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Hifonics HFX12D4 Subwoofer Pair Combo

Pair of 12" Dual 4 ohm HF Series Car Subwoofers

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List price $139.98

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$55.00

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Hifonics HFX12D4 Subwoofer Pair Combo

Pair of 12" Dual 4 ohm HF Series Car Subwoofers

$55.00

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Single 12" Venteded MDF Subwoofer Enclosure

12" Vented 3/4" MDF Enclosure Lined w/ Polyfil.

$54.99

Add
NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

$39.99

Add
20 Square Feet of Sound Dampening Material

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

$53.99

Add

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Hifonics Audio Store

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 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
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
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
Magnet Structure
Defines the overall structure of the subwoofers magnet.
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
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in 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
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in 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

Electromechanical Parameters

Free-Air Resonance (Fs)
The free-air resonance frequency of the subwoofer, measured in Hz. At this frequency the weight of the moving parts is perfectly balanced with the subwoofers suspension system.
Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 – 10.
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
Efficiency Bandwidth Product (EBP)
This number represents the trade off between having an efficient woofer and one with a wide bandwidth. To calculate this number, take the Fs and divide it by the Qes. If the number is below 50, the woofer is designed for a sealed enclosure only. If it's between 50-100 it can be used in either. Lastly, if it's greater than 100 it's designed for vented enclosures.

Specials with this Item

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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
40%
4 Star
20%
3 Star
20%
2 Star
20%
1 Star
0%

Average Attribution Rating

Durability
3.4
Value
3.6
Features
3.2
Design
4.0
Usability
4.4
unknown

silver city

Overall
Durability
Value
Features
Design
Usability
good for price

January 7, 2014

Had got to of these back n the day for a good deal put um in the homies monte 88 monte carlo in a sealed enclosure 1.25 per sub on about 200 rms each from a smaller amp n these subs sounded really good crisp n clean not vibrating houses next to u loud but a very deep tone inside the car. For the price its worth it I doubt they'll take a true 400rms but cant say for sure kuz I never gave them more than 250 a piece. overall $54.99 for two is a good deal.

21 of 26 found this helpful

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eduardo

elgin, TX

Overall
Durability
Value
Features
Design
Usability
400 rms a big NOOOO

March 21, 2014

The material made its cheap really thin cone and also the back cover of the sub its vibrate when you even try to hit good bass so you cant even get good high's or low's

18 of 22 found this helpful

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Doc

Houston, Tx

Overall
Durability
Value
Features
Design
Usability
Bang on a budget

March 16, 2015

i have 2 of them running at 2 ohms a each on a "1000" watt 2 ch Boss amp running "500" watts each. all though my box is built and tuned for different subs they are still hitting hard not a bunch of rattle but, for what you pay for them they are good not great. Do i recommend them to any one on a budget yes.Almost for got o say in my 86 S10 Blazer* i do get some flex not a whole lot but some

*-any thing under 90's is still a steel body

12 of 15 found this helpful

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Daniel

Indio, CA

Overall
Durability
Value
Features
Design
Usability
happy customer

November 30, 2016

I can say that these subs hit pretty darn good in my 02 Silverado ,running on 4 ohm sealed box with a 2000.1 planet audio amp which is also not to bad of an amp,especially if you want to budget yourself.

0 of 0 found this helpful

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James

glenn heights, TX

Verified Purchase
Overall
Durability
Value
Features
Design
Usability
Good bang for your buck

October 14, 2015

I put this pair in a sealed box under the back seat of my 04 silverado and they sound amazing. They won't rattle the rear view mirror off, but still hit pretty hard. I wasn't wild about the spade terminals, but for $56 a pair I won't gripe to much about that. I have them running at 1ohm behind a memphis pr500.1 and a crappy dual head unit and they could definitely use more power.

0 of 1 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Venteded MDF Subwoofer Enclosure

12" Vented 3/4" MDF Enclosure Lined w/ Polyfil.

