Why replace your car's original speakers?

The speakers that originally came in your car were made from inexpensive materials, designed to create acceptable sound at the lowest possible cost to the manufacturer. If you love music, you deserve better. Name-brand aftermarket speakers deliver fuller, richer sound with considerably more detail and nuance, and they're capable of playing louder and cleaner than factory speakers. Connect new speakers to your factory radio and you'll get the best possible sound from your dealer-equipped system. Pair them up with a new car stereo for a level of enjoyment that can rival a high-fidelity home audio experience.

Our take on the HELIX Blue B57X

by 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.

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 the little details in your music without breaking the bank, you'll want to check out these HELIX speakers. Grilles are included.

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Highlights:

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

Features and specs chart | What’s in the box? | In-depth notes

Features and Specs

General
Design Loading...	2-way
Tweeter Design Loading...	1/2" Dome
Tweeter Composition Loading...	Mylar
Woofer Composition Loading...	Injected Polypropylene
Woofer Surround Loading...	Rubber
Parts Warranty Loading...	2 Years
Labor Warranty Loading...	2 Years
Specifications
Sensitivity Loading...	91 dB at 1 watt
Frequency Response Loading...	60 - 22k Hz
RMS Power Range (Watts) Loading...	5-40
Peak Power Handling (Watts) Loading...	120
Impedance (Ohms) Loading...	4
Top-mount Depth (Inches) Loading...	2 1/4
Bottom-mount Depth (Inches) Loading...	2 5/8

Product Research

What's in the box?

Download owner's manual

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)
Template

Our Product Research Team

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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 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.