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Infinity Reference X REF-6402cfx

4"x6" 2-way car speakers

29 Reviews | 2 questions - 2 answers

Item #: 108R6402CX

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Overview

Our take on the Infinity Reference X REF-6402cfx

Do you want to hear the details you've been missing in your car's sound system? You'll enjoy exceptional clarity from Infinity's Reference X Series REF-6402cfx 4"x6" speakers. Infinity uses textile dome tweeters to give you amazing levels of detail without sounding harsh.

Designed for more clarity

Do you want to hear the details you've been missing in your car's sound system? You'll enjoy exceptional clarity from Infinity's Reference X Series REF-6402cfx 4"x6" speakers. Infinity uses textile dome tweeters to give you amazing levels of detail without sounding harsh.

REF-6402cfx 4

Larger woofer for more bass

The REF-6402cfx features tough polypropylene woofers and durable hi-roll rubber surrounds that deliver strong performance. Each Plus One+ woofer sports a significantly larger cone than speakers of similar size, adding plenty of punch to the speaker's smooth and accurate highs.

Great for any power supply

You can power these speakers with up to 45 watts of RMS power — they'll work great with an external amplifier, but they're also sensitive enough to be a good match for a factory or aftermarket stereo. Plus, Infinity comes up with a safe way to get a little more power out of your system — these 3-ohm speakers combine with the speaker wire in your car so your car stereo sees actual 4-ohm impedance. Grilles are not included — factory grilles are appropriate for most installations.

Perfect fit in a 2003 Jeep Wrangler using the Crutchfield supplied mounting and wiring adapters. Some improvement over the 13 year-old stock speakers, but not a much improvement as I had hoped for.

Terry L, Grovetown, GA

What's in the Box:

  • Two 2-way speakers
  • 2 Standard 4x6 mounting adapters (installed)
  • 8 Machine screws (attaching speakers to mounting brackets)
  • 2 Adhesive foam gaskets
  • 2 Infinity logos
  • Template on box
  • Owner's manual (English/ Danish/ German/ Spanish/ Finnish/ French/ Italian/ Dutch/ Polish/ Portuguese/ Russian/ Swedish/ Turkish/ Chinese)

Product Highlights:

  • 4"x6" 2-way speakers (pair)
  • Plus One+ polypropylene woofer cone with hi-roll rubber surround
  • 1" edge-driven textile dome tweeter
  • True Four Ohm Impedance technology: speaker's 3-ohm impedance combines with speaker wire impedance for a 4-ohm load
  • compatible with virtually all factory or aftermarket car stereos
  • power range: 5-45 watts RMS (135 watts peak power)
  • frequency response: 75-21,000 Hz
  • sensitivity: 92 dB
  • top-mount depth: 1-7/8"
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews

Infinity Reference X REF-6402cfx Reviews

Average Customer Review:

29 Reviews

Infinity Reference X REF-6402cfx

Written by: Terry L from Grovetown, GA on May 25, 2016

2003 Jeep Wrangler
Crutchfield Customer Review (What's this?)

Perfect fit in a 2003 Jeep Wrangler using the Crutchfield supplied mounting and wiring adapters. Some improvement over the 13 year-old stock speakers, but not a much improvement as I had hoped for.

Pros: Easy installation.

Cons: Sound good, but not great.

Infinity rear door speakers

Written by: Luis Escobar from Mustang, OK on May 24, 2016

2001 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Pretty good. Expected a little more bass. Overall would recommend

Pros: Great quality Great sound

Cons: A little more bass

Infinity Reference X REF-6402cfx

Written by: E.Lumps from E.Haven CT on May 6, 2016

2006 Jeep Wrangler
Crutchfield Customer Review (What's this?)

Great sound & clarity for a small speaker. Nice bass too

Pros: Easy install

Cons: None

dash speakers 05 Wrangler

Written by: Wrangler from Denver, CO on April 30, 2016

2005 Jeep Wrangler
Crutchfield Customer Review (What's this?)

Speakers came quickly, Installed easily, And sound awesome in dash of Wrangler.

Pros: See above

Cons: na

Infinity Reference Speakers

Written by: Robert from Charlottesville, VA on April 22, 2016

1999 Jeep Wrangler
Crutchfield Customer Review (What's this?)

I have used Infinity Reference speakers before and not running an amp, they are great speakers!! I will be buying a matching set to go in my roll bar enclosure. Nice speakers!!

Pros: Great sound! Easy install! and they are Infinity's!

Cons: None!

Does the job

Written by: J from Woodbridge, VA on April 10, 2016

2002 Jeep Wrangler
Crutchfield Customer Review (What's this?)

This was my first speaker install. Crutchfield sales rep recommended these speakers considering that I was not running an amp. Sounds good to me!

