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HELIX Blue B4X

4" 2-way car speakers

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  • HELIX Blue B4X

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Our take on the HELIX Blue B4X

by John Pollard
HELIX

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 Blue Series B4X 4" speakers make the most out of the power they're given, so they'll sound great paired up to an factory radio. But they can handle up to 25 watts RMS of real-world power, so hook them up with an aftermarket stereo or a small amp if you really want to bring them to life. The added power gets you better stereo separation, and your ears will thank you for the extra juice.

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.

See more info on this item

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

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

Features and Specs
General
Design
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2-way
Tweeter Design
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1/2" Dome
Tweeter Composition
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Mylar
Woofer Composition
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Injected Polypropylene
Woofer Surround
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Urethane Foam
Parts Warranty
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2 Years
Labor Warranty
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2 Years
Specifications
Sensitivity
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89 dB at 1 watt
Frequency Response
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100 - 22k Hz
RMS Power Range (Watts)
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5-25
Peak Power Handling (Watts)
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75
Impedance (Ohms)
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4
Top-mount Depth (Inches)
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1 13/16
Bottom-mount Depth (Inches)
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2
Cutout Diameter or Length (inches)
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3 5/8
Product Research
What's in the box?

Download owner's manual

  • 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

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

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.

 
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HELIX Blue B4X Reviews

Average Customer Review:

12 people say:

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Filter by rating:
5 out of 5

Helix blue bx4 speakers

Written By Terry, Lancaster pa on Tuesday, July 29, 2014
Crutchfield Customer Review (What's this?)
 
Very nice speakers. Crutchfield of course had it together and made it an easy install. That is why I only use Crutchfield. Great product and sounds great.
Pros:
Great product easy install
Cons:
Non
Was this review helpful?    Yes | No
 
5 out of 5

Worth the money

Written By Anonymous, Collegeville,Pa on Saturday, April 12, 2014
Crutchfield Customer Review (What's this?)
 
Sound far better than the stock units
Pros:
Value/ easy fit
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

HELIX Blue B4X Speakers

Written By Jim S., Ontario Ohio on Monday, February 17, 2014
Crutchfield Customer Review (What's this?)
 
Speakers are good quality and work as advertised.
Pros:
Easy to install even without model specific adapters.
Cons:
Some trimming of mounting tabs necessary for installation in Mercedes 300D.
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
4 out of 5

Great low profile

Written By DBA, David Abarr on Monday, August 19, 2013
Crutchfield Customer Review (What's this?)
 
Great low profile fit. Sound is ok. Not the best.
Pros:
Fit
Cons:
Sound
Was this review helpful?    Yes | No
 
5 out of 5

alot out of a little

Written By Alan H, Idyllwild, Ca on Sunday, August 04, 2013
Crutchfield Customer Review (What's this?)
 
what and amazing sound out of such a small speaker! although it was the only direct fit in the catalog, I was very impressed with the clarity and pureness of the sound.
Pros:
Pure clear highs
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

HELIX Blue B4X

Written By Chris, Columbia, MD on Monday, March 25, 2013
Crutchfield Customer Review (What's this?)
 
Way better then the stock speakers that came in my Spark. They are well worth the price.
Pros:
Fits easily into my Spark, Sound awesome!
Cons:
None
1 out of 1 people found this helpful
Was this review helpful?    Yes | No
 
4 out of 5

HELIX Blue B4X

Written By DanE, WA on Sunday, March 17, 2013
Crutchfield Customer Review (What's this?)
 
This is about your only choice for Mercedes W123 dash speakers. I installed these in my 1983 300D with some modification to the speaker. I had to trim the metal on one corner of the speakers. These sound excellent even with the OEM Becker radio.
Pros:
fit the holes in a Mercedes W123 dash
Cons:
Had to trim the metal on the speakers to fit properly
8 out of 8 people found this helpful
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5 out of 5

Installed in a 1983 Mercedes 300TD Wagon (Dash)

Written By Hugo T., San Marino, CA on Monday, December 31, 2012
Crutchfield Customer Review (What's this?)
 
So happy I found these German-made speakers that fit my 1983 Mercedes 300TD dash perfectly. For their size, they pack a punch and provide excellent bass.
Pros:
Perfect fit for Mercedes W123 chassis vehicles (dash) and also rear for W123 Wagons.
Cons:
None
3 out of 3 people found this helpful
Was this review helpful?    Yes | No
 
5 out of 5

review of HELIX BLUE B4X SPEAKERS

Written By WALT W., HIGHLAND FALLS , N.Y, on Sunday, December 16, 2012
Crutchfield Customer Review (What's this?)
 
PRODUCT WAS SHIPPED PROMPTLY, AND THE SOUND OUT OF THESE SPEAKERS IS REALLY AMAZING FOR THEIR SIZE.
Cons:
HAD TO BEND METAL IN OPENING TO FIT AND REMOVE RUBBER AROUND OUTSIDE OF SPEAKER TO INSTALL
5 out of 5 people found this helpful
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5 out of 5

HELIX Blue B4X

Written By Anonymous, louisville on Thursday, August 23, 2012
Crutchfield Customer Review (What's this?)
 
Sound awesome after install. fit perfectly but once again harness didn't address need for new connections and soldering. Had professional install (harness didn't match) but sounds great. Spent more on install that stereo and speakers.
1 out of 1 people found this helpful
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5 out of 5

Great sound

Written By Milt, Knoxville on Thursday, July 12, 2012
Crutchfield Customer Review (What's this?)
 
Drop in fit for the old Mercedes. Slound great. Rugged construction. Not made in China!
Pros:
Great sound, drop in fit as promised. Not made in China!
4 out of 7 people found this helpful
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5 out of 5

Porsche Boxster install

Written By 2004 Porsche Boxster, Laguna Beach, Ca on Sunday, July 08, 2012
Crutchfield Customer Review (What's this?)
 
I removed factory installed speaker then I took a dremal tool and cut the old speaker out of it's bracket and used it to remount the helix B4X speakers just break off the mounting ears on speaker an it fits right in Sound is great
5 out of 5 people found this helpful
Was this review helpful?    Yes | No
 

2 questions already asked

Why is this listed as the only speaker to fit the dash of an 82 MB 240D, when you offer many other 4" options? [ Joseph  Dec 22, 2013 ]
1 answer
  • 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 Staff  Dec 23, 2013 ]
will these fit a 1985 MB 190e in dash or rear deck and allow factory grills? [ splooey  Dec 11, 2013 ]
2 answers
  • 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 Staff  Dec 11, 2013 ]

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For a more in-depth review and enhanced detailed information on the HELIX Blue B4X, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_975B4X/HELIX-Blue-B4X.html ).