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MB Quart ONX304

12" Dual 4 ohm ONYX Series Car Subwoofer

  • 3.2

(5 reviews)

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The product on this page is discontinued, but there is a newer model available:
Newer Model: MB Quart OWC304
MB Quart OWC304 thumbnail
$69.00 In Stock

Specials with this product

  • Free Ground Shipping to the 48 statesdetails

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Customer Testimonial

Wesley on the CCT was quick to respond to my questions and he provided an ETA to when my product will be shipped. Thank you for the great service.

- Chris from Los Angeles, CA

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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 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
  • Illuminated dust cap
  • Black steel frame
  • 2-1/2" Voice coil
  • Frequency response: 25-150 Hz
  • Sensitivity: 85 dB
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

MB Quart OWC304 thumbnail
(newest, current model)
MB Quart ONX304 thumbnail
(previous model, replaced by MB Quart OWC304)
MB Quart DWI-304 thumbnail
(previous model, replaced by MB Quart ONX304)
MB Quart DWH-304 thumbnail
(previous model, replaced by MB Quart DWI-304)
MB Quart DWG304 thumbnail
(previous model, replaced by MB Quart Discus DWH 304)
Subwoofer Specifications
Subwoofer Series ONYX (MB Quart)
Subwoofer Size 12"
Peak Power Handling 800 watts
RMS Power Handling 400 watts
Voice Coil(s) Dual
Impedance (Per Voice Coil) 4 ohms
Frequency Response 25 - 150 Hz
Sensitivity 85 dB
Xmax (millimeters) 9 mm
Subwoofer Design Round / Circle
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 1.25 cubic feet
Maximum Sealed Box Volume 1.25 cubic feet
Minimum Ported Box Volume 1.5 cubic feet
Maximum Ported Box Volume 2.0 cubic feet
Top-Mount Depth 5-3/4"
Cutout Diameter 11"
Shallow Mount Installation No
Warranty and Return Policy
Return Policy Standard Return Policy
Parts Warranty Duration 1 year
Labor Warranty Duration 1 year
Warranty Provider Manufacturer
Customer Review Summary for MB Quart ONX304
Average Customer Rating is 3.2 out of 5 stars:
  • 3.2
based on 5 Reviews
Share your thoughts with others:
Rating Distribution:
5 star:
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40%
4 star:
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0%
3 star:
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20%
2 star:
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20%
1 star:
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20%
what's this?
Average Attributes Rating:
Durability
  • 2.8
2.8
Value
  • 3.4
3.4
Features
  • 3.0
3.0
Design
  • 3.6
3.6
Usability
  • 3.4
3.4
what's this?
Quick Comparison:
Most Helpful Customer Reviews:
May 27, 2012 decent sub for its value
Review by
Tommy from San Francisco, CA
Overall
  • 3.0
Durability
  • 2.0
Value
  • 5.0
Features
  • 2.0
Design
  • 3.0
Usability
  • 5.0
I went on a limb and bought this sub during the Black Friday special. It was for my GF and it was going to be her first subwoofer set-up. I thought this sub will do the job fine being an entry level marketing tag. I had this sub powered with the Kenwood KAC-8105D and the sub ended up failing after 3 months. It was more than likely the amp was rated +100wrms more than the sub itself. I can assure the sub was properly broken in using test tones and minor CD/USB play. The sound quality was there but its nothing close to a bass slammer (ie: Alpine Type-R, Kick Solobaric, etc). I would NOT recommend this sub if you listen to hip-hop. I think it would work well with rock, classics, oldies, alternative, etc. It is NOT a hard hitter. You've been advised.
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July 16, 2011 Great Product.
Review by
Kevin from Windsor, ON, Canada
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I liked this sub alot so i went and bought another one so i will be running 2 ONX304 i can not wait to get it it is going to pound i recomend buying this sub for that price and can't beat it that is a steal in Canada that sub goes for a couple hundred.
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July 13, 2011 Great for the buck.
Review by
Kevin from Windsor, Canada
Overall
  • 5.0
Durability
  • 5.0
Value
  • 5.0
Features
  • 5.0
Design
  • 5.0
Usability
  • 5.0
