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


Mobile Monitor Loudspeaker Systems

Available Finishes:

There are no downloads available. If you need assistance, please contact us.

Mobile Monitor Loudspeaker Systems

Now you don't have to compromise your home audio standards when listening to music in your car. Polk Audio's engineers have brought the same amazing quality, technology, and innovation of the Grand Prix Award winning Polk home speakers to your automobile. Not surprisingly, two of the Polk Mobile Monitor designs (the MM10A and MM6900) have already won Autosound Grand Prix Speaker of the Year awards.

Polk Mobile Monitor automotive systems sound extraordinary. They are silky smooth and perfectly balanced, with a deep, accurate bass performance that leaves the "boom, crash, tinkle" of typical car speakers in the dust. Even at the loud volume levels so often required on the road, Polk Mobile Monitors are non fatiguing and easy to listen to. Borrowing the same trilaminate polumer cone and dome tweeter technologies developed for the highly acclaimed Polk home Monitor Series, the Mobile Monitors provide unequaled clarity and the awesome power required to effortlessly resolve every musical detail even over road noise.

Spectacular SDA Imaging Hits the Road!:

Now you can experience the accuracy and excitement of live-sound imaging in your car by installing a Polk SDA Mobile Monitor system. An SDA crossover matrix used in conjunction with 2 pairs of Mobile Monitor speakers (front and rear) literally expands the boundaries of the automotive listening environment.

The SDA Mobile Monitor system solves the acoustic shortcomings of automotive interiors and car stereos. First, by cancelling interaural crosstalk distortion, the SDA system frees you from the feeling that you are listening inside a small box. The sound is open, spacious, and three dimensional, as if you were listening in a concert hall. Second, the sound stage is maintained in front of you as it would be in real life, rather than from behind as with conventional autosound systems. Third, excellent bass response is sustained by means of Polk;s exclusive Sub-Bass Drive circuit. Of the Polk SDA Mobile system, Car Stereo Review said, "Polk has triumphed...It's like jumping into hyperspace."

A Mobile Monitor System for Every Car:

Given the wide variety of vehicles on the road, and the myriad of placement options, Polk Mobile Monitors come in many configurations to suit practically any installation. Your Polk dealer can help you choose the system that's right for your car. Go ahead, push the envelope. Doesn't your car deserve the best?

MM6902 Specifications:

6 x 9 inch three-way two-piece component system
Cut Out Dimensions
LF - 8-3/4" x 5-7/8" oval
Mounting Depth
MF/HF - 4-1/4 x 2-1/2 (flush)
4-5/8 x 2-3/4 (behind panel) LF 3-1/8, MF/HF - 1
Overall Frequency Response
34-20,500 Hz
Rec. Amplification
5-100 watts/channel
Nominal Impedance
4 ohms
Effieciency (1 watt/1 meter)
92 db


Total Frequency Response34-20,500 Hz 
Nominal Impedance4 ohms
Efficiency92 dB
Recommended Amplifier Power5-100 watts per channel

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.

MM6902 Media

MM6902 Literature

Want to know more? Want to dig just a little deeper to learn about this product? Here's a list of source material that will give more detail, other perspectives, and answer questions you may have.

Series Catalogs

MM6902 Accessories