Garage
Shop

See all parts that fit your 2012 750i

MB Quart ONX304SQ Subwoofer Pair Combo

Pair of 12" Dual 4 ohm Square ONYX Series Car Subwoofers

MB Quart
Shop all MB Quart
EXCLUSIVE
Product videos
highlight-star-icon

Pair of 12" ONYX Series Square Subwoofers • Dual 4 ohm • 800W Max • 800W RMS • Gloss Black Polypropylene Cone • NBR Surround • Spider Woven Tinsel Leads • Illuminated Dust Cap

Learn more about the onx304sq-pair

We apologize

This item has been discontinued


Loading...
CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

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

Limited time!
XAV-AX8500 main

Sony XAV-AX8500

10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wired Android Auto (SiriusXM Ready)

2
-20.20%

$798.00

List price $999.99

KDC-X305 main

Kenwood eXcelon KDC-X305

Single DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)

23
-17.08%

$199.00

List price $240.00

Kenwood eXcelon KMM-X705

Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)

6
-20.40%

$199.00

List price $250.00

DEH-S7200BHS main

Pioneer DEH-S7200BHS

Single DIN CD Receiver with Bluetooth, HD Radio and SiriusXM Ready

2
-10.72%

$249.99

List price $280.00

MVH-S322BT main

Pioneer MVH-S322BT

Single DIN Digital Media Receiver with Bluetooth and Amazon Alexa

7
-13.34%

$129.99

List price $150.00

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

Product Highlights


Pair of 12" ONYX Series Square Subwoofers • Dual 4 ohm • 800W Max • 800W RMS • Gloss Black Polypropylene Cone • NBR Surround • Spider Woven Tinsel Leads • Illuminated Dust Cap

Description


MB Quart brand icon

Authorized dealer

When One Is Just Not Enough

This combo features two 12" MB Quart ONX304SQ Dual 4 ohm ONYX series subwoofers. The subwoofers feature a combined RMS of 800 watts, giving you some real strong bass. The woofers are equipped with a black gloss polypropylene woofer cone and NBR rubber surround. The cone and surround materials will offer increased performance, rigidity, and strong power handling capabilities. The woofers also feature a large ferrite magnet structure for clean, efficient sound reproduction. Its square shape helps increase surface are, creating a deeper sounding bass.

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.

MB Quart ONX304SQ Features:
  • Pair of 12" Dual 4 ohm ONYX Series Square Subwoofers
  • Power Handling:
    • Peak: 1600 watts total / 800 watts each
    • RMS: 800 watts total / 400 watts each
  • Impedance: 4 ohm
  • Gloss black polypropylene cone
  • NBR surround
  • Red NOMEX spider woven tinsel leads
  • Spade terminals
  • Square cone design for greater bass output
  • Illuminated dust cap
  • Black steel frame
  • 2-1/2" Voice coil
  • Frequency response: 30-150 Hz
  • Sensitivity: 86 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Subwoofer Wiring Guide


Wiring Guide to Wire 1 MB Quart ONX304SQ Subwoofer Pair Combo Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 MB Quart ONX304SQ Subwoofer Pair Combo Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

Wiring Guide to Wire 3 MB Quart ONX304SQ Subwoofer Pair Combo Subwoofers

Mono Amp

4 Channel Amp

Wiring Guide to Wire 4 MB Quart ONX304SQ Subwoofer Pair Combo Subwoofers

Mono Amp

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
Series
ONYX Series
Subwoofer Size
12"
Peak Power Handling
800 watts
RMS Power Handling
400 watts
Voice Coil(s)
Dual
Impedance (Per Voice Coil)
4 ohm
Frequency Response
30 - 150 Hz
Sensitivity
86 dB
Xmax (millimeters)
9 mm
Subwoofer Design
Square
Main Cone Color
Black
Woofer Composition
Polypropylene
Woofer Surround
Nitrile Butadiene Rubber NBR
Subwoofer Grille
No
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Sealed
Minimum Sealed Box Volume
1.5 cubic feet
Maximum Sealed Box Volume
1.5 cubic feet
Minimum Ported Box Volume
1.75 cubic feet
Maximum Ported Box Volume
2.25 cubic feet
Top-Mount Depth (Mounting Depth)
5-15/16"
Cutout Diameter
11-1/8"
Shallow Mount Installation
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

