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Hifonics HFX12D4 Subwoofer Pair Combo

Pair of 12" Dual 4 ohm HF Series Car Subwoofers

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When One Is Just Not Enough

This combo features two 12" Hifonics HFX12D4 Dual 4 ohm HF series subwoofers. The subwoofers feature a combined RMS of 800 watts, giving you some real strong bass. The woofers are equipped with an injection poly light rigid woofer cone and a 1" NBR reinforced rubber surround. The cone and surround materials will offer increased performance, rigidity, and strong power handling capabilities. The woofers also feature an integrated one-piece poly cotton spider for controlled liner movement, and high-temperature voice coil for heat dissipation.

Here at Sonic we understand that sometimes one subwoofer is just not enough bass. So we are happy to introduce our subwoofer pair combos. With these combos you can purchase two subwoofers to get the bass you are really seeking for. The best part of these combos is that we are able to offer some savings by buying the pair together instead of one at a time. So take a look and find the best pair for you.

Hifonics HFX12D4 Features
  • Pair of 12" HF Series Dual 4 Ohm Car Subwoofers
  • Power Handling:
    • Peak: 1600 watts total / 800 watts each
    • RMS: 800 watts total / 400 watts each
  • Impedance: 4 ohm
  • Injected poly light rigid cone for excellent durability
  • 1" NBR reinforced rubber surround provides large amounts of excursion
  • Integrated one piece poly cotton spider
  • Spade style speaker terminals
  • Poly light dust cap
  • Heat dispersing ported back plate
  • Ultra ridged chrome stamped steel basket
  • High strength ABS motor cover
  • Operates In sealed & ported enclosures
  • DVC 4 ohm high-temp KSV voice coils
  • Large air cooled magnet assembly
  • Sensitivity: 87.25 dB
  • Xmax: 6.5 mm
  • Mounting Depth: 5-5/8"
  • Mounting Diameter: 10-15/16"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Subwoofer Specifications
Subwoofer SeriesHF
Subwoofer Size12"
Peak Power Handling800 watts
RMS Power Handling400 watts
Voice Coil(s)Dual
Impedance (Per Voice Coil)4 ohms
Frequency ResponseNot specified by manufacturer
Sensitivity87.25 dB
Xmax (millimeters)6.5 mm
Subwoofer DesignRound / Circle
Main Cone ColorBlack
Woofer CompositionInjected poly light rigid
Woofer SurroundRubber
Subwoofer GrilleNo
Re-Cone Kit AvailableNo
Recommended Enclosure Specifications
Recommended Enclosure TypePorted / Vented
Sealed
Minimum Sealed Box Volume1.25 cubic feet
Maximum Sealed Box Volume1.25 cubic feet
Minimum Ported Box Volume1.6 cubic feet
Maximum Ported Box Volume2.0 cubic feet
Top-Mount Depth5-5/8"
Cutout Diameter10-15/16"
Shallow Mount InstallationNo
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
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Subwoofer Grilles
Protect your subwoofer while making your enclosure look great! These subwoofer grilles are the perfect addition to your new subwoofer.
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12" Universal Subwoofer Grille12" Universal Subwoofer Grille
Protect your subwoofer with this aluminum grille that is simple to install.
$9.99
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.
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15 ft. of 12 AWG StreetWires Speaker Wire15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.
$19.99
20 ft. of 12 AWG Kicker Speaker Wire20 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.
$24.49
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.
 ProductPriceAdd?
Dynamat Rubber RollerDynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!
$18.99
Dynamat Extreme Bulk PackDynamat Extreme Bulk Pack
36 ft. Dynamat Xtreme Bulk Pack enhances the sound for your entire car!
$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!
 ProductPriceAdd?
20 oz. Bag of Poly-Fil20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.
$5.99
Spring Post Terminal CupSpring Post Terminal Cup
Makes adding a spring post terminal to an enclosure simple! Banana clip ready!
$2.99
Binding Post Terminal CupBinding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.
$2.99
Banana Clip TerminalsBanana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
 ProductPriceAdd?
AutoSound 2000 CD-101AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102AutoSound 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-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Related products
Hifonics HFX12D4
12" HF Series Dual 4 Ohm Car Subwoofer • 800W Peak • 400W RMS • Injected Poly Light Rigid Cone • 1" NBR Reinforced Rubber Surround • One Piece Poly Cotton Spider • Spade Style Speaker Terminals • Chrome Stamped Steel Basket

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

Product Summary

Manufacturer: Hifonics
Model number: HFX12D4-PAIR
Weight: 16.00 lbs
Internal SKU: hfx12d4-pair
Internal product ID: 39253
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Customer Testimonial

I just wanted to leave this testimonial to express my customer satisfaction with Sonic and my sales guy Ricky. He has been really friendly and helpful and has shown interest and knowledge of the products and giving advice and sales support. Y'all are a swell company :) Thanks!

- Matt from Atlantic City, NJ

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