Contact us
Close contact box
Connect ID #
980 004 941 3

Call center hours

Connect ID #
980 004 941 3
Chat
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

We're sorry, chat is not available at this time. Please visit our Support page to find the help you need.

Please enter your name.  
Please enter a valid email address. Why is this required?
Please enter your US phone number.  

For Tech Support, call 1-800-955-9091

Thank you, !
Our conversation will be emailed to
Please enter a question  
Please select an email topic.  

Looking for tech support?
Please call us at 1-800-955-9091

Need help now?
Call an advisor: 1-888-955-6000

Please enter your name.  
Please enter your US phone number.  
Please enter an email.  
Please enter an email.  
Please enter a message  

Calls may be recorded for training and quality control purposes.

Crutchfield call centers are located in Virginia USA.

Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  
Please enter a message  

Calls may be recorded for training and quality control purposes.

Crutchfield call centers are located in Virginia USA.

Polk Audio MM691

6"x9" 3-way car speakers

Item # 107MM691

Polk Audio continues its tradition of making brilliant-sounding speakers in stylishly designed packages —...

Find what Fits your car

Polk Audio continues its tradition of making brilliant-sounding speakers in stylishly designed packages —...

Ember
Need help?
Contact our Virginia-based experts.
Discontinued item
2 questions - 8 answers

Item # 107MM691

Ember
Need help?
Contact our Virginia-based experts.

About the Polk Audio MM691

Polk Audio continues its tradition of making brilliant-sounding speakers in stylishly designed packages — their Mobile Monitor (MM) Series speakers look great and sound even better. Each speaker utilizes an extra-strong, extra-small neodymium magnet that saves space and weight, allowing these speakers to fit into more places in more vehicles while still delivering a full sound with lots of kick. Their lightweight carbon composite frames provide strong, flex-free support for the speakers' motor assemblies.

Polk Audio continues its tradition of making brilliant-sounding speakers in stylishly designed packages — their Mobile Monitor (MM) Series speakers look great and sound even better. Each speaker utilizes an extra-strong, extra-small neodymium magnet that saves space and weight, allowing these speakers to fit into more places in more vehicles while still delivering a full sound with lots of kick. Their lightweight carbon composite frames provide strong, flex-free support for the speakers' motor assemblies.

The Polk MM691 6"x9" speakers feature honeycomb-textured woven glass fiber composite woofer cones that respond very quickly for a clean, crisp, and powerful sound. Large voice coils — over an inch in diameter — give the speaker high power handling capability and extended reliability.

3/4" and 1" silk dome tweeters add a sweet high end that blends perfectly with the low notes so your music stays in harmonic balance, from the electric bass all the way on up to the cymbals.

Important Note: These Polk speakers use a low-impedance design to pull more power safely from your car stereo or amplifier. This design is compatible with virtually all factory and aftermarket stereos.

Priced per pair

READ LESS

Product highlights:

  • 6"x9" 3-way speakers (pair)
  • woven honeycomb glass fiber composite woofer cone with butyl rubber surround
  • 1" and 3/4" silk composite dome tweeters
  • certified for marine use
  • 2.7-ohm impedance for extra power (compatible with virtually all factory or aftermarket car stereos)
  • power range: 15-125 watts RMS (300 watts peak power)
  • frequency response: 30-25,000 Hz
  • sensitivity: 94 dB @ 1 V
  • top-mount depth: 3-3/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # AA2691-A

What's in the box:

  • Two 3-way speakers
  • 2 Grilles
  • 2 Passive crossovers
  • 8 Mounting screws
  • 8 Speed clips
  • Owner's Manual
  • Product Registration information sheet

Customer reviews

Loading reviews...

Polk Audio MM691 reviews

Average review:

24 reviews

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee purchase (What's this?)

Pros:

Cons:

Crutchfield response

<< >>

More details on the Polk Audio MM691

Pat M.

