Car

MM521

5 1/4-inch coaxial loudspeaker

5 1/4" coaxial
13.34cm coaxial

Price

$22995 per pair

Available Finishes:
Additional Images

Designed to Perform

Through the use of high-tech carbon composite baskets, powerful neodymium motor structures using oversized voice coils, and state-of-the-art woven glass composite cones, we offer high-end audio performance normally found only in the most expensive loudspeaker systems. In addition, these space age materials offer weight savings that can mean higher performance for your car or boat. Don’t settle for factory-installed sound!

MM521 Features:

Space age materials reduce weight of components while offering rock solid reliability, advanced looks and ultra high performance.

Neodymium magnets a rare earth metal offering exceptional strength to performance ratio, found only in the most exotic speakers, saves tremendous weight. Don’t let the sound system weigh your vehicle down. Since the magnet is smaller, the speaker can fit into more applications.

Carbon composite basket based on the spokes of a wheel is lightweight, will not flex during peaks and looks great! Don’t be afraid to show off the back of your speaker.

Woven glass composite cones feature tremendous stiffness-to mass ratio. Lower mass means faster transients and finer detail.

Klippel optimized components using a state-of-the-art Klippel distortion analyzer, Polk engineers were able to optimize the woofer’s motor structure, voice coil alignment and suspension for the best possible performance, even at extreme listening levels.

Large-diameter voice coils (30mm) in drivers increase reliability and power handling capacity.

Swivel mount tweeters allow precise aiming of sound.

Stylish grille is included.

All Polk products are made using the best materials and the most advanced manufacturing techniques. They pass the industry’s most exhaustive quality tests, including drop testing, extreme signal response and UV & salt exposure testing. Polk loudspeakers are built to perform for a lifetime.

Driver Complement

Tweeter
Quantity
Diameter1" (2.54cm) 
TypeSoft dome 
Mid / Woofer
Quantity
Diameter5 1/4" (13.34cm) 
TypeDynamic Balance driver with poly-composite cone 

Electrical

Total Frequency Response50-25kHz 
Nominal Impedance2.7 ohms
Efficiency92 dB
Power Handling
Continuous90 watts
Peak200 watts

Dimensions

Cut-Out Diameter4 5/8" (11.75cm) 
Grille
Height13/16" (2.06cm) 
Full-Range Mounting Depth
Top Mount2 3/8" (6.03cm) 
Bottom Mount2 13/16" (7.14cm) 

Shipping

Unit of Measurepair 

Warranty

Speaker Warranty1 year parts and labor (original purchaser) 

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.

MM521 Media

MM521 Accessories