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MB Quart ONX304SQ

12" Dual 4 ohm Square ONYX Series Car Subwoofer

2.7

(3 reviews)

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The Key to a Complete Onyx Audio System

New for 2011, the ONYX series of subwoofers are now available! These subwoofers are the perfect compliment to a set of MB Quart ONYX speakers and now allow for the installation of a complete ONYX audio system. With a variety of different configurations and sizes, you will be able to find the subwoofer that is right for you. Each feature a high gloss piano black finish and an optional illuminated dust cap. The MB Quart logo on the cone can be illuminated once the optional power/ground wires are connected near the speaker terminals. The finish of the woofers was designed to match that of the speakers and the amplifiers within the ONYX line. Get more bang for your buck with the MB Quart ONYX subwoofers.

  • 12" Dual 4 ohm ONYX Series Square Subwoofer
  • Power Handling:
    • Peak: 800 watts
    • RMS: 400 watts
  • 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 Specifications
Subwoofer SeriesONYX (MB Quart)
Subwoofer Size12"
Peak Power Handling800 watts
RMS Power Handling400 watts
Voice Coil(s)Dual
Impedance (Per Voice Coil)4 ohms
Frequency Response30 - 150 Hz
Sensitivity86 dB
Xmax (millimeters)9 mm
Subwoofer DesignSquare
Main Cone ColorBlack
Woofer CompositionPolypropylene
Woofer SurroundNitrile Butadiene Rubber (NBR)
Subwoofer GrilleNo
Re-Cone Kit AvailableNo
Recommended Enclosure Specifications
Recommended Enclosure TypePorted / Vented
Sealed
Minimum Sealed Box Volume1.5 cubic feet
Maximum Sealed Box Volume1.5 cubic feet
Minimum Ported Box Volume1.75 cubic feet
Maximum Ported Box Volume2.25 cubic feet
Top-Mount Depth5-15/16"
Cutout Diameter11-1/8"
Shallow Mount InstallationNo
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration1 year
Labor Warranty Duration1 year
Warranty ProviderManufacturer
Customer Review Summary for MB Quart ONX304SQ
Average Customer Rating is 2.7 out of 5 stars:
2.7
based on 3 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
.
.
33%
4 star:
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0%
3 star:
.
0%
2 star:
.
.
33%
1 star:
.
.
33%
what's this?
Average Attributes Rating:
Durability
2.3
Value
4.0
Features
2.7
Design
4.3
Usability
2.7
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
March 6, 2012 on of the best square sub, up there with kicker
Review by
Green Raven from Virginia Beach VA
Overall
Durability
Value
Features
Design
Usability
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.
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February 17, 2012 Horrible sub
Review by
Hoyta from Camden, NC
Overall
Durability
Value
Features
Design
Usability
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.
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September 5, 2011 Mb Quart square subwoofer
0 of 1 people found the following review helpful:
Review by
Jake from Michigan
Overall
Durability
Value
Features
Design
Usability
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.
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Speaker Wire
Choose from our recommended speaker wire to hook up your amplifier to your new subwoofer. The higher quality of speaker wire that it used for this connection, the better your subwoofer will sound.
 ProductPriceAdd?
15 ft. of 12 AWG StreetWires Speaker Wire15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.
$19.99
20 ft. of 12 AWG Kicker Speaker Wire20 ft. of 12 AWG Kicker Speaker Wire
Kicker uses twisted pair technology and hyper-flex cable to provide you with the cleanest sound and a simple installation.
$24.49
Sound Dampening Material
Get the most sound out of your new subwoofer with some high quality sound dampening material. It will keep the road noise out and the music inside the car.
 ProductPriceAdd?
Dynamat Rubber RollerDynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!
$18.99
Dynamat Extreme Bulk PackDynamat Extreme Bulk Pack
36 ft. Dynamat Xtreme Bulk Pack enhances the sound for your entire car!
$159.99
Enclosure Accessories
These accessories are designed to help you build the custom enclosure that you have always wanted, or add to the box that you already bought. Either way, these products can assist you in achieving better sound, better looks, and more bass!
 ProductPriceAdd?
20 oz. Bag of Poly-Fil20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.
$5.99
Spring Post Terminal CupSpring Post Terminal Cup
Makes adding a spring post terminal to an enclosure simple! Banana clip ready!
$2.99
Binding Post Terminal CupBinding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.
$2.99
Banana Clip TerminalsBanana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
 ProductPriceAdd?
AutoSound 2000 CD-101AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102AutoSound 2000 CD-102
High frequency test CD specifically designed for the set-up and evaluation of sound system imaging and placement.
$12.99
AutoSound 2000 CD-103AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99
Main Product
 ProductPriceAdd?
MB Quart ONX304SQMB Quart ONX304SQ$59.95

For more information on wiring subwoofers, visit our Subwoofer Wiring Guide: Subwoofer Wiring Guide

Product Summary

Manufacturer: MB Quart
Model number: ONX304SQ
UPC: 806576217817
Weight: 10.00 lbs
Internal SKU: onx304sq
Internal product ID: 33012

Price Information

$139.95

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$59.95

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Customer Testimonial

Sonic Electronix not only made sure I received my product and it was everything I wanted, but also shipped it very fast. Thanks!

- cm1lls from Auburn, CA

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