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Diamond Audio HP12

HEX PRO Series 12" subwoofer with dual 2-ohm voice coils

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Item# 114HP12 offer details

 
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Diamond Audio

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Our take on the Diamond Audio HP12

by Jo Greene

Diamond Audio's statement subwoofer

You're passionate about music — and sometimes it takes a sub of almost mythic proportions to get it right. Diamond Audio designed this monumental HEX PRO Series HP12 12" subwoofer for dead-on, accurate bass and extreme performance.

HEX PRO sub


Hexagonal honeycomb woofer

cone material

Proprietary honeycomb cone

This HEX PRO Series 12" sub features a unique honeycomb core, sandwiched between two thermally bonded layers of Kevlar, the same material used to make bulletproof vests. The resulting composite is exceptionally rigid, and also close to 70% lighter than conventional paper or polymer woofers. This featherlight cone can reproduce bass and midbass frequencies in your music with pinpoint accuracy.


Ultra-efficient motor assembly

cutaway shot

Neodymium magnet mounted
inside the voice coil

Engineers at Diamond Audio know that heat stresses a subwoofer, so they use several techniques to remove heat from the motor structure. The HEX Pro sub houses a high-temperature neodymium magnet inside its 3-1/2" voice coils, where aluminum frames act as a heat sink to draw damaging heat away from the magnet. A special thermal paste fills in the space between the voice coil and surrounding aluminum to insure optimal heat transfer.

Dustcap

Heat dissipating aluminum dustcap

The aluminum basket shunts off radiated heat quickly and efficiently. For even more relief from heat, an aluminum dust cap directs heat upwards and outwards, so it doesn't end up trapped in your subwoofer enclosure. A cool-running motor assembly means you'll get the cleanest, strongest performance from this woofer.


Non-resonant aluminum basket

Radial venting

Radial venting
on the cast aluminum frame

The cast aluminum basket gives this sub the stable foundation it needs to deliver faithful, uncolored bass for the lifetime of your system. Diamond Audio's proprietary O2 casting technique creates a denser, less porous basket that virtually eliminates unwanted resonance, so your favorite music sounds just as the artist intended.

Highlights:

  • 12" subwoofer with dual 2-ohm voice coils
  • Kevlar composite hexagonal honeycomb cone
  • nitrile butadine rubber surround
  • cast aluminum basket
  • power range: 80-800 watts RMS (1600 watts peak power)
  • frequency response: 20-250 Hz
  • sensitivity: 85.4 dB
  • top-mount depth: 8"
  • sealed box volume: 1.0 cubic feet
  • ported box volume: 1.75 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee
Shop all Diamond Audio Component Subwoofers
     

    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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    2 ohms
    Cone Material
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    Kevlar aramid reinforced
    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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    1.75
    Port diameter (inches)
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    4
    Port length (inches)
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    16
    Free-Air
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    No
    Dual Voice Coil
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    Yes
    Sensitivity
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    85.4 dB at 2.83 watts
    Frequency Response
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    20 - 250 Hz
    RMS Power Range (Watts)
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    800-160
    Peak Power Handling (Watts)
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    1600
    Top Mount Depth (inches)
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    7 7/8
    Bottom Mount Depth (inches)
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    N/A
    Cutout Diameter or Length (inches)
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    10 15/16
    Vas (liters)
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    36.178
    Fs (Hz)
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    24.964
    Qts
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    0.454
    Xmax (millimeters)
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    19
    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 2-ohm voice coil subwoofer
    • Rubber trim-ring (installed)
    • 3mm Allen wrench
    • Eight 1-1/8" Self-tapping screws
    • Installation manual
    • Cardboard template

    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 2Ω Voice Coils: The HP12 features dual 2Ω voice coils. When the voice coils are wired in parallel, the woofer presents a 1Ω load; when wired in series, the woofer presents a 4Ω load.

    TDX Technology: Diamond Audio's Thermal-Dyne eXtreme (TDX) is a system designed to eliminate the detrimental effects of heat on a speaker. The motor structure uses a Neodymium magnet mounted inside the voice coil; the geometry, venting, and material has been optimized to improve heat dissipation. The cast aluminum frame acts as a heat sink for the encapsulated motor structure. A special thermal paste is used between the motor case and aluminum frame to insure maximum heat transfer. The aluminum dust cap also acts as a heat sink for 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.

