Speakers

Whether you’re into four-wheeling, two-wheeling, hot-rodding, or just a leisurely drive, you’ll find no better way to enjoy your music on the road, or off, than with our db, DXi or MM loudspeakers and component systems. These series continue to be the performance standard and all offer the kind of styling that can work in a big-block American classic or a high-tech import.

MM5251 5.25” 2-Way Component System

5 1/4-inch mobile audio/marine component loudspeaker system

The MM5251 is a 5 1/4-inch component speaker system designed to fit in a variety of applications. As a result of 3 years of Polk research and development, the new MM series have been designed to offer unparalleled sound quality with exceptional fit to meet virtually any application. Borrowing technology from our flagship SR Series, the MM Series offers exceptional value for the price. 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.

RRP $449.00 AUD

Product Manual

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.

Tweeters can be either flush or surface mounted.

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
Diameter 1" (2.54cm) 
Type Soft dome 
Mid / Woofer
Quantity
Diameter 5 1/4" (13.34cm) 
Type Dynamic Balance driver with poly-composite cone 

Electrical

Total Frequency Response 50-25kHz 
Nominal Impedance 2.7 ohms
Efficiency 92 dB
Power Handling
Continuous 90 watts
Peak 200 watts

Shipping

Unit of Measure system 

Installation

Cut-Out
Diameter 4 5/8" (11.75cm) 
Driver Mounting Depth
Top Mount 2 3/8" (6.03cm) 
Bottom Mount 2 13/16" (7.14cm) 
Grille
Height 1 1/16" (2.70cm) 

Warranty

Speaker Warranty 1 year parts and labor (original purchaser)