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Hifonics HFX12D4

400W 12" HF Series Dual 4 ohm Subwoofer

In Stock
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List price $69.99

$34.99

with warranty

You Save: $35.00 (50.01%)

Arrives by Monday, Sept. 22 to zip 98109

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Bundled Savings with this Product

Save 10% on a Trunk/Cabin Sound Damping Kit!

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6.00

37709

616

Hifonics HFX12D4

$34.99

+

10% OFF

Maxxlink VSD-TK

$59.99

Special Price $53.99 ($59.99 if purchased separately)

Maxxlink VSD-TK

• Eliminates Road Noise
• Reduces Rattles
• Heat Insulation
• Five 18" x 32" Sections
• Butyl-Based Material

10% Off on the Subwoofer Box!

Save 10% off a 12" sealed subwoofer enclosure with your purchase!

3.50

37709

503

Hifonics HFX12D4

$34.99

+

10% OFF

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

$34.99

Special Price $31.49 ($34.99 if purchased separately)

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(Offer 1 of 2)

Combined Total Price

$88.98

You Save $6.00

Hifonics 12" HF Series Car Subwoofer

Sonic Electronix is now carrying the Hifonics HF Series Car Audio Subwoofers. The HF Series 12" Subwoofer has a peak power rating of 800 watts and a RMS rating of 400 watts. This sub will produce some ground shaking bass and is constructed with a injected poly light rigid cone and a 1" NBR reinforced rubber surround for enhanced excursion. This woofer is also equipped with a dual 4 ohm voice coil and a large air cooled magnet assembly. Add some bumps in your trunk and enhance your cars stereo system with this Hifonics HF Series Subwoofer.

Product Features

  • 12" HF Series Dual 4 Ohm Car Subwoofer
  • Power Handling:
    • Peak: 800 watts
    • RMS: 400 watts
  • 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

Product History:

Hifonics HFX12D4 thumbnail
(newest, current model)
Hifonics HFi12D4 thumbnail
(previous model, replaced by Hifonics HFX12D4)
Hifonics HF12D4 thumbnail
(previous model, replaced by Hifonics HFi12D4)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
HF (Hifonics)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
800 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
400 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
Not specified by manufacturer
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
87.25 dB
Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
6.5 mm
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Black
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Injected poly light rigid
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Rubber
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.25 cubic feet
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.25 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.6 cubic feet
Maximum Ported Box Volume
This value indicates the maximum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.0 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
5-5/8"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
10-15/16"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
62%
4 Star
30%
3 Star
4%
2 Star
3%
1 Star
1%

Average Attribution Rating

Durability
4.3
Value
4.8
Features
4.2
Design
4.4
Usability
4.6

StaS

Silver City, NM

Overall
Durability
Value
Features
Design
Usability

no words

November 22, 2011

I've been a car system fan for many years and had alot of setups. These Hifonics Subs are more than you can ever expect from a low priced subwoofer like this one. If you are looking for a setup of two or more speakers these are the best. Great looking, powerful, CHEAP(money wise) and built to last. I have 3 of them and let me tell you they hit so hard my ears ring. Oh yea one more thing Sonic Electronix - a super glue should come with these subs cuz my rear view mirror fell right off. :)) That should tell you (buyers) that these product is worth of money. Thanks for reading this hope I helped.

5 of 5 found this helpful

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Logan

crescent city

Overall
Durability
Value
Features
Design
Usability

Nice sub

December 30, 2011

Sounds looks and is a great sub. Best for the money.

2 of 2 found this helpful

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Ricky Shade

Tampa, FL

Overall
Durability
Value
Features
Design
Usability

Keeps blowing me away more and more!

