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Crutchfield

Helix Precision P8W

8" 4-ohm subwoofer

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  • Helix Precision P8W

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  • Helix Precision P8W

  • Helix Precision P8W

  • Helix Precision P8W

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Our take on the Helix Precision P8W

by John Pollard
HELIX

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.

High-end bass

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.

Built tough

Helix was thinking a little outside the box when they designed the Precision P8W 8" 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 250 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. For best results, mount this subwoofer in a ported enclosure.

Highlights:

  • 8" 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: 100-250 watts RMS
  • peak power: 500 watts
  • sensitivity: 87.2 dB
  • top-mount depth: 4-9/16"
  • ported box volume: 0.48 cu. ft.
  • warranty: 2 years
  • Our 60-day money-back guarantee
 

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

Features and Specs
Size
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8 -inch
Impedance
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4 ohms
Cone Material
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Agave Sisalana
Surround Material
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Rubber
Ideal Sealed Box Volume (cubic feet)
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0.28
Ideal Ported Box Volume (cubic feet)
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0.48
Port diameter (inches)
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3
Port length (inches)
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5
Free-Air
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No
Dual Voice Coil
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No
Sensitivity
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87.2 dB at 1 watt
Frequency Response
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---
RMS Power Range (Watts)
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100-250
Peak Power Handling (Watts)
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500
Top Mount Depth (inches)
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4 9/16
Bottom Mount Depth (inches)
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5 1/8
Cutout Diameter or Length (inches)
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7 7/16
Vas (liters)
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18.4
Fs (Hz)
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41.6
Qts
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0.26
Xmax (millimeters)
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6
Parts Warranty
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2 Years
Labor Warranty
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2 Years
Product Research
What's in the box?

Download owner's manual

  • One 8" Subwoofer
  • Rubber gasket (installed)
  • Specification sheet (English/ German)

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

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.

Enclosure Compatibility

Sealed Box: Although designed for a ported enclosure, the P8W subwoofer can also be used in a sealed enclosure. The optimum internal volume is 0.28 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 0.48 cubic feet with a 3" diameter x 5" long port tube, giving a tuning frequency of 80 Hz and a -3dB point of 68 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.

Bandpass Box: When using a bandpass enclosure, the sealed rear chamber should be 0.58 cubic feet and the ported front chamber should be 0.26 cubic feet with a 2-3/4" diameter x 5-2/3" long port.

 
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Helix Precision P8W Reviews

Average Customer Review:

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4 out of 5

HELIX?????

Written By UFO, Chicago on Tuesday, July 17, 2012
 
At first I thought, hmmm Helix??? This guy is trying to sell me some cheap off brand stuff. I was WRONG, from the first hit of bass the sound was deeper and tighter than my old sub-woofer and that was a good sounding speaker. This one is just better.
Pros:
Quality and sound.
Cons:
None at this time.
1 out of 2 people found this helpful
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"Coolness Factor"
Build Quality
Ease of Use
Sound Quality
Value
 

Add accessories for the Helix Precision P8W

It's critical to have good wire, and none is included with the sub. See all categories & accessories

T-Spec 12-gauge Speaker Wire Black/white jacket — priced per foot
17 people say
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T-Spec 16-gauge Speaker Wire Black/white jacket — priced per foot
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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
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Dynamat SuperLite Tri-Pak Triple package — 3 sheets, 12 square feet (Model #10612)
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Dynamat 19100 License Frame Kit
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Dynamat Xtreme Wedge Pack 1 sheet, 4 square feet
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Dynamat Dynaliner One 54" x 32" sheet (1/8" thick)
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Speaker Grilles (8" waffle style)
33 people say
Your Price: $7.99
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Polyester Fiber Stuffing Make your subwoofer think it's in a bigger box (1-pound pack)
31 people say
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Metra Speaker Terminal Round terminal cup with binding post connectors (for do-it-yourself box builders)
8 people say
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Metra Box Carpet Carpet roll (54" x 5 yards) — available in 3 colors (Black)
14 people say
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2 people say
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Metra Speaker Terminal Square terminal cup with binding post connectors (for do-it-yourself box builders)
5 people say
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5 people say
Your Price: $9.99
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Metra Speaker Terminal Round terminal cup with spring clip connectors (for do-it-yourself box builders)
5 people say
Your Price: $3.99
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Grille Clamps (Front/top mount clamps)
11 people say
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Metra Speaker Terminal Square terminal cup with spring clip connectors (for do-it-yourself box builders)
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2 people say
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Port Tube 3" diameter, 4-1/2" long
1 person says
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Autosound 2000 Disc One Low Frequency Test CD (Disc One)
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Autosound 2000 Disc Four Amplifier Optimizer Test CD
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For a more in-depth review and enhanced detailed information on the Helix Precision P8W, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_975P8W/Helix-Precision-P8W.html ).