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Helix Blue B57X
5"x7" 2-way car speakers
Our take on the Helix Blue B57X by Crutchfield's John Pollard
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 B57X 5"x7" 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.
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 the little details in your music without breaking the bank, you'll want to check out these Helix speakers. Grilles are included.
After blowing one of my more expensive kicker speakers the Crutchfield rep suggested this brand. They were less expensive and I had never heard of them but their quality of build and sound surpassed my expectations. They are being powered by an Alpine head unit
Ruth, Columbus Ohio
What's in the Box:
- Two 2-way speakers
- 2 Foam gaskets
- 2 Grilles
- 2 Grille frames
- 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)
- 5"x7" 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: 2-1/4"
- grilles included
- warranty: 2 years
- Our 60-day money-back guarantee
Helix Blue B57X Reviews
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Features and Specs
|Tweeter Design||1/2" Dome|
|Woofer Composition||Injected Polypropylene|
|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 1/4|
|Bottom-mount Depth (Inches)||2 5/8|
|Cutout Diameter or Length (inches)||0|
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 57X are shipped with a rubber magnet cover to protect the speaker. If the cover is removed the depth changes slightly:
- Top Mount Depth: 2.175"
- Bottom Mount Depth: 2.519"
Size Classification Note: Helix (Audiotec Fischer) calls this speaker a 5x7, but it also fits many 6x8 installation applications. Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.
Our Product Research Team
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