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Polk Audio db651 6.5" Speakers

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

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Arrives by Thursday, Jan. 19 to zip 20147

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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
  • 90 Day Sonic Electronix Warranty

Priced Per Pair


Second Depth
The second depth is used only when the box is slanted or angled. This value is the top measurement and it is measured in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.
The height of the item, measured from top to bottom, in inches.
The width of the item from left to right (side-to-side) measured in inches.
Color of handle.

Warranty and Return Policy

Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

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1 Star

Average Attribution Rating

Browse 13 questions and 83 answers
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Why did you choose this?
Sonic Electronix Store
Replacement for oem speakers that were blown. These got very good reviews so giving them a try.
GERALD A on Dec 12, 2016
good product as I've used this brand in the past.
None on Nov 30, 2016
Replacement for db650
Russell G on Dec 8, 2016
Reviews and quality of product
David H on Nov 30, 2016
Should I use this amp with aftermarket head unit Kenwood KMR-M315BT 22 watts rms,50 watts peak 4 channel? Speakers -(2) front Polk DB651 60watts rms 180 peak 4ohm (2) hog tunes 112.2 50 watts rms 100 watts peak 4-8 ohm. If so What is the best performance wiring High level or RCA low level? Looking for loud and clear if possible. Install is
Harley Bat wing Fairing. Thanks for any help!!!!
John W on May 16, 2016
Polk Audio db651
Polk Audio db651
Clarion XC1410
Clarion XC1410
Kenwood KMR-M315BT
Kenwood KMR-M315BT
Best Answer: Always go by rms not peak. Matching your speakers rms to your amp output should get better results
Reply · Report · Mike S on Sep 13, 2016
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what is the cut out size to mount these speakers polk db 651?
brad k on May 3, 2015
Best Answer: 5.0". Detailed specs can be found on the polk audio website.
Reply · Report · David B on May 22, 2016
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what is the outside measurement of the grill ?
brad k on May 7, 2015
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Do they come in gold or are they just silver?
Jose White on Nov 10, 2015
Polk Audio db651
Polk Audio db651
Polk Audio db691
Polk Audio db691
Best Answer: The 651 has a silver spoked grill as you see. There is a silver ring on the center tweet There are hydrodipping kits out there, so you could dip the grill's in gold flake or whatever color you choose. Very good speakers, They last pretty good, to all ranges of music. Please don't discontinue these PA,,,keep on them Sonic E. I don't like talking about these on here,,because everyone scoops them up then,,dammit. Ha. Have a good one.
Reply · Report · Keith H on Nov 10, 2015
· Add Answer · I Have This Question Too (2)
installing 6 polk audio db651 4 in front 2 in the rear of my harley. what would be a good choice for an amp and how to hook it up?
Nic H on Oct 25, 2015
Best Answer: I installed lower fairings on my 03 Road King and installed these speakers. I run an Alpine KTP 445U inside my left bag. They fit real nice between the contours. Also run a Rock Box on my handlebars to control the music. I get lots of compliments.
Reply · Report · Tom A on Nov 14, 2015
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Will this speaker can give decent output by my factory stereo?
gaurav on Sep 4, 2016
Best Answer: With any aftermarket speakers it is best to upgrade your head unit or to use an amplifier with them. Preferably both. I have 4 of these in my truck and before I hooked them up to a 4 channel amplifier the sound would start to get pretty distorted as I turned the volume up especially in the highs. And in general without an amplifier the mid-bass was lacking quite a bit. If you don't plan to use an amplifier or upgrade your head unit then I would recommend getting component speakers. You will get a little less distortion and a little more mid-bass. Although it still won't be anywhere near it's full potential and I can not promise it will sound very good at high volume as that just depends on the DAC your factory head unit has in it and how many Watts your factory head unit puts out to each speaker channel. And you will be significantly under powering any speakers with a factory head unit and no amplifier. But for what they are these are pretty good speakers for the price. For this price range you can't really beat the sound quality and output.
Reply (1) · Report · waylon s on Sep 4, 2016
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will I need a spacer for a 2001 gmc Sonoma?
freddie s on Aug 4, 2015
Best Answer: I don't know about the sonoma. My application was 2004 silverado and it did not require any spacers. The speakers were shallow enough they did not interfere with anything behind them
Reply · Report · Geoff on Aug 17, 2015
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Would like to know if these are ok for install into a 2008 Honda Goldwing GL1800.....?? Maybe speaker suggestion as well!!! Considering the Polk 501, or 651 or 651s units???
Daniel L on Oct 17, 2014
Polk Audio db651
Polk Audio db651
Bazooka MC-HON-AMK
Bazooka MC-HON-AMK
Polk Audio db651s
Polk Audio db651s
Best Answer: Great addition to my bike/trike sound system, having it in an enclosed area limits some of the thump (not much). I also upgraded the speakers to Polk marine speakers, sounds great. One thing to remember, it is open air sound, more watts more sound.
Reply · Report · lazar j on Oct 18, 2014
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In description of Polk db 651 the "cut out dimension" is 5" ". Is this the size hole it will need for mounting purposes and no bigger??
ricky g on May 22, 2016
Best Answer: Yes, that is correct.
Reply · Report · David B on May 22, 2016
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What is the difference between db652 and db651s?
A shopper on Dec 16, 2014
Best Answer: Hello,

The "s", at the end of db651s , implies it is the SHALLOW MOUNT version of the db Series 6.5" . In the features and specs, you will see 2-5/16" vs 2" , when compared to the db651. In addition, because the db651s is Shallow, it will not travel as far and therefore will not be able to reach as low of a frequency range as that of the db651; which is also seen in the specs - 35hz vs 55hz .
Reply · Report · Sonic Electronix SStaff on Dec 16, 2014
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Will this fit on the doors of my 1994 Toyota pick up?
Leroy M on Jun 28, 2015
· Add Answer · I Have This Question Too (0)

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Polk Audio db651 6.5" Speakers