Features & specs

General
Speaker Size 6X9
Design 3-way
Tweeter Design 3/4" Soft dome
Impedance (Ohms) 2.7
Tweeter Composition Silk/Polymer composite
Woofer Composition Glass Fiber Composite
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) 94
Sensitivity at 2.83 volts N/A
Frequency Response 30 - 25k Hz
Minimum RMS Wattage 15
Maximum RMS Wattage 125
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 3 3/16
Bottom-mount Depth (Inches) 3 1/2
Cutout Diameter or Length (inches) 0
Mounting Height (Inches) 1.1175

Product Research

Features

Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.

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

Butyl Rubber Surrounds: For a smoother response and improved durability, the woofers use butyl rubber surrounds. The airtight rubber surrounds stand up to moisture, sunlight and extreme temperatures while allowing long excursion linear motion and years of reliable use.

Silk/Polymer Composite Tweeter and Super Tweeter: The speakers feature 1" liquid-cooled, silk/polymer composite tweeters and 3/4" liquid-cooled, silk/polymer composite super-tweeters for clearer, more accurate mids and highs.

Neodymium Magnets: The speaker's neodymium magnets offer exceptional strength to performance ratio and are extremely lightweight.

Large Diameter Voice Coils: Large diameter, 30mm voice coils increase the speaker's reliability and power handling capacity.

Carbon Composite Basket: The speaker's carbon composite basket is lightweight and will not flex during music audio peaks.

Crossover: The speaker comes supplied with two separate 2-way crossovers; one for each speaker. Each crossover input 36" lead is terminated with tinned wire, and the two 20" output leads (one for the woofer and one for the tweeter) are terminated with female quick-slides. The positive woofer lead has a 0.250" female quick-slide and the negative woofer lead has a 0.187" female quick-slide. The positive tweeter lead has a 0.187" female quick-slide and the negative tweeter lead has a 0.110" female quick-slide. These quick-slides connect directly to the woofer and tweeter terminals on each speaker. The separate 2-way crossover network sends the appropriate frequencies to each driver for cleaner sound and better imaging. Dimensions: width = 3.515", height = 1.015", depth = 2.555"

Grilles: Strong ABS plastic grilles are included. These computer optimized grilles feature a spoke-wheel design.

Marine Certified Woofer: Polk MM Series speakers are built to withstand exposure to moisture and UV rays, so they work well in boats and cars. They also include stainless mounting hardware for corrosion and rust resistance.

Loading accessories...

Customer Q&A

2 questions already asked

Q
Are these Polk Audio MM691 6"x9" 3-way car speakers speakers marine grade? Would they hold up to harsh environment of being on the deck of a Pontoon Boat?
[ Benjamin  May 18, 2016 ]
7 answers
A
I would not recommend this application.
[ Mark  May 20, 2016 ]
A
The Polk mm691 speakers are marine certified and sound great. They do require a lot of power. I have these paired with mm651 and a ppi 900.4 amp they sound great and get really loud. The Polk mm651 um are one of the highest rated marine speakers on the market.
[ William  May 20, 2016 ]
A
Not sure how they hold up to salt water and the weather conditions but I put them on the motorcycle and they held up in the rain and they sound awesome
[ robert  May 20, 2016 ]
A
I'm not sure about boats but bought them for my car they are ok Sound is satisfactory
[ RICHARD A  May 19, 2016 ]
A
I'd probably go with polyplaners. The Polks are great but I don't think they would stand up to long with a constant barrage ow water.
[ David john  May 19, 2016 ]
A
I just bought them for mine.. I've head nothing but good things about them
[ Michael  May 19, 2016 ]
A
I put them on my motorcycle and they are OK... I probably would not purchase them again because they clip fairly easily.
[ Jesse Felix  May 18, 2016 ]
Q
I am installing two mm691 and two mm651 speakers in my boat and powering them with a polk pa d4000.4 amp. Since these speakers are equipped with crossovers do I set the amp to full range or is there a better setting for this setup?
[ William  Apr 21, 2016 ]
1 answer
A
The included crossovers are passive (meaning they filter the frequencies post-amplification) so in most cases you'd want to leave your amp set for full-range output and allow the Polk crossovers to filter the highs to the tweeter and lows to the woofers. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=159
[ Larry  Apr 22, 2016 ]  Staff

Loading articles...

TOP