Garage
Shop

See all parts that fit your 1998 Grand Caravan

Polk Audio MM651UM Special Edition Black

6.5" 2-Way Ultra Car/Marine/Motorsports Marine Certified Mobile Monitor MM Series Coaxial Speakers (OEM Bulk Pack)

Product videos
highlight-star-icon

• Peak Power: 400W
• RMS Power: 200W
• 1" Silk Composite Soft Dome Tweeter
• Mounting Depth: 2-5/16"
• Woven Glass Composite Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 92dB

Learn more about the mm651um-oeblack

We apologize

This item has been discontinued

NVX - Worth the Envy - Direct to Consumer Car Audio

Loading...
Limited time!
KFC-1666S main

Kenwood KFC-1666S

600W Peak (60W RMS) 6.5" Sport Series 2 Way Coaxial 4-ohm Car Speakers

51
-38.75%

$49.00

List price $80.00

H7683 main

Cerwin Vega H7683

720W Peak (120W RMS) 6x8" HED Series 3-Way Coaxial 4-ohm Speakers

50
-16.67%

$79.99

List price $95.99

Limited time!
46CSC54 main

Kicker CSC5 (46CSC54)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

15
-33.36%

$79.96

List price $119.99

Kenwood KFC-6996PS

1300W Peak (300W RMS) 6x9" Performance Series 5-way Dual 4-ohm Coaxial Car Speakers

2
-46.67%

$79.99

List price $150.00

Product Highlights


• Peak Power: 400W
• RMS Power: 200W
• 1" Silk Composite Soft Dome Tweeter
• Mounting Depth: 2-5/16"
• Woven Glass Composite Woofer Cone
• 4 Ohm Impedance
• Sensitivity: 92dB

Description


Polk Audio brand icon

Authorized dealer

Will fit most 6x9" and 5x7"/6x8" locations,
with appropriate speaker adapter. Click "Related Items" Tab.



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.



What does Marine Certified mean?

The MM Series speakers get put through the ASTM (American Society for Testing and Materials) marine testing to become marine certified. The speakers go through two harsh tests: the B117-03 Standard Practice for Operating Salt Spray (Fog) Apparatus and the D4329-99 Standard Practice for Fluorescent UV Exposure of Plastics. The Salt Fog tests exposes the components 95° Fahrenheit and 5% salt solution for 500 hours and the UV test puts the speakers through 8 hours of UV-B light, black body temperature of 60 degrees Celsius and 4 hours condensate water, black body temperature of 40 degrees Celsius. These tests ensure these speakers will last in the harshest of marine environments.



General Features

  • 6-1/2" Ultra Marine 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
  • Recommended power range: 15 - 110 Watts RMS per channel
  • Woven glass composite cone woofer
  • Butyl rubber surround
  • 1" Soft dome weather resistant dynamic balance tweeter
  • Completely sealed speakers for marine use
  • Built-on grille
  • Sealed crossover assembly is built into the back of the magnet
  • Klippel distortion analyzer
  • 3 ohm impedance
  • 1-3/8" (30mm) Large diameter voice coil
  • Neodymium magnet structure
  • Salt, fog and UV Resistant
  • Top-mount depth: 2-5/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Priced Per Pair

Note: These speakers are in Brand New Condition. Ships in generic brown box, not Polk Audio beauty box.



Product history:

Polk Audio MM651UM-Black thumbnail
(newest, current model)
Polk Audio MM651UM thumbnail
(previous model, replaced by Polk Audio MM651UM Special Edition Black)

Loading...
RVM-35V1 main

MB Quart RVM-35V1

3.5" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-10.38%

$189.99

List price $211.99

RV.R1 main

DS18 RV.R1

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

55
RVDVD3.0 main

MB Quart RVDVD3.0

Multi-Zone DVD Receiver with Bluetooth for RV's

1
-10.10%

$257.99

List price $286.99

MB Quart RVM2.0

Multi-Zone Digital Audio Receiver with Bluetooth Audio Streaming for RV's

-10.29%

$156.99

List price $174.99

RVM-10V1 main

MB Quart RVM-10V1

10" Touchscreen Multi-Zone Digital Multimedia Receiver with Bluetooth for RV's

-9.09%

$250.00

List price $275.00


Best selling similar products

DB652 small

Polk Audio DB652 (DB 652)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

(214)

$109.00

List price $119.99

DB402 small

Polk Audio DB402 (DB 402)

• 135 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

(35)

$90.00

List price $99.99

DB462 small

Polk Audio DB462 (DB 462)

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

(17)

$90.00

List price $99.99

MM652 small

Polk Audio MM652 (MM 652)

• 300 watts Peak Each, 100 watts RMS Each
• IP56 marine certified, with weep holes for proper drainage
• 1" Terylene Dome pivoting tweeters
• Titanium Coated Composite cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

