6 1/2-inch coaxial marine loudspeaker
6 1/2" coaxial
Designed to Perform
Designed and styled specifically for use in the marine environment, The MM651UM isn’t just car speaker labeled for use on a boat. Used in a speaker can or installed on your boat, it works great for both! A unique tweeter-on-grille design eliminates the traditional tweeter post, resulting in a totally sealed front. With waterproof materials, it will stand up to just about any harsh marine environment while sounding great, thanks to Polk marine certification and Polk technology.
Completely sealed front design prevents water intrusion.
Built-on grille includes tweeter mount which eliminates the traditional tweeter "stalk".
Sealed crossover assembly is built into back of magnet means there’s no need to find room to hide an extra box.
Stainless steel heavy duty input terminals and mounting hardware will not corrode or tarnish.
Passes the most rigorous 600 hours of salt fog and UV testing (ASTM international B117-03 standard practice for operating salt spray (fog) apparatus and D4329-99 standard.
Dynamic Balance® driver technology for pure, distortion free sound.
Neodymium is a rare earth material we use in all MM driver magnets, excluding 461P, that are about 1/10 the weight of a comparable ceramic magnet and much more powerful.
Carbon composite basket based on the spokes of a wheel is lightweight and will not flex.
Woven glass composite cones feature tremendous stiffness-to mass ratio. Lower mass means faster transients and finer detail.
Klippel optimized components for the best possible performance, even at extreme listening levels.
Marine Certified Polk MM Series speakers are built tough to withstand the toughest environments so they are perfect for use in boats of all types. That’s why Correct Craft offers Polk speakers in their award-winning Nautiques ski and wakeboarding boats.
Large-diameter voice coil (30mm) increases reliability and power handling capacity.
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.
|Type||Dynamic Balance weather-resistant silk composite dome|
|Mid / Woofer|
|Diameter||6 1/2" (16.51cm)|
|Type||Dynamic Balance weather resistant poly-composite cone|
|Total Frequency Response||40-25kHz|
|Nominal Impedance||4 ohms|
|Recommended Amplifier Power||15-150 watts per channel|
|Cut-Out Diameter||5 1/16" (12.86cm)|
|Height||1 1/8" (2.86cm)|
|Full-Range Mounting Depth|
|Top Mount||2 5/8" (6.67cm)|
|Driver Mounting Depth|
|Bottom Mount||2 7/8" (7.30cm)|
|Unit of Measure||pair|
|Speaker Warranty||1 year parts and labor (original purchaser)|
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.
4 reviews with an average of 4.5Write your own review
by J Lague, September 10, 2008103 out of 178 people found this review helpful.
All. Easy install, looks and sounds super.Is not a worry when hosing down the boat. Great value.
Changed out factory upgraded speakers in 07 Sea Ray Select. The sound is clean, crisp and clear. Went with four Polk UM coaxials and left stock tweeters. It's more then I expected, and then some. Even Sound Advice techs cant't believe the difference.
by Walt S, January 27, 201135 out of 46 people found this review helpful.
Everything: Sound quality, power handling and build quality.
I wish there was a full grille option for fishing boats or boats that just have small children. Other than that none.
I use the MM series in our demo boat with plenty of power. All I can say is (Very Impressive). These are the best sounding speakers for the money at any price. If you love good music and like hearing your music with full detail these are the way to go. It sounds like I have the full band on board. I use these in a display at boat shows and people are amazed at the sound quality. Aqua Acoustics, Jacksonville, FL
by John, April 24, 201216 out of 21 people found this review helpful.
Great sounding speakers but after one year of having them the foam surround has separated from all 4 of the speakers mounted on my tower. A little disappointing.
Sorry to hear that. The surround is not foam, it's actually rubber, in any case please contact our customer service department (800) 377-7655 as the speaker have a one year warranty.
by Robert, April 26, 20125 out of 5 people found this review helpful.
These sound really great and play well with just head unit power.
I really wish they had standard looking white marine grills that covered the front, similar to JL or Alpine marine speakers. Anything that blends in and can take a kick (fishing boats, sail boats, etc.). Also, it would be better if the connection terminals were near the bottom edge of the speaker basket and not at the rear where they require additional depth and want to get caught on stuff. Would also be great if they had an interior model with simple black grill that blends into interior.
See STRENGTHS and WEAKNESSES below.
MM651 UM Media
MM651 UM Literature
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