See all parts that fit your 2011 Focus
4" x 6" 2-Way Reference X Series Coaxial Car Speakers
• Peak Power: 135W
• RMS Power: 45W
• 2-Way Coaxial Design
• 3 ohm Impedance
• Polypropylene Cone
• Butyl Rubber Surround
• 1" Textile Dome Tweeter
Install New Speakers in select 1993-2017 vehicles from Ford, Mazda, Mercury
$9.99
List price $14.99
Connect Factory Antenna to New Aftermarket Radio in select 2002-2020 vehicles from Ford, Chevrolet, GMC
$3.99
List price $14.99
Install a new Single-DIN or Double-DIN car stereo in select 2008-2011 Focus (Silver)
$41.99
List price $75.99
Crux SOOFD-27 Wiring Interface
Install new car stereo and retains accessory power and other factory features in select 2005-2012 vehicles from Ford, Lincoln, Mercury
$75.60
List price $117.60
720W Peak (120W RMS) 6x8" HED Series 3-Way Coaxial 4-ohm Speakers
$79.99
List price $95.99
400W Peak (100W RMS) 6x8” DS Series 2 Way Coaxial 4-ohm Car Speakers
$84.99
List price $94.99
• Peak Power: 135W
• RMS Power: 45W
• 2-Way Coaxial Design
• 3 ohm Impedance
• Polypropylene Cone
• Butyl Rubber Surround
• 1" Textile Dome Tweeter
These speakers are specially designed with true 4ohm technology. The impedance of these speakers are 3ohms, but when you pair them with thin factory wiring, the impedance will naturally rise up to a true 4ohms resulting in a maximum amount of power draw from your 4ohm rated factory receiver, aftermarket deck, or external amplifier. What it comes down to is efficiency. If you need a speaker that will get the most out of your current sound system, the Reference X series is for you.
Each of the Reference X speakers features plus one woofer cone technology. This means the cone has been designed to be slightly larger than comparable speakers, giving you even more output on the same amount of power. This drastically increases the efficiency of the speaker, and also extends the frequency response even lower to give you that nice thump you’ve been looking for.
Want an easy upgrade for your factory speakers without going over your budget? The Infinity Reference X Series is for you. Its engineered to bring your factory audio system to life, or to add clarity and depth to an aftermarket system. With innovative, patented technologies, and the kind of premium quality and construction that you would expect from the worlds top-selling premium car speaker brand, Infinity Reference X speakers will transform your listening experience into something amazing.
Sonic Electronix, one of the leaders in car audio, recently visited Harman, the premium global audio and infotainment group, at their research and development locations in Northridge, California and Detroit, Michigan. The purpose of these visits was to utilize and combine the powerful brand of Harman and the industry leading knowledge behind Sonic Electronix to begin working together on developing future car audio projects.
Priced Per Pair
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(newest, current model)
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(previous model, replaced by Infinity Reference REF-6422cfx)
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(previous model, replaced by Infinity Reference X REF-6402cfx)
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(previous model, replaced by Infinity Reference 6432cf)
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6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$339.99
List price $420.00
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto, and Built-in Alexa (Sirius XM Ready)
$469.99
List price $620.00
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)
$399.00
List price $600.00
Single DIN Digital Media Receiver with Bluetooth and Amazon Alexa
$129.99
List price $150.00
6.75" Double DIN Touchscreen Digital Multimedia Receiver with iDataLink Maestro Support, Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)
$349.95
List price $500.00
10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wired Android Auto (SiriusXM Ready)
$798.00
List price $999.99
Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)
$199.00
List price $250.00
6.2" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth and Built-in Alexa
$194.99
List price $300.00
Best selling similar products
• 300 watts Peak Each
• 1" Mylar Dome Tweeters
• Low Mass Poly-Injection cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB
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• Peak Each, 40 watts RMS Each
• 1" Silk Soft Dome tweeters
• Polypropylene cone material with concave design
• Impedance: 4 ohm
• Sensitivity: 92 dB
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• 60 watts Peak Each, 20 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Injection Molded Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB
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Manufacturer:
Model Number:
REF-6402cfx
Weight:
3.30lbs
Internal SKU:
ref-6402cfx
Internal Product ID:
61826
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Chevy Truck Speakers
Absolutely 1000% better than factory speakers. Sounds great. The sound is so much better.
