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Helix Blue B6X

6-3/4" 2-way car speakers

12 Reviews

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Item # 975B6X

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Our take on the Helix Blue B6X

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.

Helix Blue B6X

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.

The Blue Series B6X 6-3/4" speakers make the most out of the power they're given, so they'll sound great paired up to an aftermarket car stereo. But they can handle up to 40 watts RMS of real-world power, so hook them up with an external amplifier if you really want to bring them to life. The added power gets you better bass and more accurate 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, punchy bass. If you want to enjoy all the little details in your music without breaking the bank, you'll want to check out these Helix speakers. Grilles are included.

Note: Helix describes this model as a 6-1/2" speaker. Most manufacturers designate this same frame size as a 6-3/4" speaker. For simplicity's sake we list it as a 6-3/4" speaker.

Product Highlights:

  • 6-3/4" 2-way speakers (pair)
  • injection-molded polypropylene woofer cone with urethane surround
  • 1/2" Mylar dome tweeter
  • power range: 5-40 watts RMS (120 watts peak power)
  • frequency response: 60-22,000 Hz
  • sensitivity: 91 dB
  • top-mount depth: 2-5/16"
  • grilles included
  • warranty: 2 years
  • Our 60-day money-back guarantee

Big improvement over stock. Crutchfield had these on sale for a great price and sound from these speakers are great without the Boom Mat speaker inserts I purchased.

Suburban Sasquatch, Hawaii

What's in the Box:

  • Two 2-way speakers
  • 2 Grilles
  • 8 Speed clips
  • Eight 1" Self-tapping screws
  • Two 5' Lengths of speaker wire (female quick-slides on one end and tinned wire on other)
  • Instruction manual (English/ German)
  • Template

Helix Blue B6X Reviews

Average Customer Review(s):

(12 Reviews)

Sounds Great

Suburban Sasquatch from Hawaii on 10/6/2015

2015 Kia Forte
Crutchfield Customer Review (What's this?)

Big improvement over stock. Crutchfield had these on sale for a great price and sound from these speakers are great without the Boom Mat speaker inserts I purchased.

Pros: Great sound and bass response is ok for some door speakers, be sure to not use Boom Mat speaker inserts.

Cons: None

Helix Blue B6X

Anonymous from Twentynine palms, CA on 3/25/2015

2013 Hyundai Sonata GLS
Crutchfield Customer Review (What's this?)

No bass if that's what you're looking for, but what do you expect with a low frequency of 60hz. Great sounding highs. Wasnt really what I was looking for but was the only decent speakers that would fit in the front doors of my car.

Pros: Crisp highs

Cons: Awful lows

Great Speakers

Steve from Colorado on 3/20/2015

1996 Toyota 4Runner
Crutchfield Customer Review (What's this?)

After listening to the great sounds from the Helix Blue 5.25" speakers that I purchased earlier from Crutchfield for the rear doors of my 1996 Toyota 4Runner Limited, I just had to complete the set with a pair of 6.75" for the front doors. BIG difference in sound quality - highs and lows! I also have a set of 5.25" Helix Esprit in the doors and Helix Esprit 3Way 6"x9" speakers in the rear of my 1986 Corvette. No need for extra tweeters or a sub woofer! I am convinced that Helix makes the best and most reliable speakers for my hard earned dollar!

Pros: Perfect fit, perfect sound, great quality for a great price!

Cons: Absolutely none whatsoever.

Helix blue speakers

Anthony from Florida on 3/2/2015

2009 Scion tC
Crutchfield Customer Review (What's this?)

The speakers are really nice. came very organized and timely, also straight forward instructions. Thanks for the speakers and great customer service help.

Pros: Everything

Cons: Nothing I could find

Excellent speakers

Anonymous from Arizona on 2/23/2015

2000 Toyota Tundra
Crutchfield Customer Review (What's this?)

Great speakers for the price and amazing sound quality.



