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Helix Precision P12W
12" 4-ohm subwoofer
Item # 975P12W | MFR # P12W
This item is no longer available.
Our take on the Helix Precision P12W by Crutchfield's John Pollard
Are you building a reference-level system in your vehicle? Helix created their Precision Series subwoofers for the mobile audiophile. Built from hand-picked components and assembled in Germany, these subs will create detailed low-end that perfectly complements a high-performance speaker system. From the tight, plucky punch of a bass guitar to the solid "thunk" of a kick drum, you'll be in sonic heaven with these subs.
Helix was thinking a little outside the box when they designed the Precision P12W 12" subwoofer. They used Agave sisalana, an incredibly stiff natural fiber, coated in silk to create a lightweight, rigid cone that reproduces low frequencies with unerring accuracy. Combine this unorthodox cone with a seriously oversized voice coil, and you have a woofer that will handle up to 350 watts RMS without breaking a sweat. A big rubber surround takes a lot of abuse, while the die-cast aluminum basket won't add a hint of coloration to your bass. Don't be afraid to turn this sub up.
To drive this single subwoofer, we recommend a mono amplifier rated between 260 and 525 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.
What's in the Box:
- One 12" Subwoofer
- Rubber gasket (installed)
- Specification sheet (English/ German)
- 12" subwoofer with 4-ohm voice coil
- silk-coated Agave sisalana woofer cone with rubber surround
- die-cast aluminum basket
- frequency response: not available
- power handling: 100-350 watts RMS
- peak power: 700 watts
- sensitivity: 87.3 dB
- top-mount depth: 5-9/16"
- sealed box volume: 0.75 cu. ft.
- ported box volume: 1.50 cu. ft.
- warranty: 2 years
- Our 60-day money-back guarantee
Features and Specs
|Cone Material||Agave Sisalana|
|Ideal Sealed Box Volume (cubic feet)||0.75|
|Ideal Ported Box Volume (cubic feet)||1.75|
|Port diameter (inches)||4|
|Port length (inches)||17|
|Dual Voice Coil||No|
87.3 dB at 1 watt
|RMS Power Range (Watts)||100-350|
|Peak Power Handling (Watts)||700|
|Top Mount Depth (inches)||5 9/16|
|Bottom Mount Depth (inches)||6 1/8|
|Cutout Diameter or Length (inches)||11 1/16|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Cone Design: The woofer uses a rigid sisal fiber cone with a durable rubber surround. The mechanical advantages of sisal, rigidity and inner damping, result in faster transients and precise detail.
Cast Aluminum Basket: The die-cast aluminum basket resists flexing and resonance (ringing).
Terminals: The woofer features a pair of spring post terminals. They accept pin connectors or bare wire up to 10-gauge.
Sealed Box: Although designed for a ported enclosure, the P 12W subwoofer can also be used in a sealed enclosure. The optimum internal volume is 0.75 cubic foot. Sealed enclosures provide the most control over a woofer, will handle a lot of power, and provide accurate sonic reproduction, making them suitable to all types of music.
Ported Box: The recommended ported box has an internal volume of 1.75 cubic feet with a 4" diameter x 17" long port tube, giving a tuning frequency of 34 Hz and a -3dB point of 34 Hz. Ported (or vented) enclosures typically provide better overall efficiency than sealed so they are suitable for use with smaller amplifiers, giving you more bass output from less power.
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