Polk Audio db651 6.5" dB Series Marine Grade Car Speakers

Polk Audio db651

6.5" / 6.75" 2-Way Marine Certified db Series Car Speakers w/ Liquid Cooled Silk Tweeters

• Peak Power: 360W
• RMS Power: 120W
• 3/4" Liquid-Cooled Silk / Polymer Composite Dome Tweeter
• Mounting Depth: 2-5/16"
• Lightweight Dynamic Balance Polymer/Mica Composite Mineral Filled Woofer Cone
• 4 Ohms Impedance
• Sensitivity: 92dB

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

db652 thumbnail

Polk Audio DB652 DB+ 6.5-inch (DB 652)

OUR PRICE: $89.00

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Polk Audio

Authorized dealer

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

Polk Audio db Series 6-1/2" db651

Exceptional Quality and Versatility

Step up your vehicles audio performance with Polk Audio's revolutionary db651's. Cutting edge technology has allowed for an efficient speaker that has ability to accurately reproduce music like you have never heard before. A precise balance of materials including the Silk/Polymer Dome tweeter and Mica Cone woofer enable smooth roll-off and quick response at any volume. The rubber surround adds to bass response as well as increases the lifetime of the speaker under any conditions. Being marine certified, the Polk DB651's will surprise you with its versatility and ability for use in many applications. The high-efficiency loudspeaker means less power is necessary for the same quality output. The revamped db Series delivers that perfect Polk Audio performance and durability like never before.

General Features:

  • 6-1/2" 2-way Coaxial Speakers (Marine Certified)
  • Power Handling:
    • Peak: 360 watts per pair / 180 watts each
    • RMS: 120 watts per pair / 60 watts each
  • Recommended power range: 10 - 60 watts RMS per channel
  • Will fit most 6-3/4" locations with included speaker bracket
  • Lightweight dynamic balance polymer/mica composite mineral filled cone woofer
  • Marine Certified, perfect for use in marine vessels
  • 3/4" Liquid-Cooled Silk/Polymer composite Dome Tweeter
  • High Pass and Low Pass Crossover Filters
  • Low-mass 2-Layer 25mm Kapton Voice Coil former
  • Multi-Hole Mounting Pattern
  • Shallow mounting depth
  • Muscular ABS Grilles (Based on MOMO Designs)
  • Durable Butyl Rubber Surround
  • Pole Plate Heat Sink
  • Flat Spider for faster, longer excursion linear motion
  • Flexible Woven Leads sewn directly into Spider for greater reliability
  • Polarized Nickel Plated Terminals on PCB terminal board
  • Stamped Steel Basket finished in rustproof Gun Metal Gray
  • Frequency Response: 40 - 22,000 Hz
  • Sensitivity: 92 dB
  • Nominal Impedance: 4 ohms
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Priced Per Pair

Product history:

Polk Audio DB652 thumbnail
(newest, current model)
Polk Audio db651 thumbnail
(previous model, replaced by Polk Audio DB652 DB+ 6.5-inch (DB 652))
Speaker Specifications
db (Polk)
Priced Per
Speaker Size
6-1/2" (also mounts in 6-3/4" w/ included brackets)
Tweeter Design
Tweeter Composition
Silk-Polymer Composite
Woofer Composition
Mica Injected Polypropylene - MIPP
Woofer Surround
Butyl Rubber
Peak Power Handling
180 watts
RMS Power Handling
60 watts
92 dB
Frequency Response
35 - 22000 Hz
Impedance (Per Voice Coil)
4 ohms
Shallow Mount Installation
Top-Mount Depth
Bottom-Mount Depth
Cutout Dimensions
Number of Speakers
General specifications
Marine Certified
Speaker Grilles
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix
  • Polk Audio db Series Coaxial and Component Car Speakers
  • Replace your Car Speakers and Upgrade to Better Sound | Sonic Electronix
  • How To Test Speaker Polarity | Tips & Demo | Car Audio 101
Polk Audio db651

Polk Audio db651



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Overall rating distribution

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By feature average rating



July 9, 2014

ok speaker exagerated highs

I like a flat response in speakers for realistic sound. I record music and reference the mix in my car also. The high boost makes it hard to judge a mix. might be good for some people but just too bright in one high frequency for me.


