Expert Service 1-661-257-9993 [Hours]

Polk Audio db691 (OPEN BOX COMPLETE)

6x9" 3-Way dB Series Marine Certified Coaxial Car Speakers

We apologize

This item has been discontinued

Item Added to Cart

Polk Audio db691 (OPEN BOX COMPLETE)

6x9" 3-Way dB Series Marine Certified Coaxial Car Speakers


Keep Shopping

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.


Car Stereo and Speaker Installation Tool Kit

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


NVX SDSK2 Speaker Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!



Don't see the accessory you're looking for?
View all available accessories for the Polk Audio db691 (OPEN BOX COMPLETE).

Get FAST answers from customers ASK a Question See questions answers

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

Exceptional Quality and Versatility

Step up your vehicles audio performance with Polk Audio's revolutionary db691'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 db691'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 installed, used, and has inner package damage
  • Speaker Features:

    • 6" x 9" 3-way Speakers (Marine Certified)
    • Power Handling:
      • Peak: 600 watts per pair / 300 watts each
      • RMS: 200 watts per pair / 100 watts each
    • Impedance: 4 ohms
    • Dynamic Balance polymer/mica composite mineral filled cone is stiff yet lightweight for big sound and little distortion
    • 19mm liquid-cooled silk/polymer composite dome tweeter with neodymium magnet for clear and detailed highs
    • Low-mass 2-Layer 25mm Kapton voice coil former is lightweight for high sound output
    • Multi-hole mounting pattern and shallow depth for easy drop-in installations in most cars
    • ABS Grilles, computer optimized and based on exclusive MOMO designs
    • Durable butyl rubber surround won’t fall apart under the stress of extreme temperatures, sunlight or time
    • Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability
    • Acoustically inert stamped steel basket
    • Flat Spider for faster, longer excursion linear motion
    • Flexible woven tinsel leads sewn directly into Spider for greater reliability
    • Frequency Response: 35-22,000 Hz
    • 1-year 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" x 9"
    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.
    Polymer/Mica Composite
    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.
    300 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.
    100 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".
    93 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.
    8-1/2 x 5-3/4 
    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.


    Warranty and Return Policy

    Parts Warranty Duration
    1 year
    Labor Warranty Duration
    1 year
    Warranty Provider

    Summary of Customer Ratings & Reviews

    Rating Distribution

    5 Star
    4 Star
    3 Star
    2 Star
    1 Star

    Average Attribution Rating

    Accessory Tools and Products

    Accessories added

    NVX 25 ft. of True Spec 12 Gauge Speaker Wire

    100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

    Your Price $39.99

    Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

    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

    Perfect for safely troubleshooting and testing audio systems

    Your Price $19.99

    Belva Five Piece Installer's Panel Removal Tool Kit

    Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

    Your Price $13.99

    Xscorpion WDCR2 Window and Door Clip Remover

    Removes and installs handle and window crank clips.

    Your Price $8.99

    Universal Wire Puller & Grabber

    Running wires has never been easier! This wire puller allows you to run wires through those hard to reach places!

    Your Price $7.99

    Encore Universal Four Door Power Door Lock Kit

    Add Power Door Locking and Unlocking while you have the Door Panels removed

    Your Price $29.99

    NVX SDSK2 Speaker Kit

    Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

    Your Price $14.99

    Stinger Roadkill Speaker Kit

    Use this to eliminate rattle from your speakers!

    Your Price $10.99

    NVX Sound Dampening Rubber Roller

    Install your Sound Dampening with ease using this heavy duty rubber roller!

    Your Price $7.99


    Creates a tight seal around the speaker for enhanced audio quality and imaging.

    Your Price $29.99

    XTC 6" x 9" Foam Speaker Baffles

    Compresses and forms to the shape of most installations and reduces panel vibrations.

    Your Price $9.99

    Atrend 6X9PR

    1 Pair of 6" X 9" Speaker Boxes Made with 3/4" Hardwood MDF

    Your Price $24.95

    Browse 7 questions and 39 answers
    Hide answersShow all answers | Sort by
    Why did you choose this?
    Sonic Electronix Store
    I have bought polk audio's in the past they are excellent
    Larry C on Dec 22, 2016
    Great reviews and the price hit the spot; where bang meets the buck! :-)
    Allan T on Jan 11, 2016
    love the look sturdy build bulky but still plays with finesse
    Theo H on Feb 12, 2016
    Quality, Past ownership.
    David B on Nov 2, 2015
    Do they come in gold or are they just silver?
    Jose White on Nov 10, 2015
    Polk Audio db691
    Polk Audio db691
    Polk Audio DB651
    Polk Audio DB651
    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)
    I want to install these on my Harley, how well do these hold up to weather and vibration?
    Tim L on Apr 19, 2015
    Best Answer: I bought mine to install in the fairing of my Victory Cross Country ... they were way too big! So I ended up installing something else. Not sure where U want to put them on the Harley but that could be a deciding factor.
    Reply · Report · Fred L on Apr 20, 2015
    · Add Answer · I Have This Question Too (0)
    What amp would work best with these?
    Kyle K on Dec 5, 2014
    Best Answer: Do you have another pair of speakers you want to run off the amp, or just these? If it is just these, look for a two channel amp with specs of 100 watts RMS at 4 ohms. If you are looking to get another pair of speakers, look for speakers with the same specs as these, and get a four channel amp.
    Reply · Report · Chris A on Dec 5, 2014
    · Add Answer · I Have This Question Too (0)
    what size amp do i need to run 4 polk audio db691's?
    A shopper on Jul 27, 2015
    Best Answer: Hello,

    Like the description points out, the db691 are asking for 100 watts each @ 4ohms . So , you seek an amplifier that is guessed it... ~100w RMS @ 4ohms. Amplifiers aren't categorized by "sized" when you're looking for one that suits a specific need, so we can't answer your question in the form that it was posed, but can show you a couple examples:

    Pioneer GM-D8604

    Rockford Fosgate Prime R600-4D
    Reply · Report · Rick MStaff on Jul 27, 2015
    · Add Answer · I Have This Question Too (0)
    Will these fit in the front doors of a 2011 Nissan Sentra? I know the spec's call for 6x9's but I do not know the depth tolerance.
    john D on Nov 30, 2014
    Best Answer: Hello John,

    Unfortunately, the db691 will not fit the fronts' depth. The door has roughly 2.25"-2.5" of usable space. The most common solution, is to go with 6.5" Shallow Speakers for the front, utilizing the Scosche SA69 to fill in the space. The matching db Series is the Polk Audio db651s [2" Depth].
    Scosche SA69
    Scosche SA69
    Polk Audio db651s
    Polk Audio db651s
    Reply · Report · Customer SStaff on Nov 30, 2014
    · Add Answer · I Have This Question Too (0)
    Will these fit into my front door of 2011 Chrysler 200?
    A shopper on Sep 29, 2015
    · Add Answer · I Have This Question Too (0)

    Product Summary


    Model Number






    Internal SKU


    Internal Product ID


    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 db691 (OPEN BOX COMPLETE)