Your Price $54.99

NVX 25 ft. of True Spec 12 Gauge Speaker Wire

100% OFC wire with EnvyFlex metallic jacket insulates and protects against damage from extreme conditions.

Your Price $39.99

25 ft. of Streetwires 12 Gauge Speaker Cable

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

Your Price $37.85

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 $53.99

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 $64.87

Dynamat Sound Dampening Trunk Kit

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

Your Price $87.63

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

Car Stereo and Speaker Installation Tool Kit

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

Your Price $18.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

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

Your Price $74.99

12 oz. Can of Adhesive Spray

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

Your Price $8.97

Gold Plated Dual Terminal Banana Plug Connector

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

Your Price $1.99

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $6.99

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

1 Hifonics HFX12D4 Subwoofer Pair Combo Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 Hifonics HFX12D4 Subwoofer Pair Combo Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 Hifonics HFX12D4 Subwoofer Pair Combo Subwoofers

Mono Amp

4 Channel Amp

4 Hifonics HFX12D4 Subwoofer Pair Combo Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Items we think you might want
HFX12D4 main
Hifonics HFX12D4

• 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 $29.99

Browse 5 questions and 16 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
I chose these woofers because they were very affordable, but from the specs look like they perform well as well as the videos i saw
manuel m on Mar 27, 2016
need new subwoofers and they hit good
Sam C on Oct 11, 2015
good subs for the price.
Cedric E H on Oct 29, 2015
a friend had them and they sound really good!
Randall M on Oct 10, 2015
what subwoofers are built better the Rockford fosgate r1s or these hifonics ones?
A shopper on Sep 29, 2015
Best Answer: To keep it real with you man. The Hifonics built? It's alright; Sound quality? It's good for low or mid. I have the bass on low due to my hearing problem (I wear hearing aid). I only brought it as a temporary.

Rockford Fosgate R1s? I never own a Rockford Fosgate subwoofer before. If you're looking for a good system with a good sound quality. And don't care much about loud system. I would recommended you JL Audio W1v3 (currently owning it). The built is really nice. Sounds quality? It's awesome and sound clean better than Hifonics....

It's all depend how much you want to spend on a system or how loud you want. If you still decide to get Rockford Fosgate R1s.... Look up on youtube, If the sound quality is really good.... Go for it man.
Reply · Report · alan k on Sep 30, 2015
· Add Answer · I Have This Question Too (0)
Will this amp power 2 DVC 4ohms Subs? They are 400 watts RMS each.
Hunter K on Jan 1, 2016
Hifonics HFX12D4-PAIR
Hifonics HFX12D4-PAIR
Planet Audio AC1200.2
Planet Audio AC1200.2
Best Answer: yes, it should be plenty of power.
Reply · Report · Aaron B on Jan 14, 2016
· Add Answer · I Have This Question Too (0)
can this run 4 Hifonics HFX12D4 ?
Ashton H on May 5, 2015
Hifonics HFX12D4-PAIR
Hifonics HFX12D4-PAIR
Autotek MM1650.2
Autotek MM1650.2
Best Answer: Hello Ashton,

No. Take a look at the figures. Four HFX12D4 will require ~1600w RMS @ 2ohms. Such power will only be suitable for a Monoblock. So, find a monoblock that suggest it can do 1600w RMS @2ohms, like the Hifonics BRX2416.1D.
Reply · Report · Rick MStaff on May 5, 2015
· Add Answer · I Have This Question Too (0)
Can i use this sub (one only) with 1100 peak power and 330 rms power @ 4 ohm x1, amp?
A shopper on Nov 17, 2014
Hifonics HFX12D4-PAIR
Hifonics HFX12D4-PAIR
Hifonics HFX12D4
Hifonics HFX12D4
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

HFX12D4-PAIR

UPC

784644616352

Weight

19.00lbs

Internal SKU

hfx12d4-pair

Internal Product ID

39253

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 Subwoofer Pair Combo

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