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JBL 421F Concert Series 4" 2-way speakers

Item # 109CT421

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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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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2 questions - 5 answers

Item # 109CT421

Shop all JBL 4" Speakers

About the JBL 421F

Alexander H.

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 421F 4" 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 421F 4" 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" 2-way speakers (pair)
  • polypropylene Plus One™ woofer cone
  • PEI dome tweeter
  • handles up to 30 watts RMS (90 watts peak power)
  • frequency response: 75-20,000 Hz
  • impedance: 3 ohms
  • sensitivity: 90 dB at 2.83V
  • top-mount depth: 1-7/8"
  • grilles not included
  • warranty: 1 year
  • MFR # SPKCON421FAM

What's in the box:

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

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Customer reviews for JBL 421F

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4.5 out of 5 stars
30 reviews

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More details on the JBL 421F

Pat M.

Features & specs

General
Speaker Size 4
Design 2-way
Tweeter Design Dome
Impedance (Ohms) 3
Tweeter Composition PEI
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 90
Frequency Response 75 - 20k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 30
Peak Power Handling (Watts) 90
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 3 5/8
Mounting Height (Inches) 0.247
Frame Width 4.03
Frame Length 4.03
The JBL 421F replaces these items:

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.

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Customer Q&A

2 questions already asked

Q
do they come with brackets?
cristobal  Apr 11, 2020
4 answers
A
Not much.
al  Apr 12, 2020
A
Yes it does. And also include with extensions for wiring
rollien  Apr 12, 2020
A
No, speakers only. They do have mounting tabs on 4 corners.
danny  Apr 12, 2020
A
No but crutchfield usually gives you the option to add them at low cosu
kyle  Apr 11, 2020
Q
Does the speaker come with a grill or faceplate?
w  Dec 17, 2019
1 answer
A
No grill or plate. "Car speaker for factory upgrade without grille" written on the box
al  Dec 17, 2019

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