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October 29, 2010

Sastifying Product

I got the Polk Audio db651 6.5 in speakers. I have a Dodge Dakota Extended Cab and got 2 pairs. I am VERY impressed with the sound clarity and just sheer power of these speakers. Granted it is in a truck cab but these things are extremely loud. They have great clarity at all volume levels and are able to play loud enough to make me yell at my passengers to be heard and they still didn't have any distortion. For $65 a pair they are a steal. I'm only running 22 rms thru my head unit and they can take 60 rms I believe. I highly recommend these speakers to anyone.


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July 9, 2014

kind of tinny sounding

There seems to be one high frequency that is much louder than the rest around the frequency of a hi hat or cymbal. I prefer a flat response.
These speakers have that high boost which colors the sound and doesn't sound real.


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June 17, 2014

Polk Audio db651

I had replaced the Polk Audio db61 door speakers from some kenwood speakers that I ended up blowing. Believe it or not, they sound better!
And for the price you cant beat it anywhere.


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August 21, 2014

Excellent value and sound

Very nice sounding speaker for a low budget co ax!


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September 30, 2014

Awesome product

These Polk speakers are great! I use them in my ice chest radios with no issues whatsoever. I will definetly be purchasing more!!


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August 17, 2011


These speakers were installed in a 20 ft wakeboarding boat and without an amplifier these speakers get loud and clear with no distortion.


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February 13, 2015

Major step up from stock boat speakers

Like others speaker clarity and loudness are great, bass is a little weak. I'm working on a set for my Tundra next.


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November 22, 2011

Incredible speakers (especially for the price)

Great speakers for an even better price. Very well built and sound phenomenal. Offer great highs, good mid, and surprising bass. They shake my truck even when they are barely cranked. I have a 98 GMC Sonoma with a JVC head unit running 18 watts RMS power and the speakers have plenty of power.

My only complaint is that installing the speakers was very difficult. The supplied mounting bracket was nowhere close to the right size for my truck so I had to re-drill mounts and use those horribly tiny mounting brackets they send you. The speakers are also much taller than stock and push on the door panels slightly. Grill did not even begin to fit.

Overall, though, I would recommend these speakers for anything from a stock head unit to a powerful aftermarket head with an amp. They are a major upgrade I should have done years ago. I plan on putting these speakers in every future car I own.


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April 19, 2014

Great for the price

Polk has always been a good brand. With a well adjusted stereo I can get good bass and treble as a two-way speaker is expected. The mids are alright as expected.

Four of these in my truck can provide enough thump to delay my decision on installing a sub. Everything from acoustical, rock, r&b, and whatever sound good. This is coming from an audiophile.


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September 17, 2013

Great Speakers

When my factory radio, cd player died I decided to update my car stereo and purchased a new cd player with bluetooth. I also purchased a new set of speakers the Polk Audio db651. I have polk Audio speakers on my home stereo and that is why I selected these. I am very happy with the purchase. The sound is crisp and clear great for listening to Jazz and all types of music.


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January 1, 2012

Great buy!

Perfect SQ and fit perfect in the Dodge Dakota. Bass sounds better in these too!


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July 7, 2011

Polk Audio db651

Top quality, its the best.. I would buy again
5 overall
5 value
4 look/design
4 durability
4 features
5 ease of use


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September 25, 2010


Bought this speakers 8 months ago and all I could say is wow!! Sound is crystal clear! Big difference from stock speakers. Paired this with a cde-102 a ktp-445 and a sub. You have to hook this to an amp to really appreciate this speakers!


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February 13, 2015

Great value

Great replacement for factory speakers. The sensitivity and response of these speakers with the factory headunit was great.


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