Polk Audio DXi651 (DXi 651) db651 inspired Car/Marine/ATV Speakers

6-1/2" DXi Series 2-way Coaxial Car Speakers - Also Marine Certified for Boat/ATV/Motorcycles!

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Polk Audio DXi651 (DXi 651) db651 inspired Car/Marine/ATV Speakers

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Polk Audio Store

Polk Audio DXi651: Clean and Precise Sound


Polk Audio DXi651 Car Speaker


Klippel Motor Optimization:

The DXi651 is made with laser measurement technology via the Klippel Motor Optimization for a smooth excursion path at any volume. This creates a more efficient and long lasting speaker that performs great at low or high volumes.





Polk Audio DXi651 Car Speaker


Proprietary Dynamic Balance Technology:

Polk's engineers are able to design out driver and system resonances that cause distortion with the Dynamic Balance technology. The composite cones also feature a stiffness-to-mass ratio that allows the speakers to react to faster transients with finer detail. You not only get clarity, but function and precision.







General Features:

  • 6 1/2" DXi Series 2-way Coaxial Car Speakers
  • Comes with 6 3/4" adaptor rings for easy fit in VWs, Audis, BMWs and other European cars
  • Power Handling:
    • Peak: 360 watts per pair / 180 watts each
    • RMS: 120 watts per pair / 60 watts each
  • Recommended Power Range: 4 - 60 watts RMS per channel
  • Dynamic Balance polypropylene cone
  • Butyl Rubber surround
  • 3/4" (19mm) swivel-mount aluminum dome tweeter
  • Top-mount Depth: 2"
  • Cutout Dimensions: 5"
  • 4 ohm impedance
  • Frequency Response: 35Hz-22kHz
  • Sensitivity: 92dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Per Pair

Check out the DXi651 Owner's Manual



Product History:

Polk Audio DXi651 thumbnail
(newest, current model)
JBL GTO628 thumbnail
(previous model, replaced by Polk Audio DXi651 (DXi 651) db651 inspired Car/Marine/ATV Speakers)
JBL GTO627 thumbnail
(previous model, replaced by JBL GTO628)

Speaker Specifications

Series
This is the manufacturer product line of speakers.
DXi (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"
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 Size
Refers to the size of the tweeter. Typically, smaller tweeters produces less output with higher frequency response.
3/4"
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.

Aluminum
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.
Dynamic Balanced polypropylene
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
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.
2"
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches, required to contain the speaker.
5"

Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
71%
4 Star
29%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.7
Value
4.9
Features
4.7
Design
4.7
Usability
4.7
Jeff

Billings MT

Overall
Durability
Value
Features
Design
Usability
Very good sound

June 11, 2017

Purchased these speakers to replace a set of worn our speakers in my 99 Tahoe. These were of considerably better quality than the originals and installed nicely in place of the originals. These speakers have a significantly improved base response over the stock speakers. and do not distort when driven by the stock amp in the Tahoe. This was a good solution for a replacement speaker that made a good sound system even better.

0 of 0 found this helpful

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gator

va bch. va

Overall
Durability
Value
Features
Design
Usability
great value

May 21, 2017

I have put this speaker in about cars now some just as stock upgrades and others powered by amp. sound is great either way. I have a set of them on a golfcart and they sound amazing. would buy again

0 of 0 found this helpful

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Dwight

Canada

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Good speakers

April 6, 2017

I bought these by looking at the specs I needed. 35 - 22000 Hz, Sensitivity: 92dB, They sound great and loud.

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Anthony

North Charleston, SC

Overall
Durability
Value
Features
Design
Usability
Decent

March 29, 2017

Sound good but aren't super loud, pretty good bass over factory, highs are clear. All in all there way better than stock and for the price there great I'd buy them again

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Texas Jeeper

Round Rock, TX

Overall
Durability
Value
Features
Design
Usability
Sound great! Bit of a custom fit in 2006 Wrangler

January 18, 2017

I installed these into a 2006 Wrangler's rear sound pods. They aren't a drop in replacement though. Had to carefully align them as they barely fit onto the cutout in the pods, and had make modifications to allow the factory speed clips to be used. In order to install the grills I used a heat gun to heat up the plastic pod and mold the pods to the grills so they fit flush. Also stuffed the pods with polyfil batting to help smooth out the bass. Glued the foam deals that came with the speakers to them before mounting to help seal frame to the plastic sound pod. So far seems to have worked out well. I would recommend 5-1/4 thought which should be a drop in replacement.

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Jeromy

East Peoria, Illinois

Overall
Durability
Value
Features
Design
Usability
Nice speakers for low money

January 9, 2017

The Polk DXI 651 speakers sound great for the low cost. We bought two sets to replace the factory RAV4 speakers and we are very happy with the result. Relatively simple install and great sound. I only wish the speakers came with the proper electrical connectors.

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Jeff

Silver Spring, MD

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Best bang for the buck

January 2, 2017

I LOVE these speakers. I've always been a fan of Polk Audio for their sound quality, especially in relation to the pricepoint, but these speakers have really blown me away. For the price of a pair of low-end Pioneers, you get a MUCH higher quality speaker, with amazing sound quality, and best of all, they're marine certified, which means I don't have to worry if they accidentally get a little bit wet. They come with adapter plates, which are nice and sturdy, but you can still break off the tabs you don't need easily with pliers. They also come with speaker grilles, which I did not use. Mounting hardware is included, however wiring leads are NOT included, so make sure you order some speaker harness adapters.

I fully recommend these for anyone looking for a nice speaker on a budget.

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Robert C

Bishopville, SC

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Awesome Sound!!!

December 30, 2016

I love anything Polk Audio and these speakers will not disappoint you!

