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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...

Item # 109CT421

Every order includes

  • Free lifetime tech support
  • 60-day price-drop protection
  • 60-day returns

Get questions answered fast & free

Expert help 400+ hours training Virginia-based

About the JBL 421F

Alexander H.

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
  • Item # 109CT421
  • California customers: Please click here for your Proposition 65 WARNING.

What's in the box:

Featured video:

More details on the JBL 421F

Pat M.

Features & specs

General
Speaker Size 4
Driver Design 2-way
Woofer Design Plus One Cone
Woofer Material Polypropylene
Woofer Surround Rubber
Midrange Design ---
Midrange Material ---
Tweeter Design Dome
Tweeter Material PEI
Super Tweeter Design ---
Super Tweeter Material ---
Impedance (Ohms) 3
Weather-resistant No
Grilles Included No
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
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.

The JBL 421F replaces these items:


Adding...
  • 4" injection molded polypropylene and mica-reinforced composite woofer cone with rubber-coated cloth surround
  • 1-3/16" PET balanced dome tweeter
  • handles up to 30 watts RMS (210 watts peak power)

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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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JBL Concert Series 421F
$69.99 pair
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