I just got it and I put it in my box and took out my 12W6 JL older model and this sub sound's great nice bass I have it running by a mono amp MB Quart 1.400 formula so I give it a 5.
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May 14, 2012 Junk
0 of 2 people found the following review helpful:
Review by
Coolhand from Wisconsin
Overall
  • 1.0
Durability
  • 1.0
Value
  • 1.0
Features
  • 1.0
Design
  • 1.0
Usability
  • 1.0
Bought this to replace an MA Audio 12" Dual 4 ohm I had installed. I was hoping this would be better then that MA Audio, but it wasn't. This thing is very over rated for power. The bass is absolutely terrible no matter what kind of music I listen to. Thankfully I got it from here on a price match, that was the only positive I got from this product.
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August 31, 2011 Nice looking sub but...
0 of 2 people found the following review helpful:
Review by
kee lozz from brooklyn, NY
Overall
  • 2.0
Durability
  • 1.0
Value
  • 1.0
Features
  • 2.0
Design
  • 4.0
Usability
  • 1.0
The sub is very nice looking but it's power handling specifications are seriously over rated. I bought four and i am now returning all of them.
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Empty Enclosures
Every subwoofer needs an enclosure to mount in and these high quality boxes are perfect for your new woofer! After a quick installation, you'll be ready for some real bass in your car!
  Product Price Add?
Ported Subwoofer Enclosure Ported Subwoofer Enclosure
Single 12" ported/vented enclosure carpeted black and made with solid 3/4" MDF.
$54.99
Ported Subwoofer Enclosure Ported Subwoofer Enclosure
Dual 12" ported/vented enclosure carpeted gray and made with solid 3/4" MDF.
$79.99
Subwoofer Grilles
Protect your subwoofer while making your enclosure look great! These subwoofer grilles are the perfect addition to your new subwoofer.
  Product Price Add?
12" Universal Subwoofer Grille 12" Universal Subwoofer Grille
Protect your subwoofer with this aluminum grille that is simple to install.
$18.99
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.
  Product Price Add?
15 ft. of 12 AWG StreetWires Speaker Wire 15 ft. of 12 AWG StreetWires Speaker Wire
This SuperCable from StreetWires is a noise free link between your amplifier and your subwoofer.
$24.99
20 ft. of 12 AWG Kicker Speaker Wire 20 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.
$34.95
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.
  Product Price Add?
Dynamat Rubber Roller Dynamat Rubber Roller
Install your Dynamat with ease! This heavy duty rubber roller is designed specifically to install your Dynamat!
$18.99
Dynamat Extreme Bulk Pack Dynamat 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!
  Product Price Add?
20 oz. Bag of Poly-Fil 20 oz. Bag of Poly-Fil
Polyester fiber fiberfill adds better bass to your system.
$5.99
16 oz. Can of Adhesive Spray 16 oz. Can of Adhesive Spray
Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.
$6.99
Binding Post Terminal Cup Binding Post Terminal Cup
Use this to easily install a binding post terminal to your subwoofer enclosure.
$4.99
Banana Clip Terminals Banana Clip Terminals
These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.
$4.99
Installation, Tools & Accessories
Don't forget to get the tools and accessories that will help you install your new subwoofer in your vehicle. Whether you opt for the professional installation card or the do-it-yourself method, you will need the following to help you out!
  Product Price Add?
Car Stereo and Speaker / Subwoofer Installation Tool Kit Car Stereo and Speaker / Subwoofer Installation Tool Kit
Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.
$14.99
System Optimization and Tuning
Use these items to assist in testing and tuning your new car audio system to perfection!
  Product Price Add?
Scosche SPL Meter Scosche SPL Meter
Monitor the noise level of your new car audio system with this SPL meter measuring from 60-135 dB.
$24.99
AutoSound 2000 CD-101 AutoSound 2000 CD-101
Low frequency test CD
$12.99
AutoSound 2000 CD-102 AutoSound 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-103 AutoSound 2000 CD-103
Audiophile reference series test disc for evaluation of all audio components.
$12.99

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

Product Summary

Manufacturer: MB Quart
Model number: ONX304
UPC: 806576217589
Weight: 9.65 lbs
Internal SKU: onx304
Internal product ID: 33010