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Item#: 9SIA67X3282932

HIFONICS HFX12D4 12" 800W Car Audio Subwoofer Sub

  • Hifonics
  • Poly Light Rigid
  • Single Voice Coil 4 Ohm
  • Sealed & Ported Enclosures Enclosure
  • Sensitivity 87.25 dB

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

The Hifonics HFX12D4 12 " car subwoofer features a 800 watt peak/400 watt Rms, high excursion rubber surround, large air cooled magnet assembly, high energy magnet and ultra ridged chrome stamped steel basket. Hifonics, power from the Gods!Hifonics HFX12D4 12" 600 Watt Car Subwoofer800 Watt Max400 Watt RMSDVC 4-Ohm High-Temp KSV Voice Coils1” NBR Reinforced Rubber SurroundLarge Air Cooled Magnet AssemblyIntegrated One Piece Poly Cotton SpiderInjected Poly Light Rigid ConeSpade Style Speaker TerminalsPoly Light Dust CapHeat Dispersing Ported Back PlateUltra Ridged Chrome Stamped Steel BasketHigh Strength ABS Motor CoverOperates In Sealed & Ported EnclosuresSensitivity: 87.25 dBProduct Condition: Brand NewPart Number: HFX12D4




Subwoofer Size
Cone Material
Poly Light Rigid
Surround Material
NBR Rubber
Voice Coil
Voice Coil Construction
High-Temp KSV Voice Coils
Damper (Spider)
Integrated One Piece Poly Cotton Spider


Peak Power
RMS Power
87.25 dB
4 Ohm


Sealed & Ported Enclosures
Warranty, Returns, And Additional Information

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  • Anonymous
  • 10/5/2014 8:21:29 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsfantastic

Pros: This sub kicks crazy hard thought I blew it but my amp caught on fire.... don't question it buy ATLEAST 1 of these

Cons: I didn't buy more of them

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  • brandon b.
  • 2/5/2014 1:23:45 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsDont think about it...get a pair

Pros: Perfect Beats the pioneer, and alpine subs by a landslide, (the non competition series of course) i have a alpine 500 rms at 1 ohms...sounds like i have a 15'' in the trunk. bass is so deep can feel it in my chest and cant even hear what the person is saying in the passenger seat. ive tested the can have up to a 1500 rms & 2 ohms MAX.

Cons: none

Other Thoughts: Should of bout 2 pair's

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  • Kyle B.
  • 3/20/2013 12:38:40 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs

Pros: For the price it's just fantastic, I couldn't be happier, It performs just as good as the higher priced subs out there.

Cons: None so far, and i don't expect to have any for quite some time

Other Thoughts: If you are looking for a good reliable and affordable sub, I highly recommend you buy this one, I don't think I could have found a better sub for less. Worth every penny, I promise you won't be disappointed.

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  • Anonymous
  • 3/3/2013 9:08:41 AM
  • Tech Level: Average
  • Ownership: 1 month to 1 year

5 out of 5 eggsAmazing

Pros: -Hit like a truck
-couldn't blow them if i tried
-Best bang for your buck

Cons: after 4 months of blasting these, on the way to school the bass suddenly stops... so i think to my self "lol blew another fuse" but then my car started smelling like burnt electronics. i pulled over pulled out the fuse and oped the trunk and smoke billows out. thought for sure i blew my subs. but my amp had cough on fire... just got a new amp and they still kick the heck out of my car.

Other Thoughts: I got 2 of thease subs and the Hifonics 1000w amp ( )

first off let me tell you I am a EDM freek so you know i love my bass. 3 months ago i got these as a hang me down for my dad and i made a ported box for the back of my 94 civic and for a used 200 some odd number sound system it hit like a truck. m car was literary falling apart. my passenger door window fell off the track.

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  • Robert N.
  • 12/31/2012 9:02:16 AM
  • Tech Level: Somewhat Low
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsthumps

Pros: decent visual appeal, dual voice coil was nice to have for wiring purposes, sound great, thump very hard, very sturdy, and surprisingly difficult to blow, I have an amp with twice the watts I needed and feared I blew them as soon as I started it up, it was beyond bottomed out and still fine, very good price, for ported or enclosed sub boxes

Cons: Spilled my coffee after watching it bounce on my dash a few times, I underestimated the power of these, no legitimate cons

Other Thoughts: I ordered two of these, built a box I was afraid might be too big, 24"x16"x39"(fills the back of my isuzu rodeo), out of 3/4" MDF which is what the manual recommends. After hearing these subs I am intending to port the box despite it's enormous size, and I won't be upgrading to 15" subs as I intended to. The packaging includes a cardboard cut out for tracing, I don't believe it was intentional as it was just part of the packaging, but it was perfect for the cut out dimensions. I ran bass tests to bottom out without bottoming out, as far as I can tell these are without flaw, and I am pretty hard on them, 5 eggs without a doubt.
ps. home depot did all my straight cuts for free and the sheet of 3/4" mdf was $35, but keep in mind mdf is sold as 49"x97" not 48"x96", I missed this and ended up cutting an inch off some of my MDF myself. Also if you get quick connect terminal cups remember you have 2positive and 2negative for each sub, also missed this

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  • Brody H.
  • 12/13/2012 9:46:50 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAwesome sub

Pros: Made my own box out of plywood and paired it with a 400 watt amp. It kicks hard and shakes everything. Might be buying another one sometime! I would definitely recommend.

Cons: None! it's got awesome build quality.

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Item#: 9SIA67X3282932
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