November 6, 2011

This sub just keeps hitting harder and lower! I'm amazed and blown away! I was underwhelmed for a while there because I realized that I actually killed my previous sub by sending a very strong and very clipped signal to it by having the gain set too high for my head unit's preamp voltage. To reach the ~250W RMS the amp is rated for with my head unit, I need the gain knob LESS than half way up. Any more than that and it starts distorting, and this is not because of the sub but because I'M SENDING A CLIPPED SIGNAL FROM MY AMP. I feel like I've officially made that step from n00b to experienced installer. I had read all the instructions and guides before and never understood what they meant by matching the head unit's preamp voltage. Now I do and I know how not to kill a sub (and/or amp, for that matter). Anyway, I had never broken in a sub and this sub is STILL blowing me away! It's hitting harder and it does better throughout the entire range. The lower notes (centered in the mid to high 30Hz range) I could barely feel at the start are now making the car have a slow, deep vibration when they hit (remember it's a sealed box). Being a 400W sub I feel like playing it full-blast at 250W RMS is good enough as 'breaking it in' and it is just finally beginning to impress me. It's hitting almost as hard as the Memphis sub that was getting a clipped signal with a few extra watts to compensate for my bass-trap trunk (thick leather seats, kills any bass trying to come from right behind you). Right now I'm keeping my rear seat's backrest down so I can feel the full effect of the sub. I just can't wait to give it 400W. OMG. What a great sub. If 'you get what you pay for' is true 99% of the time, the HFX12D4 is the 1%, by far!

2 of 2 found this helpful

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David

New Lenox, IL

Overall
Durability
Value
Features
Design
Usability

Its the best bang for your buck

February 1, 2013

The hifonics hfx12D4 is the best subwoofer on the market if your on a budget, yes the price may scare you, you say well with the sub that cheap how could it possibly be true that it sounds to good, well take it from me, i was very unsure of the purchase i made with this sub, i strictly went off of reviews, however, this subwoofer i my home theater sub, it hits. i owned 2 alpine type R 12s, so believe me i know what it means when a subwoofer hits. but the cold hard truth is, this sub is amazing the quality is so precise you cant help but to be cautious. BUY THIS SUBWOOFER YOU WILL NOT REGRET IT!!!

1 of 1 found this helpful

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Cwayne1

conroe, TX

Overall
Durability
Value
Features
Design
Usability

great product

September 7, 2014

Could not believe the sound quality of this sub for the price.It is amazing what it sounds like for the price.

0 of 0 found this helpful

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Connor

Batavia, IL

Overall
Durability
Value
Features
Design
Usability

Just purchased

July 22, 2014

I just bought this, and installed it in my 2000 accord. Don't be fooled by the price, this thing kicks. I hooked it up to my Pioneer GM-5500T amp putting out around 400 watts RMS. This sub sounds great so far.

0 of 0 found this helpful

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Doc

Houston, TX

Overall
Durability
Value
Features
Design
Usability

BIG BANG FOR A SMALL PRICE

July 14, 2014

i bought 2 of them no lie they hit hard i have then in a box thats .27 too big but none the less they are still hitting hard if your on a budget and dont want to go over it then these subs will get the job done

0 of 0 found this helpful

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ray-ray

atlanta,ga

Overall
Durability
Value
Features
Design
Usability

ok subs

June 23, 2014

i have these subs on a 2800 watt boss amp. 2 of them in a ported box. they sound good for the amount of money they cost. i fried them both in about 2 months. my next subs going to be some kickers cvr.

0 of 0 found this helpful

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McLeod

Ocala, Florida

Overall
Durability
Value
Features
Design
Usability

Good buy

June 22, 2014

I would buy this speaker again...Mounted up perfectly and sounds just fine...

0 of 0 found this helpful

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numbers

Canada

Overall
Durability
Value
Features
Design
Usability

Great sub for the price

June 18, 2014

I got 2 of these and was surprised with what I got for under forty bucks each, they sound great, and look decent, however as some other people have stated, the plastic cover on the bottom is really annoying. I'd recommend using rubber cement or sealant to keep the plastic piece from rattling on the basket

0 of 0 found this helpful

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tim

eureka, ca

Overall
Durability
Value
Features
Design
Usability

great product

May 23, 2014

I bought these to replace the blown subs in my daughters jeep. Great sound! These speakers really have great responce. Great value. Highly reccomend.

0 of 0 found this helpful

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Drew

Deatsville, AL

Overall
Durability
Value
Features
Design
Usability

YEAH

May 8, 2014

these speakers are amazing and the price is even better. I bought two and thought they would so pretty okay since the price was so cheap but these things rattled the streets when I went to pc this and everytime I pull up at my house the walls rattle. GREAT SPEAKERS A MUST BUY!