ONX304SQ-PAIR

Weight:

20.00lbs

Internal SKU:

onx304sq-pair

Internal Product ID:

39263

Product and How-to Videos


Customer Ratings & Reviews


MB Quart ONX304SQ Subwoofer Pair Combo thumbnail image

5 star
50%
4 star
0%
3 star
0%
2 star
25%
1 star
25%



Durability
3
Value
4.3
Features
3.3
Design
4.5
Usability
3.3

Customer Reviews

Sort by:

Loading...

on of the best square sub, up there with kicker

The following review is for ONX304SQ, which is a part of the bundle you are viewing.

These speakers sound great if you have it weighed right. If you wire it to 2 ohms they can blow easy, if you wire it to 4 ohms your good to go. I had these for 3 years and still running strong. They sound better that MTX jackhammers. If you get these speakers you have to know what you are doing and take care of them and they wont let you down. You wont be able to hear yourself think.

By Green Raven on March 6, 2012

7 found this helpful


Amazing sub!

The following review is for ONX304SQ, which is a part of the bundle you are viewing.

Okay, listen the two who gave this sub a bad review are RETARDS, I have two of these as well as it's baby brother the 10, which I own two of as well and they hit so hard my entire ford ranger rattles. Good price for SQUARE 12's. I have ran them wide open for about 3 months now and never broke them in with all that test tone crap, I don't care for it, but any how these things hit so hard when listening to a heavy bass song it feels like a massage. My jeans literally vibrate and blow around because of how bad the air vibrates in the cab, DO NOT WIRE TO 2 OHM!!!! If you buy these you have to know to hook to 4 ohm if not they will blow in no time, they only make a 4 ohm model for this amp so READ the specs before you wire it up!!

By Kyle on September 27, 2012

6 found this helpful


Horrible sub

The following review is for ONX304SQ, which is a part of the bundle you are viewing.

DO not buy these subs. I looked at them and thought 12" square subs for cheap.... "not bad!". BOTH blew off my older alpine f707 within 20 mins. Super crappy sub.

By Hoyta on February 17, 2012

4 found this helpful


Mb Quart square subwoofer

The following review is for ONX304SQ, which is a part of the bundle you are viewing.

Hello, i had gotten this sub just to hold me over until i got a better setup. i looked into mb quart and they seemed like a nice brand. i hooked this up to my Alpine mrp-350. it puts out 350 watts rms at 2 ohms.. slightly lower then the subwoofer. So i wired the subwoofer to 2 ohms and hooked it up and having my gain at half and bass boost at three quarters. it blew within 10 minutes. i am sure this subwoofer is overrated however it did sound nice and hit hard when it was playing. Made from solid materials. just overrated.

By Jake on September 5, 2011

5 found this helpful




XQW124 2 Pack small

NVX XQW124 (BOGO 25% OFF)

Pair of 400W 12" X-Series Shallow Mount Dual 4 Ohm Car Subwoofers

(10)

$359.98

List price $999.98

44-HD99B small

Metra 44-HD99B

Black Replacement Antenna for 1993-Up Select Honda Del Sol

(5)

$36.99

List price $36.99

KMR-M315BT small

Kenwood KMR-M315BT

Single DIN Bluetooth In-Dash Digital Media Car Stereo w/ Siri Voice Control, Android USB Rapid Charge, Pandora/iHeartRadio App Ready for iPhone and Android and SiriusXM Ready

(3)

$99.99

List price $219.99

TS-A4103 small

Pioneer TS-A4103 Open Box Complete

4" x 10" 2-way A-Series Coaxial Car Speakers

$64.99

List price $124.99

Related Searches


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

2012 BMW 750i

2005 Toyota RAV4

1971 Triumph Spitfire

2008 Lexus ES350

2000 Cadillac DeVille

2022 Ram 1500

1999 GMC Yukon

1997 Toyota Corolla

1969 GMC C1500 Pickup

2006 Maserati Spyder

Vehicle
Store
Delete

1978 Suzuki SP370

2004 Harley Davidson FXSTSI Springer Softail

2002 Harley Davidson FLSTF/I Fat Boy

2007 Harley Davidson FXSTSSE Screamin Eagle Softail Springer

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.