Drop In replacement - So much Better

Geo. C. from California on 1/21/2015

1995 Nissan Maxima
Crutchfield Customer Review (What's this?)

These were one of the suggested replacements in my 1995 Nissan Maxima. I replaced both front and rear sets. The speakers were a drop-in replacement, with the adapter wiring harnesses. The speakers themselves are such a big improvement over the original speakers. Seeing as how they were 20-years old now - almost anything would be an improvement. These two-way speakers with polypropylene bass cones should last at least another 20 years! Also - the printed directions, the MasterSheet, helped me a lot. The rear speakers were kind of a pain to replace - just because they originals were mounted on top of the rear deck. I thought about mounting the new ones from below - but the screws would have been very noticeable....

Pros: Perfect match for my car. Direct replacement. Sound super now.

Cons: I find nothing wrong with these speakers.


Alex from Alpharetta, GA on 1/4/2015

2004 Pontiac Vibe
Crutchfield Customer Review (What's this?)

They sound good. Expected more because of the description. But, good.

Pros: Good Sound

Cons: Need an Amp for better sound.

Horrible speakers

Jon from Milton, WA on 10/5/2014

2010 Harley Davidson Street Glide
Crutchfield Customer Review (What's this?)

Put these in a 2010 street glide street glide with a kenwood head unit and small Rockford amp. Sounded okay but one bump in the road caused one to completely fail. No problem with the return and alpine type R that replaced them sound 100x better

Pros: None

Cons: Cheap junk

Helix Blue B6X

Anonymous from Brunswick GA on 8/20/2014

Crutchfield Customer Review (What's this?)

very efficient, very low power demands.

Pros: very efficient, no need for a separate amp, just get a powerful receiver and flat sub woofer amp combo.


Clear sounding

Craig from Baltimore,MD on 1/19/2014

Crutchfield Customer Review (What's this?)

The sound is clear but the base is absent. These speakers were purchased to replace a set of 8" round speakers with center tweeter. Initial sound quailty is good, but there is a marker loss of bass in the sound system. I'm hoping that when they are used for awhile, they will loosen up and produce more bass response.

Pros: Easy to install with great sound quality

Cons: Poor bass response.

good replacement speakers

ldrmanbgft from Stuarts Draft VA on 4/21/2013

Good replacement speakers for my 98 Volvo V70 XC AWD. A whole lot better than stock speakers. Got decent bass, but, if you want thumping bass, get a seperate sub-woofer, as I plan to do in the near future. Overall, I am very satisfied. Thanks Crutchfield!!



Great sound

Matt W from Melbourne FL on 8/9/2012

Crutchfield Customer Review (What's this?)

These were the missing piece in my 2011 Tacoma. My stereo system sounded pretty good before with new head unit and subs but the real clarity in the music came after installing these!

Pros: Great sound Easy installation with Crutchfield's instruction sheets

Cons: None found yet


Hands-on research

Features and Specs

Speaker Size
Design 2-way
Tweeter Design 1/2" Dome
Impedance (Ohms) 4
Tweeter Composition Mylar
Woofer Composition Injected Polypropylene
Woofer Surround Urethane Foam
Parts Warranty 2 Years
Labor Warranty 2 Years
Sensitivity (1W at 1 meter) 91
Sensitivity at 2.83 volts N/A
Frequency Response 60 - 22k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 40
Peak Power Handling (Watts) 120
Top-mount Depth (Inches) 2 5/16
Bottom-mount Depth (Inches) 2 1/2
Cutout Diameter or Length (inches) 5 5/8

Product Research


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 6X are shipped with a rubber magnet cover to protect the speaker. If the cover is removed the depth changes slightly:

  • Top Mount Depth: 2.229"
  • Bottom Mount Depth: 2.393"

Size Classification Note: Crutchfield has traditionally referred to this size speaker as a 6-3/4", while some manufacturers, including Helix (Audiotec Fischer), call it a 6-1/2". Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.

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.