Why Shop Sonic Free Shipping Free Tech Support Easy Returns Low Price Guarantee Details

Polk Audio MM651

6-1/2" 2-way Mobile Monitor MM Series Speakers

4.3

(23 reviews)

Read 23 reviews

Write a review

Will this fit my car?

Select Vehicle >

Specials with this product

  • Free Ground Shipping to the 48 statesdetails
MM Series Superior Performance

The Mobile Monitor Series by Polk Audio is the result of 3 years of research and development. The series uses high quality materials and the newest loudspeaker technology to bring the listener an unforgettable experience. The best part about the MM Series is the affordable price.

  • 6-1/2" Mobile Monitor MM Series 2-way Marine Certified Speakers
  • Power Handling:
    • Peak: 400 watts per pair / 200 watts each
    • RMS: 200 watts per pair / 100 watts each
  • Woven glass composite cone woofer
  • Butyl rubber surround
  • 1" Silk composite dome tweeter
  • 2.7 ohms impedance
  • Klippel distortion analyzer
  • 1-1/4" Large diameter voice coil
  • Neodynium magnet structure
  • Carbon composite basket
  • Top-mount depth: 2-5/8"
  • Grille Included
  • 1-year SonicElectronix.com warranty

Priced Per Pair

Note: Polk Audio specifies the nominal impedance of these speakers to be 2.7 ohms. The product box states the impedance to be 4 ohms and the speaker magnet shows 2 ohms, this has been confirmed by Polk Audio to be an incorrect specification. The product manual is correct in stating the nominal impedance of the MM series of speakers to be 2.7 ohms.

Product History:
Polk Audio MM651 thumbnail
(newest, current model)
Polk Audio MOMO MMC650 thumbnail
(previous model, replaced by Polk Audio MM651)
Speaker Specifications
Speaker Size6-1/2"
Design2-way
Tweeter DesignDome
Tweeter CompositionSilk
Woofer CompositionWoven Glass Fiber
Woofer SurroundButyl Rubber
Peak Power Handling200 watts
RMS Power Handling100 watts
Sensitivity94 dB
Frequency Response40 - 25000 Hz
Impedance (Per Voice Coil)2.7
Shallow Mount InstallationN/A
Top-Mount Depth2-5/8"
Bottom-Mount Depth2-7/8"
Cutout Dimensions5
Speaker GrillesN/A
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderSonic Electronix
Customer Review Summary for Polk Audio MM651
Average Customer Rating is 4.3 out of 5 stars:
4.3
based on 23 Reviews
Share your thoughts with others:
Rating Distribution:
Average Attributes Rating:
Durability
4.4
Value
4.6
Features
4.3
Design
4.5
Usability
4.5
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
January 8, 2012 polk audio
Review by
brett from metairie, LA
Overall
Durability
Value
Features
Design
Usability
I would not recommend because after 2 weeks in my truck the outside rubber pieces of the speaker came apart and i had to change them out with morel spekers and it cost me money.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
December 4, 2011 Great sound
Review by
Joe from Sparwood bc, Canada
Overall
Durability
Value
Features
Design
Usability
I bought these to install into my Polaris rzr into the factory Polaris pods. I had to trim the openings of the pods a bit to make them fit but running off of deck power they are plenty loud. They have been covered in mud an snow. I have cleaned them with indirect spray from a pressure washer. They still look and sound great.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
November 7, 2011 Polk MM651 Excellent
Review by
MJM from Minneapolis, MN
Overall
Durability
Value
Features
Design
Usability
Great sound from a small magnet 6 1/2. Really delivers on the low end and great clarity on the mids & highs.

