---
product_id: 29143034
title: "DB402 DB+ Series 4 Inch Speakers Car Audio with Marine Certification, Car Coaxial Speakers, Black"
brand: "polk audio"
price: "€ 269.76"
currency: EUR
in_stock: true
reviews_count: 13
category: "Polk Audio"
url: https://www.desertcart.fi/products/29143034-db402-db-series-4-inch-speakers-car-audio-with-marine
store_origin: FI
region: Finland
---

# IP56 marine waterproof certified Dynamic Balance tech for distortion-free sound 135W peak power DB402 DB+ Series 4 Inch Speakers Car Audio with Marine Certification, Car Coaxial Speakers, Black

**Brand:** polk audio
**Price:** € 269.76
**Availability:** ✅ In Stock

## Summary

> 🌟 Upgrade your ride & ride the waves with Polk’s splash-proof sound!

## Quick Answers

- **What is this?** DB402 DB+ Series 4 Inch Speakers Car Audio with Marine Certification, Car Coaxial Speakers, Black by polk audio
- **How much does it cost?** € 269.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/29143034-db402-db-series-4-inch-speakers-car-audio-with-marine)

## Best For

- polk audio enthusiasts

## Why This Product

- Trusted polk audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Resonance-Free Sound:** Dynamic Balance technology uses laser imaging to minimize distortion and maximize clarity across 60-22kHz.
- • **Effortless Installation:** Includes mounting hardware and stylish grilles for a seamless upgrade that elevates your vehicle’s interior.
- • **Marine-Grade Durability:** IP56 certification ensures splash-proof, UV, salt-fog, and humidity resistance—built to brave any adventure.
- • **Versatile Compatibility:** Designed for both car and marine use with 4/2-hole mounting options, perfect for road trips or water escapades.
- • **Powerful & Precise Audio:** 135W peak power with 45W RMS delivers crisp highs and punchy lows for an immersive soundstage.

## Overview

The Polk Audio DB402 DB+ Series 4-inch coaxial speakers deliver high-quality, distortion-free sound with 135W peak power and Dynamic Balance technology. Marine-certified with IP56 splash-proof rating, these speakers resist salt, UV, and humidity, making them ideal for both car and boat use. Easy to install with included hardware and stylish grilles, they offer a versatile, durable audio upgrade for professionals who demand premium sound on the go.

## Description

The Polk Audio DB402 4" 2-Way model for marine and vehicle use, feature a polypropylene woofer cone and a 3/4" silk dome tweeter with a built-in crossover; delivering smooth, precise sound. Dynamic Balance technology uses laser imaging to reduce resonance, producing a wide response with low distortion. The DB+ Series marine speakers are versatile, offering 4/2-hole compatibility and mounting hardware. The bold grille design adds style to any dashboard, appealing to drivers planning road trips and to the car audio enthusiast. The car and marine coaxial speakers, certified by Polk Audio, undergo rigorous tests for sun, moisture, and extreme temperature shifts; so they perform reliably on your vessel without altering performance. Polk Audio's DB+ Series subwoofers complement the set, delivering smooth, powerful bass, letting you upgrade your car stereo without breaking the bank while enjoying best-in-class sound across vehicles and watercraft alike.

Review: Lexus dash speaker upgrade - Installed in my 2018 Lexus GX460 (non Mark Levinson and using the stock amplifier) in the dash corners and center. The installation was super easy and only required a minimum amount of fussing to get the fit right. I chose these due to the high efficiency rating knowing I’d be using them on the stock amplifier. They actually sound pretty good. Bass response (for a 4 inch speaker) as well as detail and dynamic “punch” have all improved over the stock speakers. For a budget upgrade I’m fairly happy with them.
Review: great little speakers - these work great in an old toyota pickup and the price was right

## Features

- EXCEPTIONAL SPEAKER FOR CAR & MARINE - The Polk DB402 2-Way Coaxial Marine Certified car speakers with 135W peak power, 4-ohm impedance, 4" polypropylene woofer cone, and a strong rubber surround are built to reproduce high-quality music
- ELEVATE YOUR CAR AUDIO SYSTEM - With a built-in crossover, the music speaker directs highs & lows to the respective drivers; it handles up to 45W RMS & boasts 60-22kHz range to reproduce high-quality sound
- RESONANCE-FREE SOUND CREATION - With Dynamic Balance proprietary technology, these marine/boat speakers use laser imaging to identify the best mix of materials and ensures a distortion-free response with wide dispersion
- SPLASH-PROOF SOUND - Polk DB+ series speakers give thunderous sonic output in freshwater boats, motorcycles, and more; they have IP56 marine certification with coated steel baskets. They are even tested for Salt-fog, UV, and Humidity
- EASY TO INSTALL - Polk door speakers include mounting hardware and stylish grilles that enable easy installation and add flair to any vehicle interior; an ideal choice for custom installations

