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Diamond Audio D312D4.2

D3 Series 12" subwoofer with dual 4-ohm voice coils

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Diamond Audio

Our take on the Diamond Audio D312D4.2

Rockin' D3 Series 12" sub

You hit the highway and crank the stereo, but your factory bass just can't keep up. Diamond Audio designed D3 Series subwoofers for high-performance bass in your car — you'll hear lots of heavy, powerful low notes that make for a very entertaining ride, even if it's just across town.

Exploded view

Heat dissipating woofer

This 12" D3 sub features a light, responsive copolymer cone and large-roll rubber surround for precise cone movement, so you can count on strong, accurate performance. The stamped aluminum dust cap directs heat away from the motor structure, and helps prevent heat from getting trapped in your subwoofer enclosure.


Aluminum voice coils stay cool

Interior cooling

Diamond Audio furnishes this sub with hefty 2-1/2" aluminum-coated copper voice coils that dissipate heat for extended power handling. Proprietary Venturi venting in the basket and pole piece funnels warm air away from the sub's interior, and that means the sub stays cooler and happier. The dual 4-ohm voice coils give you more options for wiring the sub into your system, and make it easy to add a second D3 sub later on.


Non-resonant basket resists distortion

The heavy-gauge stamped steel basket gives this sub the strength and stability it needs to rock hard for the lifetime of your system. Diamond Audio forms this basket using a unique stamping technique that virtually eliminates unwanted resonance, so your favorite music sounds just as the artist intended.


Diamond Audio goes the extra step

Dual spider assembly

In most subs, the spider assembly is glued to the basket. In D3 subs, Diamond Audio uses a dual spider assembly that is glued and screwed to the basket to virtually eliminate the possibility of mechanical failure.

Highlights:

  • 12" subwoofer with dual 4-ohm voice coils
  • textured copolymer cone with nitrile butadine rubber surround
  • heavy-gauge stamped steel basket
  • power range: 40-400 watts RMS (800 watts peak power)
  • frequency response: 25-250 Hz
  • sensitivity: 86.3 dB
  • top-mount depth: 6-9/16"
  • sealed box volume: 1.0 cubic feet
  • ported box volume: 2.0 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs

Features and Specs
Size
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12 -inch
Impedance
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4 ohms
Cone Material
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Textured copolymer
Surround Material
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NBR
Ideal Sealed Box Volume (cubic feet)
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1
Ideal Ported Box Volume (cubic feet)
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2
Port diameter (inches)
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4
Port length (inches)
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6
Free-Air
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No
Dual Voice Coil
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Yes
Sensitivity
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86.3 dB at 1 watt
Frequency Response
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25 - 250 Hz
RMS Power Range (Watts)
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40-400
Peak Power Handling (Watts)
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800
Top Mount Depth (inches)
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6 9/16
Bottom Mount Depth (inches)
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N/A
Cutout Diameter or Length (inches)
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11 1/16
Vas (liters)
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51.139
Fs (Hz)
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33.948
Qts
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0.564
Xmax (millimeters)
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11.9
Parts Warranty
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1 Year
Labor Warranty
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1 Year

Product Research

Product Research
What's in the box?

Download owner's manual

  • 12" Dual 4-ohm voice coil subwoofer
  • Rubber trim-ring (installed)
  • Installation manual

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Enclosure Compatibility

Features

Dual 4Ω Voice Coils: The D312D4.2 features dual 4Ω voice coils. When the voice coils are wired in parallel, the woofer presents a 2Ω load; when wired in series, the woofer presents an 8Ω load.

Cone: The textured copolymer cone has an aluminum dust cap to help draw heat away from the voice coil.

NBR Surround: The woofer features a Nitrile Butadiene Rubber (NBR) surround, a synthetic rubber that stands up to the harsh automotive environment.

Spring-Post Terminals: The spring-post terminals will accept pin connectors, single banana plugs, and bare wire up to 8-gauge.

Concealing Ring: The included rubber trim-ring provides a mounting gasket and gives the subwoofer a finished look.

Enclosure Compatibility

Sealed Enclosure: The recommended sealed box volume is 1.0 cubic feet.

Vented Enclosure: The recommended vented box volume is 2.0 cubic feet with a 4" diameter, 6" long port; resulting in a tuning frequency of 44 Hz. A 30 Hz sub-sonic filter is recommended for vented enclosures.