Pros: The speakers were on sale. Easy install with the included brackets. Sounds better than factory speakers

Cons: None

Less than infinities best

Written by: Ryan from Sodus, NY on April 7, 2016

2003 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

I was looking to upgrade my basic factory speakers with something a little more powerful. I have all infinity speakers in my Kia Optima and they sound amazing. I decided to put infinity speakers in my truck for that reason. These infinity speakers however, don't sound much different than the factory speakers I already had in my truck. I wouldn't really recommend these speakers as a factory upgrade. They are just about the same as a factory speaker

Pros: The infinity name. Easy install

Cons: A very basic dull speaker hidden behind a good name

Sounds great

Written by: Shawneli from North, Al on March 18, 2016

2002 Jeep Wrangler
Crutchfield Customer Review (What's this?)

Sounds really good

Pros: Easy installation, clear sound

Cons: None

Infinity 4x6

Written by: HiFi from West Virginia on December 14, 2015

2011 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Great replacement for 2011 Silverado 1500 Std. Cab. Matched them up with 6 1/2 Infinity door speakers.

Pros:

Cons:

Top shelf implant

Written by: Craig from Lowell, Ohio on December 10, 2015

1998 Chevrolet S10
Crutchfield Customer Review (What's this?)

Installed the 4/6 and the 6 3/4 in my S10 and it sounds awesome. Plenty of base and the imagery is excellent. Nice upgrade.

Pros:

Cons:

Excellent sounding small speakers

Written by: hitch from Wichita, KS on October 21, 2015

2003 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

These Infinity speakers provide the best sound possible from a small 4" package. Separate, integrated tweeters provide great clarity.

Pros: Fits most 4" GM applications. Included, removable mounting brackets. Big sound. Clarity of sound.

Cons:

Great Factory Replacement

Written by: TB from Maryland on June 18, 2015

2003 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

Sound great as a factory replacement in my 2003 Silverado 2500

Pros: Crisp & clear high range

Cons: Bass is ok

Infinity Reference X REF-6402cfx

Written by: Wayne G from Lebanon, TN on April 27, 2015

1999 Chevrolet Silverado
Crutchfield Customer Review (What's this?)

Bought for the rear to go with the Infinity Reference X REF-6500cx I got for the front of my 99 Silverado. Awesome sound even from the stock stereo which I did not want to replace at this time. Infinity makes a great product, and Crutchfield made the perfect recommendation based on my needs and music taste. Still haven't decided whether or not I want to add a small, powered subwoofer, but if I do, I'll be getting it from Crutchfield. They have evaluated hundreds of systems, and always seem to know just what you need.

Pros: Great sounding speakers. Installation went very well. Crutchfield support cannot be beat

Cons: None

Great Replacement

Written by: Uppy's from Lancaster, Wisconsin on April 22, 2015

2000 Pontiac Grand Am
Crutchfield Customer Review (What's this?)

Replaced factory 4x6 speakers in 2000 Grand Am with these and the sound is amazing combined with a Pioneer head unit and 12" subs.

Pros: Very clear sound.

Cons: None

Infinity Reference X REF-6402cfx

Written by: jnzcrue from Illinois on January 24, 2015

2004 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

There was not much difference b/t the Infinity speakers over the factory speakers they replaced in sound quality (construction quality big difference). Mids and High acoustics pretty good bass is terrible. Too the point I have to adjust stereo sound when certain songs come on (I also do not run the system hard). I have a Pioneer head unit that I need to keep the volume level no higher than 20 before they start to sound blown on bass (only). If coupled with sub and crossover, then probably pretty good speakers.

Pros: Price was very fair for Infinity Speakers, installation easy with Crutchfield MasterSheets, material construction quality of speaker.

Cons: Bass very weak even for a small speaker.

Great Sound

Written by: JBMatt66 from Indiana on December 28, 2014

Crutchfield Customer Review (What's this?)

Great sound and fit right into the openings

Pros:

Cons:

Great highs, Crappy Lows

Written by: Kevin (1995 S10 Extreme) from East Brunswick, NJ on December 27, 2014

Crutchfield Customer Review (What's this?)

Speakers sound really good when paired with a subwoofer, or larger component speakers (both in my case; 6.5in components in the doors and 10in shallow sub behind the seat) but really add nothing in the area of bass. The speakers are in the dash of my pickup, and add great clarity and loudness to the soundscape, but really lack in bass production; most likely due to its lack of surface area, but that was expected with the 4x6s. Also, the plate they come attached to seems flimsy and isn't securely attached to the speaker itself. Ended up removing the rectangular plastic plate it is attached too, and re-attaching it with larger surface screws and glue.

Pros: Great clarity and high notes.

Cons: Horrible bass quality, and crappy mounting plate.

great speakers

Written by: John from georgia on December 26, 2014

2011 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

great sound, good bass considering the size of the speakers. I paired these with Infinity Reference X REF-6502ix in doors and pioneer head unit. Vast improvement over factory. Installed in 2011 silverado std cab

Pros: quality built, great sound overall great speakers

Cons: I haven't found any

Infinity

Written by: Irby t a from Lafayette la on September 4, 2014

1993 Chevrolet C Series
Crutchfield Customer Review (What's this?)

Sounds good in truck The 6.5 next. The fix great

Pros:

Cons:

HUGE UPGRADE

Written by: Derrick F. from Arvada, CO on June 16, 2014

2002 Pontiac Grand Am
Crutchfield Customer Review (What's this?)

These speakers are a huge improvement over our stock ones. Especially since the stock ones were made out of paper. Install was super easy.

