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Focal 21WX

8" Single 4 Ohm Utopia Be Series Subwoofer

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Just bought and installed a JVC car stereo from sonic. Entire transaction was handled perfectly from beginning to end. All questions were accurately answered and install accessories were a perfect fit. I will be back for more....Thanks

- Christopher from OH

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  • 8" Single 4 ohm Utopia Be Subwoofer
  • Power Handling:
    • Peak: 500 watts
    • RMS: 250 watts
  • "W" Cone woofer is made up of a foam and glass composite
  • Rubber surround
  • Zamak (zinc alloy) basket
  • 2-Layer Kapton voice coil former
  • Multi-ferrite magnet structure
  • Frequency response: 29-500 Hz
  • Sensitivity: 87 dB
  • warranty (1-year Sonic Electronix warranty or 1-year Manufacturer's warranty for example
Subwoofer Specifications
Subwoofer Size 8"
Peak Power Handling 500 watts
RMS Power Handling 250 watts
Voice Coil(s) Single
Impedance (Per Voice Coil) 4 ohms
Frequency Response 29 - 500 Hz
Sensitivity 83 dB
Xmax (millimeters) 8.5 mm
Subwoofer Design Round / Circle
Main Cone Color Black
Woofer Composition "W" Cone
Woofer Surround Rubber
Subwoofer Grille No
Re-Cone Kit Available No
Recommended Enclosure Specifications
Minimum Sealed Box Volume .52 cubic feet
Maximum Sealed Box Volume 1.06 cubic feet
Top-Mount Depth 4-3/16"
Shallow Mount Installation No
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Sonic Electronix
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Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer. 		$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation. 		$39.95
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat! 		$18.99
Dynamat Xtreme Trunk Kit Dynamat Xtreme Trunk Kit
Get better sounding bass from your new subwoofer with enough Dynamat Extreme for your entire trunk. 		$93.99
Bass Reconstruction Processors
These sound processors are perfect for enhancing the lower frequencies of a car audio system. After some installation and tuning, your new system will sound better than ever!
  Product Price Add?
The Epicenter by AudioControl (Gray) The Epicenter by AudioControl (Gray)
The original bass booster expander with included remote will enhance the bass of your new system. 		$159.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system. 		$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles. 		$5.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure. 		$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection. 		$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more. 		$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB. 		$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD 		$12.99
AutoSound 2000 CD-102 AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement. 		$12.99
AutoSound 2000 CD-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components. 		$12.99

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: Focal
Model number: 21WX
Weight: 15.00 lbs
Internal SKU: 21wx
Internal product ID: 21555