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James

Herriman, UT

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Good sound at a good price

November 27, 2016

I installed these in the front of my 2004 Honda Civic LX sedan. They fit with no issue, using a 0.5" thick mounting bracket (the speakers come with their own, but I reused the bracket from the previous speakers I had installed).

The sound is good, especially for the cost. They do not provide deep, powerful bass, but would be a great improvement over most OEM speakers. I use these speakers alongside a subwoofer, so I want the subwoofer to handle the low frequency end anyway.

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Mustang65dan

Orlando florida

Overall
Durability
Value
Features
Design
Usability
Great speaker good range

November 14, 2016

Installed speakers In kick panel and rear side panel on a 65 mustang they fit well and sound great bought 6 by 9 Polk speakers for back deck sound great will buy more from sonic when I need more stereo components

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Phillip

Morganton, NC

Overall
Durability
Value
Features
Design
Usability
Polk good OEM Replacement

October 31, 2016

Nice sound for OEM Replacement speakers. You may need brackets for Subaru Crosstrek or use cheap OEM speaker housing and cut out old woofer to make adapter for this speaker.

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Alejandro

Phoenix, AZ

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Great sound!

September 26, 2016

These speakers sound awesome. Tight clean mid bass and mellow highs work well with all types of music. They have a premium build quality and sound at a great price.

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Mesei

Bent Mountain

Overall
Durability
Value
Features
Design
Usability
Polk Audio DXi651

September 14, 2016

I installed these in the rear doors of my 98 Grand Cherokee and they sound great. Great midrange speakers if you have a subwoofer.

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panderson477

Orlando, Florida

Overall
Durability
Value
Features
Design
Usability
Polk Speskers

September 1, 2016

Great product from a OUTSTANDING merchant! Install in a 2011 Silverado 2500HD was smooth.

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E

Rowlett, TX

Overall
Durability
Value
Features
Design
Usability
very nice sound

August 13, 2016

Polk audio, the name says everything. I will be purchasing the 6x9 next. Very good product for this price range.

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Dave

Deer Park WA.

Overall
Durability
Value
Features
Design
Usability
Miata spesker replacement

August 9, 2016

I got these speakers to replace the stock speakers in My 90 Miata. They were a direct replacement other than having to drill two new mounting holes. The speakers fit fine with room to spar and the stock grills covered them fine. The speakers are a great improvement over the stock speakers.

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Dave

Deer Park WA.

Overall
Durability
Value
Features
Design
Usability
Miata spesker replacement

August 9, 2016

I got these speakers to replace the stock speakers in My 90 Miata. They were a direct replacement other than having to drill two new mounting holes. The speakers fit fine with room to spar and the stock grills covered them fine. The speakers are a great improvement over the stock speakers.

0 of 0 found this helpful

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Eddie

Balto Md

Overall
Durability
Value
Features
Design
Usability
Inexpensive Quality

July 30, 2016

Installed these in the front doors of my Gen2 Tundra Crewmax because of the mounting depth and RMS rating and they fit perfect. The real bonus came when I heard the sound come out of these babies. Crisp, clear and powerful. Satisfied is an understatement. If you're looking to upgrade your factory sound these won't disappoint.

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Steven

cincinnati, OH

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
amazing sound

June 30, 2016

I replaced the stock speakers in my 2008 Toyota Avalon with these, install was a breeze and I'm glad I did it - they sound amazing

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techdaddy101

Las Vegas, Nevada

Overall
Durability
Value
Features
Design
Usability
budget hi-fi

June 13, 2016

Really for the money it's tough to beat for what you get. First off the frequency response with or without amplification is amazing with next to no audible distortion. Moreover the materials for speakers are inline with those costing twice as much. Generally, with few exceptions these will please most regardless of music taste without a sub.

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Bdub

Jacksonville Fl

Overall
Durability
Value
Features
Design
Usability
High clarity

May 19, 2016

I replaced the factory seakers in my wife's 2013 hyundai elantra.Sounds 100% better.

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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 $36.99

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

Encore Universal Four Door Power Door Lock Kit

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

Your Price $24.99

NVX Sound Dampening Rubber Roller

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

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

XTC 6-1/2" Round Large Frame, Shallow Foam Speaker Baffles

Creates a tight seal behind speaker for enhanced audio quality.

Your Price $13.84

12-10 AWG Butt Connectors

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

Your Price $5.99

12-10 AWG Yellow T-Tap Adapters

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

Your Price $4.99

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 $11.99

Browse 1 question and 44 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I wanted an inexpensive speaker to replace the stock paper speakers in my old Honda Civic
William B on Jul 31, 2017
research
Jim S on Jul 11, 2017
Previous experience with Polk Audio.
Kawboy22 on Jul 25, 2017
more power than stock but still can run it off stock head.
William T on Jul 8, 2017

Product Summary

Manufacturer

Model Number

DXi651

Weight

5.50lbs

Internal SKU

dxi651

Internal Product ID

112437

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 DXi651 (DXi 651) db651 inspired Car/Marine/ATV Speakers

  • Polk Audio DXi Series Marine Certified Car Speakers | Product Overview
  • Replace your Car Speakers and Upgrade to Better Sound | Sonic Electronix
  • How To Test Speaker Polarity | Tips & Demo | Car Audio 101

Item Added to Cart

Polk Audio DXi651 (DXi 651) db651 inspired Car/Marine/ATV Speakers

6-1/2" DXi Series 2-way Coaxial Car Speakers - Also Marine Certified for Boat/ATV/Motorcycles!

$47.98

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Streetwires 25 ft. of True Spec 12 Gauge Speaker Wire

You need speaker wire to connect your speakers!

$36.99

Add
Encore Universal Four Door Power Door Lock Kit

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

$24.99

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NVX Sound Dampening Rubber Roller

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

$7.99

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