    Set-Screw Terminals: The set-screw terminals will accept bare wire up to 8-gauge. A 3mm Allen wrench is included to tighten/loosen the terminals.

    Concealing Ring: The included rubber trim-ring provides a mounting gasket and covers the mounting screws, giving the subwoofer a finished look.

    Enclosure Compatibility

    Sealed Enclosure: Two recommended sealed box volumes are listed in the manual; 1.0 cubic feet is given as the optimum size, and 2.0 cubic feet is labeled as a large enclosure.

    Vented Enclosure: The recommended vented box volume is 1.75 cubic feet with a 4" diameter, 16" long port; resulting in a tuning frequency of 35 Hz. A 30 Hz sub-sonic filter is recommended for vented enclosures.

     

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    Accessories

    Add accessories for the Diamond Audio HP12

    Choose a sealed or ported box to house your subwoofer. See all categories & accessories

    Sound Ordnance™ Bass Bunker Sealed single 12" subwoofer enclosure (Model BB12-95S)
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    Sound Ordnance™ Bass Bunker Ported single 12" subwoofer enclosure (Model BB12-200V)
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    Sound Ordnance™ Bass Bunker Sealed dual 12" subwoofer enclosure (Model BB122-100S)
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    Sound Ordnance™ Bass Bunker Ported dual 12" subwoofer enclosure (Model BB122-175V)
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    Sound Ordnance™ Bass Bunker Ported single 12" subwoofer enclosure (Model BB12-150V)
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    Sound Ordnance™ Bass Bunker Sealed single 12" subwoofer enclosure (Model BB12-125S)
    16 people say 
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    Sound Ordnance™ Bass Bunker Sealed dual 12" subwoofer enclosure (Model BB122-125S)
    13 people say 
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    StreetWires 16-gauge Super Cable™ Speaker Wire Blue jacket — priced per foot
    17 people say 
    Your Price: $0.49
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    StreetWires 14-gauge Super Cable™ Speaker Wire Translucent blue jacket — priced per foot (Clear)
    3 people say 
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    StreetWires 14-gauge Ultra Cable™ Speaker Wire Blue/copper jacket — priced per foot
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    StreetWires 12-gauge Ultra Cable™ Speaker Wire Blue/copper jacket — priced per foot
    56 people say 
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    Stinger PRO Series 16-gauge Speaker Wire Black jacket — priced per foot
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    Dynamat Xtreme Trunk Kit 5 sheets, 20 square feet
    11 people say 
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    Dynamat SuperLite Tri-Pak Triple package — 3 sheets, 12 square feet (Model #10612)
    7 people say 
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    Dynamat 19100 License Frame Kit
    8 people say 
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    Dynamat Dynaliner One 54" x 32" sheet (1/8" thick)
    2 people say 
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    Dynamat Xtreme Wedge Pack 1 sheet, 4 square feet
    3 people say 
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    Metra Speaker Terminal Round terminal cup with binding post connectors (for do-it-yourself box builders)
    2 people say 
    Your Price: $9.99
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    Metra Speaker Terminal Square terminal cup with binding post connectors (for do-it-yourself box builders)
    3 people say 
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    Metra Speaker Terminal Round terminal cup with spring clip connectors (for do-it-yourself box builders)
    3 people say 
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    Metra Speaker Terminal Square terminal cup with spring clip connectors (for do-it-yourself box builders)
    2 people say 
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    Your Price: $69.95

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    Smart people protect with SquareTrade- The best warranty at the best price

    SquareTrade Warranty
    SquareTrade Warranty 3 Year Warranty
    Your Price: $49.99
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    In business since 1999, SquareTrade is the largest independent warranty provider in the U.S.

    100% parts and labor - no deductibles

    All mechanical and electrical failures covered, includes normal wear and tear.

    Your item's repaired or the full item price returned withing 5 days

    Runs concurrent with manufacturer's warranty

    Rated 5-stars by consumers

    For a more in-depth review and enhanced detailed information on the Diamond Audio HP12, please visit the Crutchfield website product page (/S-1Nj7X5d3ohI/p_114HP12/Diamond-Audio-HP12.html ).

    Sorry, the Diamond Audio HP12 is no longer available for purchase.

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