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Helix Blue B52C

5-1/4" component speaker system

4 Reviews

Item #: 975B52C

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Helix Esprit E52C




Our take on the Helix Blue B52C

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 B52C

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 B52C 5-1/4" component speakers 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" silk dome tweeter, while the polypropylene woofer supplies solid, punchy bass. The external crossover network keeps the right frequencies going to these two drivers. 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.

Excellent product and ship time!

Dana, Inverness, FL

What's in the Box:

  • 2 Woofers
  • 2 Grilles
  • 2 Tweeters (each has 5" speaker lead attached)
  • 2 Flush-mount tweeter housing tops
  • 2 Surface-mount tweeter housing tops
  • 2 Angled tweeter mount bases
  • 2 Flat tweeter mount bases
  • 2 Metal flush-mount clamps
  • 2 Crossovers (each has 38" output leads for the tweeter and woofer attached)
  • Two 47" lengths of speaker wire
  • Eight 1" Self-tapping screws
  • Four 1/2" Self-tapping screws
  • 8 Speed clips
  • Four M4x10mm Flat head machine screws
  • 4 Flat washers
  • Four M4 Nuts
  • 2 Adhesive pads
  • Instruction manual (English/ German)
  • Woofer template

Product Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 crossovers
  • 5-1/4" injection-molded polypropylene woofer cone with rubber surround
  • 1" silk dome tweeter
  • 2-way external crossover network
  • power range: 5-40 watts RMS (120 watts peak power)
  • frequency response: 65-25,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 2-1/16"
  • grilles included
  • warranty: 2 years
  • Our 60-day money-back guarantee

Helix Blue B52C

Average Customer Review(s):

(4 Reviews)

Helix Blue B52C

Dana from Inverness, FL on 3/27/2015

2005 Cadillac CTS
Crutchfield Customer Review (What's this?)

Excellent product and ship time!

Pros: Very clean sound.

Cons: None

Nice mids and highs

wolf from pittsburgh on 8/7/2013

2011 Subaru Legacy
Crutchfield Customer Review (What's this?)

Tried putting these in my subaru legacy in the front doors and dash speaker (tweeter) slots. Had to build harnesses for the tweeters, but the woofers went in the doors without issue. Despite the low peak RMS, these bad boys really sounded like garbage before I threw a clarion amp in the dash to power them. Mids and highs sound great, but bass lacks (as to be expected. from 5.25 speakers). The tweeters are loud, but they aren't harsh. I have my eq at -10 treble to compensate, which is a bit much. Mids sound great. Overall bass and treble aren't quite there. I need bass to "go to 11" and treble to "go to-11" for this to sound perfect. Not sure if I want to replace these, or try foam over the tweeter grill, and subs in the rear...

Pros: Clear, warm mids. Tweeters are loud, but not abrasive

Cons: Tweeters are too loud. Woofers don't have much bass, and it's easy to push them too hard, even with a 50 watt rms amp.

Grandpa's toy

Jeff from 85641 on 5/15/2013

Crutchfield Customer Review (What's this?)

Great sound for what you expect .

Pros: Easy install

Cons: None

HELIX Blue B52C review

Matt from Texas on 9/25/2012

1982 Jeep CJ7
Crutchfield Customer Review (What's this?)

I put these speaker in a Jeep because these are listed. They sound great. The fit great into a CJ7 and flush against the dash. Mid Bass levels add a kick to the front audio experience and the tweeters add the highs. Crystal clear sound from these and built well. Should be lasting enjoyment. One tweeter and one crossover didn't work. Crutchfield send me another set of speaker and I was good to go. I am very pleased with these and they add great sound....even for a jeep!

Pros: Easy install, built well and clear highs and great mid levels.

Cons: Tweeter and crossover was not working but they sent replacements.


Hands-on research

Features and Specs

Speaker Size 5 1/4
Design 2-way
Tweeter Design 1" Dome
Tweeter Composition Silk
Woofer Composition Injected Polypropylene
Woofer Surround Rubber
Parts Warranty 2 Years
Labor Warranty 2 Years
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 65 - 25k Hz
Minimum RMS Wattage 5
Maximum RMS Wattage 40
Peak Power Handling (Watts) 120
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 1/16
Bottom-mount Depth (Inches) 2 5/16
Cutout Diameter or Length (inches) 4 3/4

Product Research



Woofer: The B 52C component system includes woofers with injection-molded polypropylene cones and durable rubber surrounds. 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.

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

  • Top Mount Depth: 1.931"
  • Bottom Mount Depth: 2.159"


Tweeter: The system uses 1" silk dome tweeters with neodymium motor structure. The tweeters can be flush mounted, surface mounted, or surface mounted at an angle using the included brackets. Once mounted, the tweeters swivel so you can direct them toward the listening positions.

Tweeter Dimensions:

  Frame Width Frame Length Cutout Diameter Mounting Height Mounting Depth
Flush Mount 2.160" 2.160" 1.835" 0.50" 1.0"
Surface Mount 1.845" 1.845" N/A 1.185" 0.4" (Screw Depth)
Angled Surface Mount 1.850" 1.835" N/A 1.355" 0.4" (Screw Depth)


Crossover: Each crossover has screw terminal inputs and separate, attached 38" output leads for the woofer and tweeter. No crossover frequency or slope information was provided by the manufacturer.

Crossover Dimensions:

  • Length: 1.905" (plus wiring)
  • Height: 1.070"
  • Width: 1.385"

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.