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01EYCTVUE |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #16,889 in Electronics ( See Top 100 in Electronics ) #103 in Car Coaxial Speakers |
| Color | Black |
| Compatible Devices | car |
| Control Method | Touch |
| Customer Package Type | Frustration-Free Packaging |
| Customer Reviews | 4.6 4.6 out of 5 stars (484) |
| Date First Available | April 29, 2016 |
| Department | Coaxial Speakers |
| Global Trade Identification Number | 00747192127244 |
| Included Components | Literature, Speaker |
| Is Discontinued By Manufacturer | No |
| Is Waterproof | True |
| Item Weight | 2.5 pounds |
| Item model number | AA9402 |
| Manufacturer | Polk Audio |
| Material | Steel, Polypropylene |
| Model Name | DB402 |
| Mounting Type | Boat Mount,Coaxial,Top Mount |
| Number Of Circuits | 2 |
| Number of Items | 2 |
| Number of Power Levels | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 11.9"D x 11.8"W x 12"H |
| Recommended Uses For Product | For Marine Vehicles, For Vehicles |
| Series Number | 94 |
| Set Name | DB+ Series |
| Shape | Rectangular |
| Speaker Size | 4 Inches |
| Speaker Type | Coaxial |
| Special Feature | Waterproof |
| Specific Uses For Product | Outdoor/Portable Audio Setups, Marine Applications |
| Style | Marine Certified |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 4 Inches |
| Surround Sound Channel Configuration | 2.0 |
| Tweeter Diameter | 0.75 Inches |
| UPC | 747192127244 |
| Unit Count | 1.0 Count |
| Warranty Type | Limited |
| Wireless Communication Technology | No Wireless Communication Technology |
| Woofer Diameter | 4 Inches |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Polk Audio
- **Connectivity Technology:** Coaxial
- **Frequency Response:** 22 KHz
- **Speaker Maximum Output Power:** 135 Watts

## Images

![DB402 DB+ Series 4 Inch Speakers Car Audio with Marine Certification, Car Coaxial Speakers, Black - Image 1](https://m.media-amazon.com/images/I/61l5dWMHc3L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: will these fit a 2014 dodge ram front dash?**
A: Check your owners manual to see what size speakers are installed originally but they fix my MR2 dash!  Good luck

**Q: what is the outer dimension of the grill?**
A: Check your owners manual or Cruchfield site for fitment

**Q: Will these work for the rear of my 2015 Honda GoldWing?**
A: Use the db522 you might have to modify a little bit but they'll fit in

**Q: What size hole the a drill and how many W will each speaker handle**
A: Thanks for your question. Cutout: 4.09 inches. Rated 45 watts continuous power, 135 watts peak.
World Wide Stereo is 40 years old and a proud authorized Polk Audio dealer.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Lexus dash speaker upgrade
*by M***E on January 15, 2026*

Installed in my 2018 Lexus GX460 (non Mark Levinson and using the stock amplifier) in the dash corners and center. The installation was super easy and only required a minimum amount of fussing to get the fit right. I chose these due to the high efficiency rating knowing I’d be using them on the stock amplifier. They actually sound pretty good. Bass response (for a 4 inch speaker) as well as detail and dynamic “punch” have all improved over the stock speakers. For a budget upgrade I’m fairly happy with them.

### ⭐⭐⭐⭐⭐ great little speakers
*by W***M on December 4, 2025*

these work great in an old toyota pickup and the price was right

### ⭐⭐⭐⭐⭐ The speakers were as described and sound good. Fit perfectly for my goldwing.
*by T***Y on October 16, 2025*

I bought these speakers to install on my goldwing. They sound good and fit into my old speaker housings perfectly. For the money I am happy with the item.

## Frequently Bought Together

- POLK AUDIO DB402 DB+ Series 4" Coaxial Speakers with Marine Certification, Black
- APIELE 16mm Latching Push Button Switch 12V DC On Off Black Shell with LED Angel Eye Head for 0.63" Mounting Hole with Wire Socket Plug Self-Locking (Blue/Black Shell)
- Polk Audio DB652 DB+ Series 6.5" Coaxial Speaker for Car & Marine, 2-Way Boat & Car Audio Speaker, 40-22kHz Frequency Response, Polypropylene Woofer Cone & 3/4" Silk Dome Tweeter, Black

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**Shop now:** [https://www.desertcart.fi/products/29143034-db402-db-series-4-inch-speakers-car-audio-with-marine](https://www.desertcart.fi/products/29143034-db402-db-series-4-inch-speakers-car-audio-with-marine)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-20*