MM Series 200W SpeakersPolk Audio® - 5-1/4" 2-Way MM Series 200W SpeakersPolk Audio® - 5-1/4" 2-Way MM Series 200W SpeakersPolk Audio® - 5-1/4" 2-Way MM Series 200W SpeakersPolk Audio® - User's GuidePolk Audio® - MM Series CatalogPolk Audio Authorized Dealer
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Universal Fit
Fitment Notes:
  • Not Vehicle Specific
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Polk Audio Car Audio

Universal 5-1/4" 2-Way MM Series 200W Speakers by Polk Audio®. Make your driving more pleasant and enjoyable with top-drawer speakers that will change your and your passengers' world of sound. The audio speakers are made extremely durable to provide years of reliable and hassle-free service.

Polk Audio - InformationPolk Audio - FaqsPolk Audio - About


  • Diameter 1" (2.54cm)
  • Type Soft dome
  • Mid / Woofer
  • Diameter 5 1/4" (13.34cm)
  • Type Dynamic Balance driver with poly-composite cone
  • Total Frequency Response 50-25kHz
  • Nominal Impedance 2.7 ohms
  • Efficiency 92 dB
  • Power Handling
  • Continuous 90 watts
  • Peak 200 watts
  • Cut-Out Diameter 4 5/8" (11.75cm)
  • Grille
  • Height 13/16" (2.06cm)
  • Full-Range Mounting Depth
  • Top Mount 2 3/8" (6.03cm)
  • Bottom Mount 2 13/16" (7.14cm)


  • Sold as Pair
  • Speaker Size: 5-1/4"
  • Design: 2-Way
  • Tweeter Design: Dome
  • Tweeter Composition: Silk-Polymer Composite
  • Woofer Composition: Woven Glass Fiber
  • Woofer Surround: Butyl Rubber
  • Peak Power Handling: 200 Watts
  • RMS Power Handling: 90 Watts
  • Sensitivity: 92 dB
  • Frequency Response: 50 - 25000 Hz
  • Impedance: 2.7 Ohms
  • Top-Mount Depth: 2-1/2"
  • Cutout Dimensions: 4-11/16 x 4-11/16
  • Speaker Grilles: Yes

Polk Audio, the speaker specialist and now the largest audio brand of DEI Holdings, was founded in 1972 in Baltimore with one objective in mind: to design and engineer audio equipment that would deliver iconic, engaging, and authentic sound at home, in a car, and at an office. Polk Audio designers and engineers are not only skilled experts, they're also musicians who know something much bigger about how to create the clearest sound. At Polk, music is still their passion and designing practical audio solutions that deliver lifelike performance is their mission.

Part Number:

Vehicle Fitment

This part is universal
Year Make Model Fitment Notes:
ALL       ALL        ALL         This part is universal
    Polk Audio® - 5-1/4" 2-Way MM Series 200W SpeakersPolk Audio® MM521 - 5-1/4" 2-Way MM Series 200W...    $229.95
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