0 of 0 found this helpful

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Carl

White Cloud, MI

Overall
Durability
Value
Features
Design
Usability

Hifonics

May 5, 2014

I bought these as a gift for my girfriends birthday. And they are very decent subwoofers. Thanks sonic!

0 of 0 found this helpful

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derrick

chicago, IL

Overall
Durability
Value
Features
Design
Usability

These woofers bang!

April 16, 2014

I purchased these woofers mainly because they were DVC and my previous woofers, JL audio's were not. I needed 3 so they were perfect and the right price. These speakers are the truth I have 3 bridged on a 1500 watt 2 autotek amp, purchased right off of sonic electronics. Even with the bass knob turned down and with the factory radio I have a rumble with the radio on anything past 5. I've only had them for 2 weeks so I cant speak on durability but reading the reviews helped me make my decision and I hope this review helps someone make theirs.

0 of 0 found this helpful

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Andre

Canada

Overall
Durability
Value
Features
Design
Usability

Awesome.

April 12, 2014

First time buying, skeptical at first but like all the other reviews said i'm extremely happy. Running it at 4 ohm about 100 watts above rms and its great low and high.

0 of 0 found this helpful

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Keith

New Bloomington, OH

Overall
Durability
Value
Features
Design
Usability

Great price

April 10, 2014

My friends are happy, and that's what makes me happy.

0 of 0 found this helpful

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Darealjug

Orlando, FL

Overall
Durability
Value
Features
Design
Usability

DO NOT BUY!!!!!

April 10, 2014

Bought 2 of these and both blew out almost a month in.... Put them in my Maxima in a seal box with a mmats 250 amp. These woofers are junk!!!! Replaced them with 2 fosgates that cost a few more dollars and it was well worth it.... No more headaches.......

0 of 0 found this helpful

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Sergio

Greenville, SC

Overall
Durability
Value
Features
Design
Usability

Great

April 9, 2014

Good pounding subs for a great price one of the best subs I have had for a great price.

0 of 0 found this helpful

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pacman

kalmazoo

Overall
Durability
Value
Features
Design
Usability

Kalamazoo mi

April 5, 2014

Not bad for the price. I have them in a sealed box being pushed by 1500watt Rockford fosgate punch.passive equalizer on sub. They bump.sound okay. Not like mtx terminators, but good bass for price.im just use to serious sounds. Grand prix hold good sound anyway.the bass is not deep enough even tough I can see everything outside the car shaking.

0 of 0 found this helpful

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Michael

27804

Overall
Durability
Value
Features
Design
Usability

good value for an entry level sub

April 5, 2014

I think this sub is a good entry level sub with a great price...it does a decent job of producing bass frequencies providing its in the correct box.

0 of 0 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil.

Your Price $34.99

Single 12" Ported Enclosure Custom Black Baffle

Gold Binding post terminals and a high quality 5/8" MDF construction.

Your Price $59.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $109.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

Spring Post Terminal Cup

Makes adding a spring post terminal to an enclosure simple! Banana clip ready!

Your Price $3.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $12.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

2" Universal, Professional Heavy Duty Roller for Sound Damping/Dampening

Universal rubber roller to make it easy to install sound dampening.

Your Price $7.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

Scosche SPL Meter

Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.

Your Price $21.99

Impedance Meter / Signal Generator

Easy to locate tuning frequencies of passive radiators and ported enclosures

Your Price $299.99

1 Hifonics HFX12D4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Hifonics HFX12D4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Hifonics HFX12D4 Subwoofers

Mono Amp

4 Channel Amp

4 Hifonics HFX12D4 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Items we think you might want

HFX12D4-PAIR thumbnail

Hifonics HFX12D4 Subwoofer Pair Combo

• Pair of 12" HF Series Dual 4 Ohm Car Subwoofers
• 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

Your Price $64.27

Browse 1 question and 4 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Needed a replacement speaker this one one was a good affordable price
Ej S on Aug 26, 2014
great reviews with a cheap price
Jacob M on Aug 14, 2014
Wanted it for awhile. Student and cant afford much but couldn't pass on price.
Jonathon B on Aug 25, 2014
Name recognition
stephen s on Jul 31, 2014

Product Summary

Manufacturer

Model Number

HFX12D4

UPC

806576217961

Weight

8.30lbs

Internal SKU

hfx12d4

Internal Product ID

37709

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Hifonics HFX12D4