Garage
Shop

See all parts that fit your 2015 528i xDrive

Hifonics HF12S4

HF Series Single 4 ohms 12" Subwoofer (HF 12S4)

Hifonics
Shop all Hifonics
Product videos
highlight-star-icon

12" Single 4 Ohm HF Series Subwoofer • 350W RMS • 700W Peak • silver laminate cone • multi-layer high temperature voice coil • rubber surround • spider tinsel-lead design • push and insert wire terminals

Learn more about the hf12s4

Good news and a little bad...

This item has been discontinued

But you may be interested in the newest model that's available.

hfi12s4 thumbnail

Hifonics HFi 12S4

OUR PRICE: $44.99

View item

Loading...
CVP8 main

Cerwin-Vega CVP8 (Sold Individually)

350W Peak (170W RMS) 8" CVPRO Series Pro Full Range 4-ohm Speaker

-16.67%

$49.99

List price $59.99

TS-A1081F main

Pioneer TS-A1081F

460W Peak (100W RMS) 4” A Series 2-way 4-ohm Coaxial Car Speakers

3
-18.18%

$90.00

List price $110.00

DB402 main

Polk Audio DB402 (DB 402)

270W Peak (90W RMS) 4" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

4
-9.99%

$90.00

List price $99.99

C1-400x main

JL Audio C1-400x

70W RMS 4" C1 Series 2 Way Coaxial 4-ohm Car Speakers

8
EPICPRO8X main

AudioControl EPICPRO8X

700W Peak (500W RMS) 8" Epic Pro Series Pro Audio Midrange 4-ohm Speakers

ZXI-44 main

DS18 ZXI-44

300W Peak (100W RMS) 4" ZXI Series 2-way 4-ohm Coaxial Car Speakers

H80C main

Cerwin-Vega H80C

900W Peak (300W RMS) 8" HED Series 2 Way Component 4-ohm Speaker System

-16.67%

$219.99

List price $263.99

51KSC404 main

Kicker KSC4 (51KSC404)

300W Peak (150W RMS) 4" KS Series 2 Way Coaxial 4-ohm Speakers

3
-16.67%

$99.99

List price $119.99

No picture

Diamond Audio DMDX8

390W Peak (130W RMS) 8" DMDX Series 2-Way Cocentric Coaxial Car Speakers

REF4032CFXAM main

Infinity Reference REF-4032cfx (REF4032CFXAM)

210W Peak (70W RMS) 4" Reference Series 2 Way Coaxial 3-ohm Speakers

1
-42.84%

$79.99

List price $139.95

Product Highlights


12" Single 4 Ohm HF Series Subwoofer • 350W RMS • 700W Peak • silver laminate cone • multi-layer high temperature voice coil • rubber surround • spider tinsel-lead design • push and insert wire terminals

Description


Hifonics brand icon

Authorized dealer

  • 12" Single 4 Ohm HF Series Subwoofer
  • Power Handling:
    • 350 watts RMS
    • 700 watts Peak
  • Impedance: Single 4 ohm
  • Low-Q, Theile/Small parameters perfect for small sealed or vented enclosure designs
  • Polypropylene Dustcap
  • High-Energy Magnet
  • For Ported or Sealed Enclosures
  • Silver Laminate Cone
  • Chrome Speaker Frame
  • Multi-Layer High Temperature Voice Coil
  • Front Plate and Voice Coil Cooling
  • Integrated Spider Tinsel-Lead Design
  • High Excursion Rubber Surround
  • High Strength Suspension Material
  • Push and Insert Wire Terminals
  • 1-year SonicElectronix.com warranty

Product history:

Hifonics HFi12S4 thumbnail
(newest, current model)
Hifonics HF12S4 thumbnail
(previous model, replaced by Hifonics HFi 12S4)

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Hifonics HF12S4 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Hifonics HF12S4 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Hifonics HF12S4 Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Hifonics HF12S4 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp


Best selling similar products

Marine Club 12 small

JBL CB122 Club Marine 12

• Peak Power: 1200 watts
• RMS Power: 400 watts
• Polypropylene Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 7-13/16"
• Sensitivity: 89 dB

(1)

$119.95

List price $379.95

VCW124v3 small

NVX VCW124 Version 3 (VCW124v3)

