Polk Audio AA2652-A MM651UM Coax Ultra Marine Speaker

Polk Audio AA2652-A MM651UM Marine Speaker Review

Well, the summer is just around the corner, and that means the boat owners are preparing their boats for the sea or lake. They have, like, a million things to do before they can sail and relax on the water, whether that is with their loved ones oron their own. However, one of thethingsthey need to do is to bring the music to the boat. And for that, they will need to buy a good marine speaker that delivers good music and at the same timecan resist the elements. One of these good marine speakers is Polk Audio Ultra Marine Speaker. In this article, we want to show you what this amazing speaker has for you and help you decide if this marine speaker is the thing your boat and you need.

Click Here to See Our List of the Best Marine Speakers.


Polk Audio is the well-known name in the audio industry, and as such, it is no wonder that it makes the speakers with unparalleled performance. The MM651UM speaker is no exception. This speaker is one of the best that money can buy, as it delivers the superior sound on the water. A 1-inch soft dome tweeter, a grille, plenty of power, 4Ohms, and 40 – 25 000 Hz frequency range mean that the sound is clear, rich and without distortion.

Moreover, the speaker will handle all the challenges that the open sea offers, from UV rays to fog, to the salt, to the rain, as it has a completely sealed front design and is built with durability in mind.

What makes this speaker stand out from the crowd is testing. That Polk Audio really cares about what it brings to the customers shows the fact that this speaker had to undergo a series of tests for durability and resistance. That means that you won’t have to worry if this speaker is a valuable investment because it really is.


  • Weight: 4.4 pounds
  • Dimensions: 6.7 x 5.9 x 3.1 inches
  • Completely sealed front design
  • Size: 6.5 inches
  • Design: 2-way
  • Power Handling: Peak 200watts
  • RMS 100 watts
  • Sensitivity: 92 dB
  • Frequency range: 40 – 25 000 Hz
  • Impedance: 4 Ohms
  • Mount Depth: 2-5/8 inches

Design and Sound

The Design and sound go hand in hand, which is why we put them into the same section.Not only this unit is durable but it also delivers top-notch sound.

The MM651UM speaker excels in durability and resistance, so will last you for years. This is because this speaker underwent many resistance and durability tests such as 600 hours of UV rays, salt and fog testing of the D4329-99 standards as well as of the ASTM International B117-03standards.

Not only that but also this speaker features high-quality parts. First, it features a woven glass fiber composite woofer cone that makes sure the sound is crisp and rich, by way of eliminating unwanted resonances. In addition, the speaker has a large diameter voice coil in order to withstand a huge amount of power. Steel Input Terminals also contribute to thedurability of the unit, as they won’t corrode. Thanks to a 1-inch soft dome tweeter, the highs will be deep and precise. Also, the tweeter features swivel mount to ensure better sound dispersion. All this means that you will hear the music clearly, even when your boat is at the high speed and the wind is blowing.

Since the speaker has a completely sealed front design, it will prevent the water from getting inside the unit and damaging it. But, this speaker is not waterproof, so don’t try to be a smart guy and submerge it in the water.

This is a2-way speaker, which means it delivers both lows and highs. When it comes to the power handling, the Peak power is 200 watts, while RMS is 100 watts. This means that your speaker is capable of handling a big amount of power, compared to other marine speakers on the market.

Frequency range is 40 – 25, 000 Hz, and impedance is 4 Ohms, so you won’t have any difficulty to hear highs, lows, and mids and enjoy the top notch sound that this unit offers. Whether you want to listen to jazz, pop, rock, or country music, you will love the sound quality. On the other hand, a slight concern is that this unit won’t perform as great at the maximum volume. So, you probably want to listen to it at 80% of volume.

We love the simple yet powerful look of the MM651UM. The combination of white and black make the speaker attention grabbing, so everyone on the boat will notice it. This speaker will complement the look of your boat, whereas the sound will fill the boat with rich and accurate tones.


When it comes to installing this speaker, you can place it wherever it suits you best, thanks to its practical size. However, do keep in mind that you might need to drill additional holes, depending on the location where you plan to mount the speaker.


As for the price, this unit has a hefty price tag. However, when we take into account all that it has to offer, we can see why that is so. Therefore, if you are looking to buy a top notch speaker that has all you need, and don’t mind spending a lot of money on it, this is the way to go.


  • Extremely durable
  • Sturdy
  • Crisp, clear, and accurate sound
  • Simple and cool design
  • Easy installation
  • 2-way design


  • Price
  • Don’t listen to music on the maximum volume because the sound quality will be poor

The Final Word

Well, that’s it. Now that you’ve gone through this in-depth review, you are ready to make a decision on whether or not this speaker is the thing you need. We think this unit is a worthy investment, as it considered one of the best marine speakers, so you just can’t go wrong with it.

Overall, this model is a good choice for those who want a top-notch sound and durable speaker, so as to enjoy the years of powerful sound on their boat.

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