 

Product Reviews

 

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Learn more about Component Subwoofers

Learn more about Component Subwoofers

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Subwoofer Shopping Guide

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6/16/2003
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Dual voice coil subwoofers are a popular choice among car audio enthusiasts who want more flexibility in wiring their sound systems.

 
Subwoofer Enclosures

Subwoofer Enclosures

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The type of bass you get from your component subwoofer doesn't depend on the woofer alone. You'll need a strong, tightly constructed enclosure for optimum subwoofer performance.

 
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12/9/2011
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Having a subwoofer in your car is a good thing, but if the subwoofer isn't properly tuned, it won't sound as good as it should. This article describes how to adjust your amplifier so that your...

 

Accessories

Things you'll need

Sealed & Ported Boxes
Choose a sealed or ported box to house your subwoofer.
Sound Ordnance™ Bass Bunker
Sealed single 12" subwoofer enclosure (Model BB12-95S)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-200V)
$59.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Sealed dual 12" subwoofer enclosure (Model BB122-100S)
$79.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported dual 12" subwoofer enclosure (Model BB122-175V)
$79.99
In Stock
 
 
Sound Ordnance™ Bass Bunker
Ported single 12" subwoofer enclosure (Model BB12-150V)

Also available in:
Scratch & Dent: $50.99
$59.99
In Stock
 
 
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Accessories we recommend

Speaker Wire
It's critical to have good wire, and none is included with the sub.
StreetWires 12-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$1.00
In Stock
 
 
StreetWires 14-gauge Super Cable™ Speaker Wire
Translucent blue jacket — priced per foot (Clear)
$0.99
In Stock
 
 
StreetWires 14-gauge Ultra Cable™ Speaker Wire
Blue/copper jacket — priced per foot
$0.75
In Stock
 
 
StreetWires 16-gauge Super Cable™ Speaker Wire
Blue jacket — priced per foot
$0.40
In Stock
 
 
Stinger PRO Series 16-gauge Speaker Wire
Black jacket — priced per foot
$0.30
In Stock
 
 
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Dynamat
Reduce ambient road noise and your vehicle's "rattles," for better sound inside your car.
Dynamat Xtreme Trunk Kit
5 sheets, 20 square feet
$169.99
In Stock
 
 
Dynamat SuperLite Tri-Pak
Triple package — 3 sheets, 12 square feet (Model #10612)
$69.99
In Stock
 
 
Dynamat 19100
License Frame Kit
$14.99
In Stock
 
 
Dynamat Dynaliner
One 54" x 32" sheet (1/8" thick)
$69.99
In Stock
 
 
Dynamat Xtreme Wedge Pack
1 sheet, 4 square feet
$39.99
In Stock
 
 
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Grilles
Add a grille and keep your sub safe.
Speaker Grilles
(12" waffle style)

Also available in:
Scratch & Dent: $4.99
$9.99
In Stock
 
 
Box Hardware
These can be useful if you are building a custom box.
Rubber Feet
$5.99
In Stock
 
 
Corner Protectors
$9.99
In Stock
 
 
Springback Handle
$9.99
In Stock
 
 
Grille Clamps
(Front/top mount clamps)
$3.99
In Stock
 
 
Show more items
Speaker Wire Terminals
If you're building your own sub box, add speaker wire terminals for easy speaker wire connections.
Metra Speaker Terminal
Round terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with binding post connectors (for do-it-yourself box builders)
$9.99
In Stock
 
 
Metra Speaker Terminal
Round terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
Metra Speaker Terminal
Square terminal cup with spring clip connectors (for do-it-yourself box builders)
$3.99
In Stock
 
 
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Extras

Test Discs
Autosound 2000 discs are designed to test specific performance parameters of your vehicle's audio system.
Autosound 2000 Disc One
Low Frequency Test CD (Disc One)
$19.99
In Stock
 
 
Autosound 2000 Disc Four
$9.99
In Stock
 
 
Autosound 2000 CD Set
$69.95
In Stock
 
 
 
Add selected to cart
 

For a more in-depth review and enhanced detailed information on the Diamond Audio D312D4.2, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_114D312D42/Diamond-Audio-D312D4-2.html ).

Sorry, the Diamond Audio D312D4.2 is no longer available for purchase.

Diamond Audio D312D4.2