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Helix Blue B4X

4" 2-way car speakers

18 Reviews | 2 questions - 3 answers

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Item # 975B4X

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Overview

Our take on the Helix Blue B4X

Helix builds their low-profile Blue Series speakers to fit into more factory speaker locations while maintaining their high standards for sound quality. Helix earned its reputation by paying attention to the details, and these speakers really uphold the family name.

German engineering meets car audio

Helix builds their low-profile Blue Series speakers to fit into more factory speaker locations while maintaining their high standards for sound quality. Helix earned its reputation by paying attention to the details, and these speakers really uphold the family name.

Blue Series B4X 4

The drivers

You'll hear excellent high-frequency detail from the 1/2" Mylar dome tweeter, while the polypropylene woofer supplies solid midrange. If you want to enjoy the little details in your music without breaking the bank, you'll want to check out these Helix speakers. Grilles are included.

Installed on a 1979 240d Mercedes, They sound great.

Max C, Milwaukee, WI

What's in the Box:

  • Two 4" Coaxial speakers
  • 2 Grilles
  • 8 Speed clips
  • Eight 1" Self-tapping screws
  • 8 Mounting clips
  • Two 10' Lengths of speaker wire (female quick-slides on one end and tinned wire on other)
  • Instruction manual (English/ German)
  • Template

Product Highlights:

  • 4" 2-way speakers (pair)
  • injection-molded polypropylene woofer cone with urethane surround
  • 1/2" Mylar dome tweeter
  • power range: 5-25 watts RMS (75 watts peak power)
  • frequency response: 100-22,000 Hz
  • sensitivity: 89 dB
  • top-mount depth: 1-13/16"
  • grilles included
  • warranty: 2 years
  • Our 60-day money-back guarantee
Reviews

Helix Blue B4X Reviews

Average Customer Review(s):

(18 Reviews)
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Details

Hands-on research

Features and Specs

General
Speaker Size 4
Design 2-way
Tweeter Design 1/2" Dome
Tweeter Composition Mylar
Woofer Composition Injected Polypropylene
Woofer Surround Urethane Foam
Parts Warranty 2 Years
Labor Warranty 2 Years
Specifications
Sensitivity (1W at 1 meter) 89
Sensitivity at 2.83 volts N/A
Frequency Response 100 - 22k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 25
Peak Power Handling (Watts) 75
Impedance (Ohms) 4
Top-mount Depth (Inches) 1 13/16
Bottom-mount Depth (Inches) 2
Cutout Diameter or Length (inches) 3 5/8

Product Research

Features

Woofer Materials: Each woofer cone is made of Injection-Molded Polypropylene. This process of cone molding assures a uniform cone thickness for superior linearity and clarity. It is also lighter weight and more rigid for decreased distortion and improved bass response.

Mylar Tweeters: Each speaker has a 1/2" Mylar dome tweeter for clean, accurate highs.

Magnet cover: The B 4X are shipped with a rubber magnet cover to protect the speaker. If the cover is removed the depth changes slightly:

  • Top Mount Depth: 1.622"
  • Bottom Mount Depth: 1.815"

Removable Mounting Tabs: Most 4" factory speakers use four mounting screws, however, in some vehicles, only two are used. In these cases, you can bend the unnecessary mounting tabs until they break off. The B 4X also includes the mounting clips used in some older European cars (in this case, all four mounting tabs are removed). Care should be taken handling the speaker after any tabs are removed because the broken edges may be sharp.

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 verify what’s in the box, 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.

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Q & A

Customer Q&A

2 questions already asked

There is likely a limiting factor that prevents the other speakers from fitting. For details on installation please contact an Advisor by phone or online chat. They will be able to pull up your vehicle and give you the details on what you will need for an installation in your vehicle, and let you know the reasons why the other speakers will not fit. [ Jeff  Dec 23, 2013 ]  Staff
I just bought a 2014 2LT spark. I would like to replace the speakers only. so should I buy 6 of these? and will they all fit? Thank you for answering my question Linda T [ lindataylor813  Feb 04, 2014 ]
I do show these speakers as being a good fit for both locations while retaining the factory speaker grilles. [ Jeff  Dec 11, 2013 ]  Staff
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