Expert Service 1-877-289-7664 [Hours]

Boom. SUBTEMBER is here!

Polk Audio db651

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

In Stock
|

List price $149.99

$69.99

with warranty

You Save: $80.00 (53.34%)

Arrives by Tuesday, Sept. 23 to zip 07095

Add an Extended Warranty

Fast, Free Shipping

Within the US 48

60-Day Money-Back

Hassle Free Returns

Low Price Guarantee

Seen it for less? Click here

365-Day Coverage

Warranty assistance for a year

Will this fit my ride?

Check Vehicle

In Stock

Arrives by Tue, Sept. 23

Get FAST answers from customers ASK a Question See questions answers

Bundled Savings with this Product

=

Get 25% off Sound Dampening Speaker Kit with Purchase!

For a limited time, get 25% off of the NVX SDSK2 Speaker Kit with a qualifying pair of speakers! Sound dampening will eliminate rattles, insulate against heat, and also improve the sound and output of your speakers!

3.75

9111

100

Polk Audio db651

$69.99

+

25% OFF

NVX SDSK2

$14.99

Special Price $11.24 ($14.99 if purchased separately)

NVX SDSK2

• Eliminates Road Noise
• Quiets Vibrations
• Stops Annoying Rattles
• Increases SPL
• Reduces Heat
• Simple To Install
• Peel and Stick Installation
• Two 10" x 10" Pieces

(Offer 1 of 1)

Combined Total Price

$81.23

You Save $3.75

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.

Speaker Features:

  • 6-1/2" / 6-3/4" 2-way Coaxial Speakers (Marine Certified)
  • Power Handling:
    • Peak: 360 watts per pair / 180 watts each
    • RMS: 120 watts per pair / 60 watts each
  • 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
  • 1-Year SonicElectronix.com warranty

Priced Per Pair

Speaker Specifications

Series
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.
Pair
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)
Design
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.
2-way
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.
Dome
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
Sensitivity
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.

Yes
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.
1-5/8"
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.
2-5/16"
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
5"
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.
Yes

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
67%
4 Star
25%
3 Star
6%
2 Star
0%
1 Star
1%

Average Attribution Rating

Durability
4.7
Value
4.7
Features
4.5
Design
4.7
Usability
4.7
Luke

West Des Moines, Iowa

Overall
Durability
Value
Features
Design
Usability
Sastifying Product

October 29, 2010

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.

7 of 7 found this helpful

Help our customers find the most helpful reviews

Brad

Wilsonville, OR

Overall
Durability
Value
Features
Design
Usability
Outragous sound

February 23, 2012

Golden crisp sound rather hitting highs or lows. These polk speakers hit hard an clear! However dont expect bass from these speakers, they arent made for that purpose, but if you also have subs the sound in your car will be perfect. Hope this helps- Brad.

3 of 3 found this helpful

Help our customers find the most helpful reviews

Rich

Buffalo, NY

Overall
Durability
Value
Features
Design
Usability
Smart Buy

January 9, 2012

I have owned these speakers for about 6 months now and found them to be very reliable. They are stock replacements which made them easy to install, and easily handle the extra wattage of my aftermarket headunit. Value wise, I'd say they are well worth it.

3 of 3 found this helpful

Help our customers find the most helpful reviews

josh

shasta lake, CA

Overall
Durability
Value
Features
Design
Usability
GREAT

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.

2 of 2 found this helpful

Help our customers find the most helpful reviews

audio install tech

melbourne, FL

Overall
Durability
Value
Features
Design
Usability
great set of coaxials

June 21, 2011

These Polks we use heavily at our shop, they have a good sound and decent midbass, the perform well with after market head-units/receivers. for best sound thogh a proper component set is always better. Also, Polk Tweeters, though Silk Dome, are notorious for being "harsh" that's not necessarily a bad thing, it's just their sound signature. Hybrid audio makes some great coaxials that are worth every penny, but with any good speaker setup you should amp the speakers.

2 of 2 found this helpful

Help our customers find the most helpful reviews

GARY

Canada

Overall
Durability
Value
Features
Design
Usability
Great Value,SOUNDS PERFECT!

September 17, 2013

Was a direct fit for my 93 GMC Safari van,front dash speakers.No modifications or altering needed at all.

1 of 1 found this helpful

Help our customers find the most helpful reviews

Al

Nc

Overall
Durability
Value
Features
Design
Usability
Great product

August 30, 2014

Product is price well and seems to be very durable. This speaker can handle a lot of punishment. I love it.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Steve

Toledo, OH

Overall
Durability
Value
Features
Design
Usability
Excellent value and sound

August 21, 2014

Very nice sounding speaker for a low budget co ax!

0 of 0 found this helpful

Help our customers find the most helpful reviews

Bo

Calera Al.

Overall
Durability
Value
Features
Design
Usability
Great speakers

July 29, 2014

The Polk audio speakers are a great speaker for the cost!!!

0 of 0 found this helpful

Help our customers find the most helpful reviews

jammer

ypsilanti mi, MI

Overall
Durability
Value
Features
Design
Usability
ok speaker exagerated highs

July 9, 2014

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.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Jammer

ypsilanti mi

Overall
Durability
Value
Features
Design
Usability
kind of tinny sounding

July 9, 2014

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.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Nikki

The Woodlands, TX

Overall
Durability
Value
Features
Design
Usability
What the Doctor ordered...