15 found this helpful
Fantastic Quality
I bought these to replace my factory 4"x6" speakers. I was blown away at the sound quality from these speakers. For such a small pair of speakers, they put out an incredible amount of bass and have crystal clear mids and highs. They actually out-performed the JVC 6x9's that I bought, so I ended up replacing those with a pair of Infinity Kappas. I would highly recommend these, and any other Infinity product if you're looking for quality. If you're looking for an incredible subwoofer, I highly recommend the Infinity Reference 1262w or the Kappa 120.9w.
11 found this helpful
great speakers
This is a very good pair of speakers, they sound really loud and clear. I would recommend it.
8 found this helpful
Great speakers, amazing sound.
Very loud and very clear especially when you amp them.
7 found this helpful
Entertainer bus driver
Speakers sound great,highs are clear and base is solid
7 found this helpful
great sound
Very clean, and clear. Put them in the rear of my gm pick up, running of pioneer head unit. Makes my front Pioneer 4 ways sound flat in comparison. On the Sonic site now to order some Infinity 6 3/4 to put in the front.
7 found this helpful
AWESOME
I bought these for my 90 Chevy Truck regular cab for the rear location. And they sound great. Im only running them off of the radio no amp. I plan on getting a small one. But it sounds just fine with out. Great speakers and you cant beat the price.
7 found this helpful
great highs for the money
I installed these in an 02 GMC 1500 Extended cab and they fit perfectly in the rear location. I have 80 watts going to them and they sound great. Sonic Electronics has the best price on these you will find.
7 found this helpful
Great sound
This is a good speaker with solid sound in all ranges. But the treble can bit a little too loud, amazing clarity though.
6 found this helpful
Infinity -- the ONLY way to fly
Small form factor; LARGE sound and quality of music. Great sound from a little package. Much better than larger, more powerful components. You will not regret any Infinity product.
4 found this helpful
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Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!
(48)
$14.99
List price $18.74
NVX SDBPRO20 20 Square Feet Damping Kit
Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks! (4.5mm Thick)
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NVX SDBBP40 36 Square Feet Damping Kit
Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks! (91mil Thick)
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Eliminates speaker panel distortion and reduces door vibration, rattles and squeaks!
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NVX SDRLR1 Sound Damping Rubber Roller
Universal Professional Heavy Duty Roller for Sound Damping
(127)
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NVX SDRLR2 Sound Damping Rubber Roller
Universal Professional Heavy Duty Roller for Sound Damping
(19)
$11.99
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NVX 25 ft. of True Spec 16 Gauge Speaker Wire
100% OFC wire with EnvyFlex metallic jacket and noise eliminating twisted-pair technology to provide crystal clear sound.
(57)
$14.99
List price $29.99
Belva 23 ft. of True Spec 16 Gauge Speaker Wire
100% Copper Clad Aluminum and PVC blended jacket for easy installation and high strand count for maximum audio quality
(20)
$12.99
List price $24.99
Belva BTK106 Trim Panel Remover
Six Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers
(46)
$14.99
List price $19.99
Belva BTK105 Trim Panel Remover
Five Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers
(73)
$11.99
List price $18.99
500W Mini Component Shelf System with 5-Disc Changer and Subwoofer
$199.99
List price $229.99
DECT 6.0 Expandable Cordless Phone System with Bluetooth Wireless Technology and Touch Controls on the Handset and Base
(1)
$69.99
List price $89.99
4-Band Parametric Equalizer with Subwoofer Electronic Crossover
$29.99
List price $49.99
Install New Speakers in select 1998-2024 vehicles from Ford, Lincoln, Mercury
(7)
$8.99
List price $9.99
Retro Series Hot Air Kettle Popcorn Maker (Red)
$79.99
List price $109.99
Expandable Two Handset Cordless Phone System with Digital Answering Device and Caller ID
$69.99
List price $79.99
Stereo Alarm Clock for iPod with LCD Display and Digital FM Tuner
$59.99
List price $79.99
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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:
Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.