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Enhanced Non-Pressed Paper Cone
• Custom High Roll Foam Surround with black nylon stitching
• Mount depth: 7.02"
• Sensitivity: 85 dB (1W/1m)

(132)

$239.99

List price $287.99

SQW124 small

NVX SQW124

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.51"
• Sensitivity: 84 dB

$299.99

List price $359.99

Specifications & Details


Subwoofer Specifications
Subwoofer Size
12"
Peak Power Handling
700 watts
RMS Power Handling
350 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohm
Woofer Surround
Rubber

Item Details


Manufacturer:

Model Number:

HF12S4

Weight:

12.00lbs

Internal SKU:

hf12s4

Internal Product ID:

7223

Product and How-to Videos


Customer Ratings & Reviews


Hifonics HF12S4 thumbnail image

5 star
60%
4 star
40%
3 star
0%
2 star
0%
1 star
0%



Durability
4.6
Value
4.6
Features
4
Design
4.6
Usability
4.8

Customer Reviews

Sort by:

Loading...

Wow

i had one of these in a single ported box for about 7 months and wow did it bump, it is a really good sub for the price

By ryan on July 10, 2008

6 found this helpful


Bumps

I have two of these in a custom sealed box powered by a 1000w Crunch mono amp and it sits in the trunk of my S.L.A.B.. It hits nice, loud, and clean inside the car and you can hear it coming a block down. I'd recommend it to anyone.

By Daniel on January 23, 2008

6 found this helpful


Hifonics

This sub hits hard. I have one in a custom box and people were hearing me from a block down, it was setup up with a 1100 w MOMO Panasonic PYU1003 amp. Knocks HARD!

By Marek on December 20, 2007

6 found this helpful


HARD HITTERS!!!!!!

These subs hit hard believe me i have 2 of these with a crunch 1000 watt amp, and they just kill!! As a matter of fact I can't turn my stereo up really high because, everything just shakes and I cant hear. But, these subs are clear and basically a steal for 30 dollars!!

By ricardo on April 10, 2008

4 found this helpful


BEST BUY!!!!!!!!!!

Straight up power!!!!! for $30 these are the best subs I've ever had, better than other $100 subs I have had.

By Zack on January 31, 2008

2 found this helpful




CVEM79PUR small

Coby CVEM79PUR High-Performance Isolation In-Ear Stereo Headphones (Purple)

Purple High-Performance Sound Isolation Stereo Earphones

$11.95

List price $14.99

12TW5-3 small

JL Audio 12TW5-3

12" Single 3 ohms TW5 Thin-Line Subwoofer

$319.99

List price $469.99

HAFR6R small

JVC HAFR6R (HA-FR6-R) Gummy Plus Earbuds In-Ear Headphones - Red

Gummy Plus In-Ear Headphones/Earbuds w/ Microphone and Remote (Red)

$8.99

List price $14.95

P9745B small

Planet Audio P9745B-OPEN BOX

In-Dash Double DIN DVD, CD, MP3 Receiver w/ 7" Touchscreen Monitor, Built-in Bluetooth and Front USB and Aux-in

$154.95

List price $428.99

C5-075ct-RP small

JL Audio C5-075ct-RP

0.75" (19mm) Evolution C5 Series Silk Soft-Dome Tweeters

(6)

$169.95

List price $189.95

BULLET SHADE small

Aerial7 Bullet (Shade)

Bullet Series In-Ear Headphones Multi-Device Stereo Earbuds

(1)

$8.99

List price $20.00

CR1400.2 small

Sound Storm SSL CR1400.2

1400W Max, 2-Channel Cruiser Series Amplifier

(1)

$104.99

List price $199.99

ZXi683 small

Hifonics Zeus ZXi 683

Zeus ZXi 6" x 8" 3-way Speakers (ZXi683)

(16)

$42.95

List price $99.99

IEM856MD small

Scosche IEM856MD - Black

10.7mm Dynamic Drivers with 6.3mm Balanced Armature Driver and tapLine III Remote and Controler

$59.99

List price $299.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2015 BMW 528i xDrive

1998 BMW 750iL

2005 Nissan Maxima

2003 Ford Focus ZX5

2025 Ford Ranger

2010 Subaru Forester

2011 Dodge Durango

2011 Aston Martin DB9

2000 GMC Safari

2005 Kia Spectra

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.