July 6, 2014

37 coupe. Small cockpit but big sound. In conjunction with a 60 RMS Kenwood amp and an Infinity basslink. iPod as head unit, GLI, volume control knob, and Y splitters into the amp and basslink. Couldn't be happier.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Loy

AUSTIN TX

Overall
Durability
Value
Features
Design
Usability
Polk Audio db651

June 17, 2014

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.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Earl

West Monroe, LA

Overall
Durability
Value
Features
Design
Usability
Polk 6/9 Audio Speakers

April 21, 2014

I ordered the 6/12 speakersfor my Harley. This product is so Awsome, The quality of the speakers,the durability of the product is just amazing, I'm riding at speeds of 75 to 80 miles an hour. It sounds like i'm sitting in den at home listening to my surround sound speakers. Very satisfied. Order actually arrived before delivery date. Completely saitsfied with speakers. I would definetly arder again from this company.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Paul

Elkridge, MD

Overall
Durability
Value
Features
Design
Usability
Great for the price

April 19, 2014

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.

0 of 0 found this helpful

Help our customers find the most helpful reviews

na8t

oxford oh

Overall
Durability
Value
Features
Design
Usability
love them

February 22, 2014

in the top 5 for sum of the best coaxials i have had and at under $75. these are THE BEST your going to find i have a old school v12 75x4 on them and are keeping up with my rf T2d212

0 of 0 found this helpful

Help our customers find the most helpful reviews

Jack

Point Roberts, WA

Overall
Durability
Value
Features
Design
Usability
Loud and clean

January 7, 2014

Bought 2 sets for my sons ski boat, he had clarion prior to these. He has them amped at 80 watts and they sound great. Service from Sonic was fantastic, very fast and exactly what they said.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Jason

thecity, state

Overall
Durability
Value
Features
Design
Usability
Good speakers

December 3, 2013

I bought these for my Audi A6 and they fit perfectly. Running them off an mbquart amp and they outperform the bose audio I had, and I only replaced the front two door speakers. They get loud and have good highs. Get an amp for these.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Larry

Marston, MO

Overall
Durability
Value
Features
Design
Usability
Great speaker

November 14, 2013

What can I say, Polk Audio has maintained great quality through my years of being an audiophile. The db651 is the the best sounding 6.5 speaker out there for the money. Buy it here Sonic electronix!!!!

0 of 0 found this helpful

Help our customers find the most helpful reviews

Michael

Orange, TX

Overall
Durability
Value
Features
Design
Usability
Polk Audio db651

October 17, 2013

I recently bought a second set of these speakers to go in the front of my truck cab. I have to say that for the price they are great. I would recommend them to anyone that wants a clear high end sound without distortion. The tweeter in the middle sticks out a bit more than a normal speaker of this type but that doesn't make the speaker any less great.

0 of 0 found this helpful

Help our customers find the most helpful reviews

Accessory Tools and Products

Accessories added

Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

Your Price $44.95

Belva 23 ft. of True Spec 12 Gauge Speaker Wire

100% Copper Clad Aluminum, high strand count with ultra-flexible PVC blended jacket for easy installation

Your Price $14.99

12-10 AWG Butt Connectors

These yellow butt connectors are ideal when connecting thicker speaker wire your new aftermarket speakers.

Your Price $6.99

12-10 AWG Yellow T-Tap Adapters

Allows for fast and easy splicing of wires by easily tapping into the cable.

Your Price $4.49

12-10 AWG Quick Disconnect Connectors

These yellow quick disconnect connectors make it easy to connect and disconnect speaker wire your to your new aftermarket speakers!

Your Price $6.99

NVX SDSK2 Speaker Kit

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

Your Price $14.99

Dynamat Xtreme Speaker Kit 10415

Enough sound dampening for 2 speakers!

Your Price $17.95

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

Your Price $13.99

Car Stereo and Speaker Installation Tool Kit

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

Your Price $12.99

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 $6.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

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

Your Price $14.99

3 in 1 Wire Quick Splice T-Tap and Butt Connector Crimper + Wire Cutter

Used for cutting copper and aluminum wires up to 8 gauge.

Your Price $21.99

NVX SDRLR1 Sound Dampening Rubber Roller

Install your Sound Dampening with ease! This heavy duty rubber roller is designed specifically to install your NVX products!

Your Price $7.99

Speaker Baffles for your Speakers

Enhance the sound of your speakers with these easy to install speaker baffles.

Your Price $9.99

Items we think you might want
db651s thumbnail
Polk Audio db651s

• Peak Power: 330W
• RMS Power: 110W
• 3/4" Liquid-Cooled Silk / Polymer Composite Dome Tweeter
• Mounting Depth: 1-11/16"
• Lightweight Dynamic Balance Polymer/Mica Composite Mineral Filled Woofer Cone
• 4 Ohms Impedance
• Sensitivity: 92dB

Your Price $64.99

SPS-610 thumbnail
Alpine SPS-610

• Peak Power: 480W
• RMS Power: 160W
• 1" Wide-Range Silk Soft Dome Tweeter
• Mounting Depth: 2-1/4"
• Tuned Poly-Mica Woofer Cone
• 4 Ohms Impedance
• Sensitivity: 88dB

Your Price $64.95

Browse 1 question and 3 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I have used Polk speakers since I purchase Mobile Monitors when they first came out. Excellent sound at a great price.
Frank K on Sep 4, 2014
I have these speakers in the front and they are very good speakers. I needed some for the rear.
Jacob B on Jul 30, 2014
good brand cheap price
Jacob M on Aug 15, 2014

Product Summary

Manufacturer

Model Number

db651

UPC

747192112776

Weight

5.50lbs

Internal SKU

db651

Internal Product ID

9111

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

  • Polk Audio db Series Coaxial and Component Car Speakers
  • How To Check Speaker Polarity Installation Tip
  • Upgrade Your Speakers
  • Sonic Electronix: The X Factor when Shopping Electronics