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Diamond Audio HP12
HEX PRO Series 12" subwoofer with dual 2-ohm voice coils
Item # 114HP12 | MFR # HP12
This item is no longer available.
Our take on the Diamond Audio HP12 by Crutchfield's 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.
Hexagonal honeycomb woofer
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
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.
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
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.
- 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
What's in the Box:
- 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
Features and Specs
|Impedance||1 ohm or 4 ohms|
|Cone Material||Kevlar aramid reinforced|
|Ideal Sealed Box Volume (cubic feet)||1|
|Ideal Ported Box Volume (cubic feet)||1.75|
|Port diameter (inches)||4|
|Port length (inches)||16|
|Dual Voice Coil||Yes|
85.4 dB at 2.83 volts
|Frequency Response||20 - 250 Hz|
|RMS Power Range (Watts)||800-160|
|Peak Power Handling (Watts)||1600|
|Top Mount Depth (inches)||7 7/8|
|Bottom Mount Depth (inches)||N/A|
|Cutout Diameter or Length (inches)||10 15/16|
|Parts Warranty||1 Year|
|Labor Warranty||1 Year|
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.
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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