Small magnet size also allows for installation in tight spaces. Highly recommended for a coax install.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
October 20, 2011 Wow... Smooth... Accurate..,Polk quality
Review by
Now sold on Polk !!! from Comox BC, Canada
Overall
Durability
Value
Features
Design
Usability
These are incredible, so smooth and accurate, my music selection is from hard rock to classical and these baby's perform!! I have these in the rear doors and the mm6501 components in the front and the punch these deliver is hard hitting if you crank them and mellow and full stage for my classical music at a moderate volume. I love these speakers and are my first choice from now on!!! I highly recommend these speakers, the quality is all Polk and as in the name "Mobile Moniters" you will not be dissatisfied. Rating: FIVE STARS They are worth the price!!and they have individual cross overs also to help with the sound image.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
October 18, 2011 Great Sound!
Review by
barbb0 from Pearland, TX
Overall
Durability
Value
Features
Design
Usability
Son installed these in his boat. Great sound quality.
Help other customers find the most helpful reviews
Was this review helpful to you?
Report Abuse | Write a Review
Share on Facebook Share on Twitter Share on Delicious Share on Buzz
View All 23 Reviews for Polk Audio MM651
Speaker Wire
Upgrade your factory speaker wire to aftermarket speaker wire and hear the difference! Using thicker gauges, newer technology, and higher quality materials, aftermarket speaker wire is key to upgrading the sound in your car.
 ProductPriceAdd?
20 ft. of 16 AWG KICKER X-Series Speaker Wire20 ft. of 16 AWG KICKER X-Series Speaker Wire
Get high quality sound from Kicker's twisted-pair, true to gauge speaker wire.
$19.99
50 ft. of 14 AWG StreetWires Speaker Cable50 ft. of 14 AWG StreetWires Speaker Cable
Streetwires Super Cable provides a zero-grip insulation for a smooth install as well as true gauge twisted wire construction.
$29.99
50 ft. of 16 Gauge Monster XLN Series Speaker Cable50 ft. of 16 Gauge Monster XLN Series Speaker Cable
Upgrade to clean and clear sound with Monster Cable's Xtra Low Noise (XLN) construction.
$35.00
Sound Dampening Material
Get optimal sound from your new speakers with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
 ProductPriceAdd?
Dynamat Xtreme Speaker KitDynamat Xtreme Speaker Kit
Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!
$21.99
Dynamat Dynaxorb Speaker PakDynamat Dynaxorb Speaker Pak
Revolutionary damping material designed to prevent distortion caused by the back wave of a speaker interfering with the front wave.
$19.99
Dynamat Rubber RollerDynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat products!
$18.99
Ballistic Speaker KitBallistic Speaker Kit
Eliminate speaker distortion, road noise, and rattles with this sound dampening material from Ballistic.
$15.99
Speaker Baffles, Spacers, and Depth Extenders
Mount your speakers in the location that you need with these speaker spacers, extenders, and adapters.
 ProductPriceAdd?
Speaker Baffles for your SpeakersSpeaker Baffles for your Speakers
Enhance the sound of your speakers with these easy to install speaker baffles.
$9.99
1" Depth Extender for 6-1/2" Speakers1" Depth Extender for 6-1/2" Speakers
Speakers too deep for your installation location? Add an extra inch of space with these depth extenders.
$6.99
1/2" Depth Extender for 6-1/2" Speakers1/2" Depth Extender for 6-1/2" Speakers
Need just a little more room to install your new speakers? These 1/2" spacers are just what you are looking for.
$4.99
Installation, Tools & Accessories
Get all of the tools and accessories to install your new speakers like a professional, or take your car to an expert and have them installed by redeeming professional installation cards.
 ProductPriceAdd?
Door Panel & Upholstery Remover ToolDoor Panel & Upholstery Remover Tool
The ideal tool for removing your car's door panels to replace you speakers!
$9.99
Universal Window Handle Remover ToolUniversal Window Handle Remover Tool
Designed to easily remove the manual window handles without breaking any interior pieces.
$4.99
Universal Wire Puller & GrabberUniversal Wire Puller & Grabber
Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!
$6.99
16-14 AWG Butt Connectors16-14 AWG Butt Connectors
These blue butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers!
$4.99
Tone Generators and Sound Testing Equipment
Optimize your new system's sound quality by testing and calibrating all of your components with these items.
 ProductPriceAdd?
AutoSound 2000 CD-101AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
 ProductPriceAdd?
Polk Audio MM651Polk Audio MM651$119.99

Product Summary

Manufacturer: Polk Audio
Model number: MM651
UPC: 747192114510
Weight: 7.00 lbs
Internal SKU: mm651
Internal product ID: 14716

Price Information

$199.99

–$80.00

$119.99

Add an Optional Extended Warranty

Add

$13.99

$

In Stock

save to wish list

X-Factor Dance Contest - over $2,800 in prizes.

Customer Testimonial

I am very happy with the response and help from Daniel Z and his team - your customer service and fulfillment of orders is outstanding!
Thank you.
Craig B.

- Craig from Belmont, CA

See more…

Recently Viewed Items

mm651 thumbnail

15" Ultra Excursion Dual 2 ohms Subwoofer

mm651 thumbnail

1600W Max, Class D MonoBlock Amplifier

mm651 thumbnail

12" Subwoofer (FREE UPGRADE TO NEW 2007 MODEL: TS-W307D2)