(62)

$179.00

List price $249.00

DB522 small

Polk Audio DB522 (DB 522)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• UV-tolerant Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

(68)

$100.00

List price $109.99

DB6502 small

Polk Audio DB6502 (DB 6502)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

(115)

$200.00

List price $209.99

51PSC654 small

Kicker PSC65 (51PSC654)

• 120 watts Peak Each, 60 watts RMS Each
• 3/4" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92.5 dB

$159.96

List price $219.99

DB5252 small

Polk Audio DB5252 (DB 5252)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" dual Silk Dome tweeters
• UV-Resistant Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

(25)

$200.00

List price $209.99

MP694 small

Diamond Audio MP694

• 300 watts Peak Each, 150 watts RMS Each
• 1" Horn tweeters
• Impedance: 4 ohm
• Sensitivity: 101 dB

$549.99

List price $539.99

PS65C small

MTX PS65C

• 170 watts Peak Each, 85 watts RMS Each
• Dual Teteron Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB
• Mounting Depth: 2-1/2"

$199.96

List price $219.95

Specifications & Details


Speaker Specifications
Series
Polk MM Series
Priced Per
Pair
Number of Speakers
2
Speaker Size
6-1/2"
Design
2-way Coaxial
Tweeter Design
Dome
Tweeter Composition
Silk-Polymer Composite
Woofer Composition
Woven Glass Fiber
Woofer Surround
Butyl Rubber
Peak Power Handling
200 watts
RMS Power Handling
100 watts
Sensitivity
92 dB
Frequency Response
40 - 25000 Hz
Impedance (Per Voice Coil)
3 ohm
Shallow Mount Installation
Yes
Top-Mount Depth (Mounting Depth)
2-5/8"
Bottom-Mount Depth
2-7/8"
Cutout Dimensions
5-1/16 x 5-1/16 
General specifications
Speaker Grilles
Yes
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

MM651UM-Black

Weight:

6.00lbs

Internal SKU:

mm651um-oeblack

Internal Product ID:

112435

Product and How-to Videos


  • How To Test Speaker Polarity | Tips & Demo | Car Audio 101
  • Replace your Car Speakers and Upgrade to Better Sound | Sonic Electronix

Customer Ratings & Reviews


Polk Audio MM651UM Special Edition Black thumbnail image

5 star
84%
4 star
12%
3 star
0%
2 star
4%
1 star
0%



Durability
4.7
Value
4.7
Features
4.7
Design
4.8
Usability
4.8

Customer Reviews

Sort by:

Loading...

Awesome Speakers!

The following review is for a previous version (MM651UM).

I ordered these to install on the swim deck of my AR230 Yamaha boat. They sound amazing! Water rushes over them and drowns them every single time the boat stops and they have never skipped a beat. No disappointments.

By Scott on January 11, 2012

88 found this helpful


Great Sound, Smooth and Balance, Durable, Candy for the Ears!

The following review is for a previous version (MM651UM).

These are great sounding speakers! I am very picky on audio and visual. I used these speakers on the outside of my toyhauler. The sound is superb with great bass and clear highs. Overall tonal balance is natural and smooth. People and friends tell me how nice the music sounds and I have to agree! I really enjoy listening to music in camp as long as the surrounding area is quiet. These speakers would also fit a boat nicely as well. I would even put them in a car but you are overpaying for the Ultra Marine qualities. I wash my RV after every trip and the speakers hold up well to water spray(I try and avoid direct hose streams). They also hold up well to wind as the speakers see freeway speeds while towing. If you need a durable speaker with awesome sound quality then look no further! If you are strictly into sound quality competition then you probably need separates which would provide minimal gains in SQ. I have them hooked up to a Soundstream Rubicon amp but they sounded impressive playing off the Pioneer Premier head unit as well! I highly recommend them for a marine environment or exposure to outdoors.

By TheMofo on March 8, 2010

80 found this helpful


Great product!!!!

The following review is for a previous version (MM651UM).

These speakers are a really great buy, sound great and look great
Strongly suggestion buying these. I plan on buying another pair. The guys at Sonic Electronic were very helpful and order was received very quickly
Thanks again

By Jason on May 19, 2014

77 found this helpful


Pok Audio MM651UM Marine Speakers

The following review is for a previous version (MM651UM).

I purchased these as upgrades to the stock speakers in my boat. These are exposed to the elements on every outing. I am actually overdriving these speakers with more power than recommended so as to have the headroom for a clean, undistorted sound from my amp. And these speakers handle it beautifully. They have a remarkable low end for their size and as I adjust the crossover on my amp, the speakers do not seem to have a dead spot. So much so that I have adjusted my crossover to accommodate the sweet spot of my Kickers because these Polks can handle the full range. I wish the grill offered a little more protection but it would do so at the expense of sound quality so I'm very happy with these!

