This product is a vintage Polk model and is not available for sale, but it may still be available in some stores as a closeout or used product. The following text is taken from the original sales brochure for this product and does not reflect current availability. If you happen to have any question or concerns about this product, or any other Polk Audio product, feel free to contact our Customer Service Department at 1-800-377-7655 Monday - Friday, 9am - 5:30pm EST


5 1/4

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American Power, Italian Finesse

A small package of beautiful styling and tremendous power, the MM455 5.25" driver is housed in its exclusive cast aluminum, diamond-polished MOMO Arrow basket for extreme durability.

It's heavy metal, built for speed and sound, and it fits right in your car.

  • Polk/MOMO is built tough and backed by a three year Parts and Labor warranty, the best warranty in the car speaker world.
  • The super strong polymer/mica composite cones, airtight Elastomer rubber surrounds and flat, bulletproof Aramid Fiber spiders deliver rock solid mid-bass response and lifelike midrange detail.
  • The "billet-style" grille minimizes obstructions for an even more "open" sound; a sound you won't find in any other little speaker, especially one that looks this cool.
  • The component system features the MM400 Dome Tweeter, and the beautiful new Polk Audio/MOMO Crossover.

You can plainly see (and hear) the benefits of the new MM System Crossover: Mylar capacitor/air core inductor tweeter components for better transparency. Polypropylene capacitor/laminated steel midrange components handle high current without saturation for more dynamic impact. 12dB/octave slope with midrange bypass, 3-position tweeter attenuation for the ultimate in flexibility. Gold signal traces and gold-plated terminals for exact connections.

Polk Audio/MOMO High Performance Car Audio Speakers are built by Polk Audio with ultra high-tech materials for competition-level performance and durability. They're styled exclusively by MOMO, the world's preeminent designer of racing accessories, to look as good as they sound. And for motor sports enthusiasts the world over, a MOMO product is a charismatic symbol of the finest quality.

When you consider your car an extension of your personality, Polk Audio/MOMO High Performance Car Audio is the perfect synthesis of technology and design.

For more information on Polk/MOMO components visit Polk/

Driver Complement

Diameter1" (2.54cm) 
TypeSilk Composite Dome - ULV fluid- cool voice coil with Neodymiunm magnet 
Mid / Woofer
Diameter5 1/4" (13.34cm) 
TypeCast aluminum diamond-polished basket - Poly mica composite cone 


Total Frequency Response68hz-20khz 
Nominal Impedance4 ohms
Efficiency86 dB
Voice Coil
Driver Diameter1" (2.54cm) 
Tweeter Diameter1" (2.54cm) 
Magnet Weight13.50 pounds
Recommended Amplifier Power25-100 watts per channel


Cut-Out Diameter5" (12.70cm) 
Height1 5/8" (4.13cm) 
Length4 3/4" (12.06cm) 
Width3 3/8" (8.57cm) 
Tweeter Cut-Out Diameter2 1/16" (5.24cm) 
Height3/4" (1.91cm) 
Diameter6 4063/10000" (16.27cm) 
Driver Mounting Depth
Top Mount2 1797/2500" (6.91cm) 
Bottom Mount3" (7.62cm) 
Tweeter Mounting Depth
Flush Mount Depth7/8" (2.22cm) 
Surface Mount Height1 39/2500" (2.58cm) 


Speaker WarrantyLimited 3 Year Parts and Labor 

Specifications, dimensions and features subject to change without notice. For more information call us at 1-800-377-7655 (USA and Canada). Outside of North America call +1 (410) 358-3600.

MM455 Media

MM455 Literature

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Series Catalogs

MM455 Accessories