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Polk Audio DB 402 DB+ Series 4" 2-way car speakers

Item # 107DB402

If you're building your new system on a budget, Polk Audio's DB+ Series speakers are a dynamite value as well as...

Find what Fits your vehicle

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If you're building your new system on a budget, Polk Audio's DB+ Series speakers are a dynamite value as well as...

Item # 107DB402

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  • 60-day price-drop protection
  • 60-day returns

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About the Polk Audio DB 402

Alexander H.

Product highlights:

  • 2-way car speakers (pair)
  • 4" polypropylene woofer cone with rubber surround
  • 3/4" silk dome tweeter
  • handles up to 45 watts RMS (135 watts peak power)
  • frequency range: 60-22,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 1-13/16"
  • grilles included
  • warranty: 1 year
  • MFR # DB402
  • Item # 107DB402

What's in the box:

Polk Audio DB 402 owner's manual

If you need assistance accessing this owner's manual, please give us a call.
  • Two 2-way speakers
  • 2 Grilles
  • Two 12" Lengths of speaker wire (tinned wire on one end and female quick slides on the other)
  • 4 Red plastic butt connectors
  • Eight 1" Stainless steel screws
  • 8 Stainless steel speed clips
  • Owner's manual
  • Online registration information

Featured video:

More details on the Polk Audio DB 402

Pat M.

Features & specs

General
Speaker Size 4
Driver Design 2-way
Woofer Design Cone
Woofer Material Polypropylene
Woofer Surround Rubber
Midrange Design ---
Midrange Material ---
Tweeter Design 3/4" Dome
Tweeter Material Silk
Super Tweeter Design ---
Super Tweeter Material ---
Impedance (Ohms) 4
Weather-resistant No
Grilles Included Black plastic
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) 90
Sensitivity at 2.83 volts N/A
Frequency Response 60 - 22k Hz
Maximum RMS Wattage 45
Peak Power Handling (Watts) 135
Top-mount Depth (Inches) 1 7/8
Bottom-mount Depth (Inches) 2 1/16
Cutout Diameter or Length (inches) 3 1/2
Mounting Height (Inches) 0.312
Frame Width 3.924
Frame Length 3.924
The Polk Audio DB 402 replaces these items:

Product Research

Features

Dynamic Balance: Dynamic Balance is a proprietary Polk Audio technology using laser imaging to determine what combination of speaker materials create the least amount of resonance. Eliminating resonance in speakers results in a wide, smooth response and low distortion.

4/2 Hole Compatibility: Most 4" factory speakers use four mounting screws, however, in some vehicles, only two are used. The DB402's mounting tabs can be removed, allowing installation in 4-hole or 2-hole applications. Please enter your vehicle information to confirm fit.

Marine Certification: Polk speakers are marine certified, making them a good choice for boats in fresh water, convertibles, motorcycles, ATVs, and other applications where the speaker might get wet. Because they have coated steel baskets and the terminals and crossover components are not covered, we do not recommend using them in salt water environments.

The Polk Audio DB 402 replaces these items:


Adding...
  • polymer/mica composite woofer with butyl rubber surround
  • 3/4" liquid-cooled silk/polymer composite dome tweeter
  • frequency response: 85-22
  • 000 Hz

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Customer Q&A

6 questions already asked

Q
Would these be ok with a 100 watt rms amp? It's a MA Audio M489i
frederick  Nov 23, 2024
1 answer
A
Greetings Frederick. Thank you for your question. The Polk Audio DB402's are rated for only 45 watts RMS. I would not recommend putting a 100 watts of RMS power on them.
thomas  Nov 24, 2024 (Staff)
Q
How do these sound compared to the kicker PS44s that are meant for a motorcycle as well? The Polk DB 402s that I have have a lot of distortion at high volume. Would audio frog speakers be a lot better than these two choices?
gl1200  Jun 06, 2022
1 answer
A
Greetings, and thank you for your questions. Audio Frog speakers are well made, great sounding speakers. Not meant for an outdoor environment. Smaller speakers distort when the amplification is not very good, or they are sent a lot of low frequencies they are not designed to play. Most 4 inch speakers would benefit from having additional bass blockers. That would reduce the risk of distorting.
thomas  Jun 06, 2022 (Staff)
Q
Will these fit into a toyotal 4runner dash speaker box?
daryl  Jan 22, 2022
1 answer
A
You can check to see if this will fit your vehicle by using our Outfit My Car tool: http://www.crutchfield.com/car/carselector.aspx For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
kenneth  Jan 24, 2022 (Staff)
Q
What size amp should I use to power 4 of these speakers?
christopher  May 03, 2021
1 answer
A
These are 4" speakers and rated to handle 45 watts continuous power but not sure that is really necessary. These are not subwoofers that would use an amp for in car installation. I have these installed into a dashboard and I am driving with a Clarion in-dash unit. They seem efficient and sound good.
vincent  May 03, 2021
Q
Are they waterproof? Replacing them on a motorcycle, will they stand being outside in the weather?
doliver  Aug 02, 2020
1 answer
A
I've had them in my jeep without doors, windows and sometimes no roof. Still working well
george  Aug 02, 2020
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