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Polk Audio db651 (OPEN BOX COMPETE)

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

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Polk Audio db651 (OPEN BOX COMPETE)

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


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This is an Open Box Item

We have checked, tested, and confirmed this item to function properly. It contains all the same parts as a new unit, but shows some visible signs of use.
This open box product has a 30-day return policy and a 90-day warranty

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

Polk Audio Store

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.

Item Condition: Open Box Complete

  • Item has been used, and inner package damage.
  • 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
    • 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
    • 4 ohm Impedance
    • 90-Day warranty

    Priced Per Pair

    Speaker Specifications

    This is the manufacturer product line of speakers.
    db (Polk)
    Priced Per
    Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
    Speaker Size
    Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
    6-1/2" (also mounts in 6-3/4" w/ included brackets)
    The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
    Tweeter Design
    Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
    Tweeter Composition
    Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

    PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

    Silk-Polymer Composite
    Woofer Composition
    Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
    Mica Injected Polypropylene (MIPP)
    Woofer Surround
    A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
    Butyl Rubber
    Peak Power Handling
    Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
    180 watts
    RMS Power Handling
    The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
    60 watts
    An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
    Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
    92 dB
    Frequency Response
    The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
    35 - 22000 Hz
    Impedance (Per Voice Coil)
    The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
    4 ohms
    Shallow Mount Installation
    This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

    Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

    Top-Mount Depth
    The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
    Bottom-Mount Depth
    The depth when installed from the bottom of the mounting surface. Measured from the bottom of the speaker's magnet to the top of the mounting holes on the rim of the speaker.
    Cutout Dimensions
    Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
    Hi-Res Audio Compatible
    This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.
    Speaker Grilles
    A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
    Number of Speakers
    This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

    Please refer to the product image and description for further details about the speaker.

    Specials with this Item

    Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

    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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    Average Attribution Rating

    Accessory Tools and Products

    Accessories added

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    You need speaker wire to connect your speakers!

    Your Price $36.99

    Car Stereo and Speaker Installation Tool Kit

    Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

    Your Price $20.99

    NVX XTGSP2 Tone Generator and Speaker Polarity Tester

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    Your Price $19.99

    Xscorpion WDCR2 Window and Door Clip Remover

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    Your Price $8.99

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    Your Price $7.99

    Encore Universal Four Door Power Door Lock Kit

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    Your Price $29.99

    NVX SDSK2 Speaker Kit

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    Your Price $14.99

    Stinger Roadkill Speaker Kit

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    Your Price $10.99

    NVX Sound Dampening Rubber Roller

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    Your Price $7.99

    Browse 13 questions and 83 answers
    Hide answersShow all answers | Sort by
    Why did you choose this?
    Sonic Electronix Store
    they are awsome.
    Michael R on Mar 26, 2017
    Polk well known quality!
    mark t on Feb 25, 2017
    Bought another pair last year, very happy with the quality of sound and product overall.
    c g on Mar 10, 2017
    great product for the price
    jason w on Feb 15, 2017
    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
    · Add Answer · I Have This Question Too (8)
    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
    · Add Answer · I Have This Question Too (7)
    what is the outside measurement of the grill ?
    brad k on May 7, 2015
    · Add Answer · I Have This Question Too (3)
    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
    · Add Answer · I Have This Question Too (1)
    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
    · Add Answer · I Have This Question Too (0)
    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
    · Add Answer · I Have This Question Too (0)
    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
    · Add Answer · I Have This Question Too (0)
    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
    · Add Answer · I Have This Question Too (0)
    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
    · Add Answer · I Have This Question Too (0)
    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)

    Product Summary


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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 (OPEN BOX COMPETE)

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