By lowtones on September 17, 2013

77 found this helpful


Great sound. Good value

The following review is for a previous version (MM651UM).

I replaced two old speakers on my center console Carolina Skiff. They are exposed to slot of weather and hold up very well. The sound is excellent. Very deep base and no distortion. I would highly recommend them.

By Crabman on December 2, 2010

78 found this helpful


Great speakers

The following review is for a previous version (MM651UM).

These are true marine speakers. The silk dome tweeter keeps the treble very smooth yet detailed. The bass is better than the WetSounds speakers I compared them to. Feed them with plenty of the highest quality watts you can afford and you will be richly rewarded. At the price Sonic sells them for, this purchase is a no brainer.

By skyskier on September 12, 2010

78 found this helpful


Excellent Marine Speakers

The following review is for a previous version (MM651UM).

I replaced the four outside original Clarion speakers in my Sea Ray 33 foot 330 Sundancer with the Polk Audio MM651UM speakers. They fit in the existing openings and only required re-drilling for the mounting screws. The sound is excellent. I am not an audio snob but I do appreciate good quality sound and I am extremely happy with these speakers. I investigated the DXi650 model speakers and was very disappointed with the sound quality from them. I highly recommend spending the extra money on the MM series as they sound much, much better and they are completely water proof. The only negative I can find is that the speaker grill leaves much of the cone exposed. If you have young children that might poke their finger into the speaker or if the speakers will be mounted in an active area where something might puncture the speaker then that might be an issue. Otherwise, they are great. You will not be disappointed with the sound and you cannot beat Sonic Electronix price either. They are a great deal through this vendor.

By Bob on January 19, 2011

74 found this helpful


Satisfied

The following review is for a previous version (MM651UM).

I upgraded the stock radio and speakers in my boat with a pair of Polk MM651UM speakers. I chose this pair based on size, power rating to match the new stereo unit, and assumed quality. I am sure they could provide extra kick if I installed an amp but they do just fine without and I dont want to add anymore load to the electrical system. I am satisfied with the look, power, and sound that I get from these speakers, they sound great.

By gds on December 9, 2010

75 found this helpful


Excellent sound and low end range

The following review is for a previous version (MM651UM).

I highly recommend these speakers as they sound wonderful with a great low end punch. I bought these for my boat and will be buying 2 more pair to put in my car. Great value and incredible sound.

By Thurston, III on October 18, 2009

73 found this helpful


Great quality!

The following review is for a previous version (MM651UM).

These look good, and sound amazing. Add an amp to them and you'll be even more impressed.

By Boat Boy on January 3, 2012

71 found this helpful




SA68 main

Scosche SA68

• The SA68 speaker adapters fit most aftermarket 5 1/4" and 6 1/2" speakers into a 6" x 8" factory opening
• Compatible with select 1950-2025 vehicles from Ford, Mercury, Mazda Vehicles

(39)

$7.99

List price $14.99

82-5600 main

Metra 82-5600

• 5 1/4" / 6-1/2 Component/Coaxial Speaker to 6" x 8" Adapter
• Works with 6.5" Speakers
• Installs in 5x7" and 6x8" Locations
• Compatible with select 1981-2017 vehicles from Mercury, Mazda, Lincoln Vehicles

(3)

$15.99

List price $17.99

82-6901 main

Metra 82-6901

• Speaker adapter for select 1977-2024 vehicles from Dodge, Chevrolet, Chrysler
• For the installation of 5.25” or 6.5” speakers
• One pair of adapters included in each package

(39)

$14.99

List price $22.99


BP5.0HD_BP5.0WPH_BP5.0GPS small

Blaupunkt BP5.0HD Combination Dash Cam and Waterproof Action Camera with GPS

HD WiFi Digital Video Recorder and Action Cam + Waterproof Housing + GPS Dongle Combo

(5)

$84.97

List price $449.97

BP7.0HD small

Blaupunkt BP7.0HD Full HD Dash Cam and DVR

Full HD Digital Video Dash Cam Recorder

(1)

$59.99

List price $349.99

PXDX small

iSimple AuxBox (PXDX)

iSimple Factory Auxiliary Audio Input Interface

(23)

$79.99

List price $79.95

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2018 Kia Forte

1998 Dodge Grand Caravan

2016 Acura MDX

2020 GMC Sierra 2500 HD

2020 Chrysler 300

2013 Aston Martin DB9

2008 Ford Crown Victoria

1993 GMC C3500

1987 Cadillac Brougham

1981 Oldsmobile Ninety Eight Regency

Vehicle
Store
Delete

1960 Harley Davidson FLH Electra Glide

2018 Harley Davidson FLHTCU Electra Glide Ultra Classic

Vehicle
Store
Delete

2015 Can-Am Commander E XT

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.