Pros: Great sound, Ease of install, quality material.

Cons:

Infinity Reference X REF-6402cfx

Written by: Anonymous from Kettering, OH on April 4, 2014

Crutchfield Customer Review (What's this?)

The Infinity REF-6402cfx speakers recommended by a Crutchfield phone rep did not fit the back doors of my 2007 Chevy, Silverado ext, cab. I returned them for a pair of Infinity REF-6502ix which fit perfectly and sound fantastic.

Pros:

Cons:

Great Product as always

Written by: Adam A from Palatka, FL on December 18, 2013

2003 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Just another great Infinity product!

Pros: Clear sound quality at a low price

Cons:

Nothing overly special, but decent

Written by: Anonymous from Kennesaw, GA on July 18, 2013

1995 GMC Sierra
Crutchfield Customer Review (What's this?)

I was recommened these speakers from a crutchfield advisor as a good all around speaker. I'd say they're fairly good quality. The highs and mids on them are crystal clear but the bass is reletively lacking presence but it is afterall a 4x6 speaker. Doesn't sound badat all, but I think its lacking on the bass side a tad

Pros: Awesome highs and mids, fit perfectly with no modification required

Cons: Simply a lack of bass

Infinity Reference X REF-6402cfx

Written by: Robert from San Antonio, TX on May 22, 2013

2003 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

I replaced the worn out speakers in my 2003 Silverado with these speakers. The installation was pretty easy with the helpful links on the website. The speakers sound great and I couldn't be happier. I might just look into a new radio in the future to go with the new speakers.

Pros:

Cons:

great product

Written by: NateT from Boise, ID on May 10, 2013

1990 Chevrolet C Series
Crutchfield Customer Review (What's this?)

Great sound, good fit, in a small package.

Pros:

Cons:

Great

Written by: Andycapt from Jersey cape on May 2, 2013

Crutchfield Customer Review (What's this?)

Just plain great. 6030's in the front

Pros: Always good stuff from these people

Cons: None

Great Speakers!

Written by: Shane from Huntsville, AL on April 28, 2013

2007 Chevrolet Silverado 1500 Classic
Crutchfield Customer Review (What's this?)

Outstanding replacement of mediocre factory speakers! These sound great even with factory stereo. I am replacing factory stereo soon and can't wait to hear the complete setup!

Pros: Sound, ease of installation, value

Cons:

Infinity Reference X REF-6402cfx

Written by: Anonymous from Fluker, LA on March 5, 2013

2007 Chevrolet Silverado 1500 Classic
Crutchfield Customer Review (What's this?)

Crisp and clear. Sounds great!!!!

Pros:

Cons:

Disappointed

Written by: Bobsharonc from Derby ks on November 19, 2012

The sound of the speakers were no better than the orginal equipment. Plus where they connect to the panel they are made of a hard brittle plastic that breaks shortly after installation.

Pros:

Cons:

Details

Hands-on research

What's in the box?

Download the Infinity Reference X REF-6402cfx manual

  • Two 2-way speakers
  • 2 Standard 4x6 mounting adapters (installed)
  • 8 Machine screws (attaching speakers to mounting brackets)
  • 2 Adhesive foam gaskets
  • 2 Infinity logos
  • Template on box
  • Owner's manual (English/ Danish/ German/ Spanish/ Finnish/ French/ Italian/ Dutch/ Polish/ Portuguese/ Russian/ Swedish/ Turkish/ Chinese)

Features and Specs

General
Design 2-way
Tweeter Design Edge-Driven Dome
Tweeter Composition Textile
Woofer Composition Polypropylene
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity 92 dB at 2.83 volts
Frequency Response 75 - 21k Hz
RMS Power Range (Watts) 5-45
Peak Power Handling (Watts) 135
Impedance (Ohms) 3
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) N/A

Product Research

Features

Plus One+ Woofer Cones: Each speaker uses a cone significantly larger than other speakers of the same size. This is accomplished by using a unique basket design and hi-roll surround. The Plus One+ design offers greater bass output and increased efficiency.

Hi-roll Rubber Surrounds: The hi-roll rubber surrounds allow the woofers a greater range of movement, resulting in longer X-max and more bass output.

Textile Dome Tweeters: Each speaker uses an edge-driven textile dome tweeter for smooth, accurate highs.

True Four Ohm Impedance Technology: The speaker's 3-ohm impedance combined with the impedance of your speaker wire provides a true 4-ohm load to your connected head unit or amplifier.

Power Handling: Although Infinity rates the 6402cfx speakers at 45 watts RMS (continuous average), they also recommend amplifiers with a power rating from 5 to 50 watts RMS.

Bottom Mounting: While the standard 4x6 adapters appear to be easily removable, they are glued in place at four points around the perimeter (in addition to the four screws, which are obvious). With the adapters in place, the speakers fit many top mount standard 4x6 and metric 4x6 applications. If the adapters are removed the speakers will fit additional top mount metric 4x6 applications, as well as bottom mount metric 4x6 applications.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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