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JBL Concert Series 6421F

4"x6" 2-way car speakers

Item # 109CT6421

Bring on the big fun of being there live, but leave off the big price tag — that's the idea behind JBL's...

Find what Fits your car

Bring on the big fun of being there live, but leave off the big price tag — that's the idea behind JBL's...

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Item # 109CT6421

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In stock
$79.99 pair

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About the JBL Concert Series 6421F

Strong sound at a strong price

Bring on the big fun of being there live, but leave off the big price tag — that's the idea behind JBL's Concert Series car speakers. Their Concert 6421F 4"x6" coaxial speakers deliver a strong sound with a striking design, accented by JBL's "exclamation point" logo on the tweeter. And the speaker's patented Plus One™ structure extends the surface area of the polypropylene woofer cone to give you a better low-frequency experience. 

Strong sound at a strong price

Bring on the big fun of being there live, but leave off the big price tag — that's the idea behind JBL's Concert Series car speakers. Their Concert 6421F 4"x6" coaxial speakers deliver a strong sound with a striking design, accented by JBL's "exclamation point" logo on the tweeter. And the speaker's patented Plus One™ structure extends the surface area of the polypropylene woofer cone to give you a better low-frequency experience. 

A match for any system

These 3-ohm speakers are sensitive enough that you can power them with an aftermarket stereo, but you'll get even better results feeding them power from an outboard amp.

Grilles are not included; the factory grilles should be suitable for most applications.

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Product highlights:

  • 4"x6" 2-way speakers (pair)
  • polypropylene Plus One™ woofer cone with rubber surround
  • dome tweeter
  • handles up to 35 watts RMS (105 watts peak power)
  • frequency response: 75-20,000 Hz
  • impedance: 3 ohms
  • sensitivity: 91 dB at 2.83V
  • top-mount depth: 1-3/4"
  • grilles not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # SPKCON6421FAM

What's in the box:

  • Two 2-Way speakers
  • Installation instructions
  • Template on box

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More details on the JBL Concert Series 6421F

Pat M.

Features & specs

General
Speaker Size 4X6
Design 2-way
Tweeter Design Dome
Impedance (Ohms) 3
Tweeter Composition ---
Woofer Composition Polypropylene
Woofer Surround Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 91
Frequency Response 75 - 20k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 35
Peak Power Handling (Watts) 105
Top-mount Depth (Inches) 1 3/4
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 0

Product Research

Features

Plus One+ Woofer Cones: Each speaker uses a cone larger than other speakers of the same size. This is accomplished by using a unique basket design and hi-roll surround. The Plus One+ design offers greater bass output and an increase in efficiency.

High-Output Design: The 3Ω voice coil design compensates for the high in-line resistance of small gauge factory wiring, extracting more power from factory (or aftermarket) receivers. This results in clearer, richer sound for the listener.

Size Classification Note: The CT6421 comes mounted on a standard 4x6 bracket (the most common 4x6 application). While the brackets appear to be easily removable, they are glued in place at four points around the perimeter (in addition to the four screws, which are obvious). With the brackets in place, the speakers fit many top mount standard 4x6 and metric 4x6 applications. If the adapters are removed, the speakers will fit additional top mount metric 4x6 applications, as well as some bottom mount metric 4x6 applications.

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Customer Q&A

1 question already asked

Q
Why does it say it wouldnt fit in my s10, but it looks like it clearly would?
[ Tbone  Sep 01, 2019 ]
1 answer
A
Thomas, depending on the year, and specifications of your vehicle. There could be several factors that keep it from fitting. Mounting height, mounting depth, max/min apex, magnet diameter, etc. You should get in touch with one of our advisors for more personalized help! https://www.crutchfield.com/support/ContactUs.aspx
[ Calvin  Sep 25, 2019 ]  Staff

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