---
product_id: 1158528
title: "Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver)"
brand: "polk audio"
price: "174.06 DT"
currency: TND
in_stock: false
url: https://www.desertcart.tn/products/1158528-polk-audio-db521-5-25-inch-coaxial-speakers-pair-silver
store_origin: TN
region: Tunisia
---

# Marine certified durability 19mm liquid cooled silk/polymer tweeter 275W peak power Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver)

**Brand:** polk audio
**Price:** 174.06 DT
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Elevate your soundscape—wherever the road or waves take you!

## Quick Answers

- **What is this?** Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver) by polk audio
- **How much does it cost?** 174.06 DT with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1158528-polk-audio-db521-5-25-inch-coaxial-speakers-pair-silver)

## 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

- • **Crystal Clear Highs:** 19mm liquid cooled silk/polymer dome tweeter ensures pristine, detailed highs for audiophile-grade clarity.
- • **Dynamic Balance Cone:** Polymer/mica composite woofer offers big sound with minimal distortion, even at high volumes.
- • **Powerful Peak Output:** Feel every beat with 275 watts peak power per pair, delivering immersive sound that commands attention.
- • **Easy Drop-In Installation:** Shallow depth and multi-hole mounting pattern make upgrading your ride’s audio effortless and sleek.
- • **Marine Certified Durability:** Built to brave sun, salt, and spray—perfect for boats and adventurous road trips alike.

## Overview

The Polk Audio DB521 5.25-inch coaxial speakers deliver a powerful 275W peak output with marine-certified durability, making them ideal for both vehicles and boats. Featuring a dynamic balance polymer/mica composite woofer and a 19mm liquid cooled silk/polymer dome tweeter, these speakers provide clear highs and rich bass with minimal distortion. Designed for easy drop-in installation, they combine cutting-edge materials and engineering to enhance your audio experience in any environment.

## Description

Step up your vehicles audio performance with Polk Audio's revolutionary db521's. Cutting edge technology has allowed for an efficient speaker that has ability to accurately reproduce music like you have never heard before. A precise balance of materials including the Silk/Polymer Dome tweeter and Mica Cone woofer enable smooth roll off and quick response at any volume. The rubber surround adds to bass response as well as increases the lifetime of the speaker under any conditions. Being marine certified, the Polk DB521's will surprise you with its versatility and ability for use in many applications. The high efficiency loudspeaker means less power is necessary for the same quality output. The revamped db Series delivers that perfect Polk Audio performance and durability like never before.

## Features

- 5 1/4 inches 2 way Speakers (Marine Certified)
- Power Handling: Peak: 275 watts per pair / 135 watts each & RMS: 90 watts per pair / 45 watts each
- Dynamic Balance polymer/mica composite mineral filled cone is stiff yet lightweight for big sound and little distortion
- 19mm liquid cooled silk/polymer composite dome tweeter with neodymium magnet for clear and detailed highs
- Multi hole mounting pattern and shallow depth for easy drop in installations in most cars
- Pair of marine certified speakers perfect for use in boats of all types
- Equipped with a 0.75 inch liquid cooled silk polymer composite dome tweeter
- Maximum input power: 135 watts
- Equipped with a dynamic balance polymer/mica composite mineral filled cone for a big sound
- Durable butyl rubber surround stands up to the stress of extreme temperatures, sunlight and time

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000P0PF8C |
| Additional Features | Water-resistant, Durable |
| Antenna Location | All |
| Audio Driver Size | 5.25 Inches |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Best Sellers Rank | #105,239 in Electronics ( See Top 100 in Electronics ) #1,223 in Car Coaxial Speakers |
| Brand | Polk Audio |
| Built-In Media | 2 x Speaker |
| Color | SILVER |
| Compatible Devices | Desktop, Gaming Console, Karaoke Machine, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Compatible with Vehicle Type | Boat |
| Connectivity Protocol | Coaxial |
| Connectivity Technology | Coaxial |
| Control Method | Voice |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 4.5 out of 5 stars (791) |
| Enclosure Material | Composite |
| Global Trade Identification Number | 00747192112769 |
| Impedance | 4 Ohms |
| Is Waterproof | FALSE |
| Item Dimensions D x W x H | 8"D x 14.5"W x 4.75"H |
| Item Weight | 500 Grams |
| MP3 player | No |
| Manufacturer | Polk Audio |
| Model Name | AA1521-A |
| Model Number | AA1521-A |
| Mounting Type | drop-in" or "car mount |
| Number Of Circuits | 2 |
| Number of Audio Channels | 2.0 |
| Number of Batteries | 1 12V batteries required. |
| Number of Items | 2 |
| Power Source | Corded Electric |
| Series Number | 1521 |
| Speaker Maximum Output Power | 275 Watts |
| Speaker Size | 5.25 Inches |
| Speaker Type | Coaxial |
| Specific Uses For Product | Vehicle, Boat |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 5.25 Inches |
| Total Ethernet Ports | 2 |
| Tweeter Diameter | 0.75 Inches |
| UPC | 732233429210 698895342697 747192112769 |
| Unit Count | 2.0 Count |
| Warranty Description | 1 year |
| Warranty Type | Limited |
| Water Resistance Level | Water Resistant |
| Wireless Technology | Coaxial |
| Woofer Diameter | 5.25 Inches |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Polk Audio
- **Connectivity Technology:** Coaxial
- **Mounting Type:** drop-in" or "car mount
- **Speaker Maximum Output Power:** 275 Watts

## Images

![Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver) - Image 1](https://m.media-amazon.com/images/I/610H6nP2DqL.jpg)

## Questions & Answers

**Q: What is the shipping weight / dimensions?**
A: Approximately 1 to 1 1/12 lbs, 13"x7"x7".great sound for the size,great marine application

**Q: whats the cut out size of mounting hole**
A: It calls for 4 and 11/16" but I used a 4.5" hole saw and it fit perfect..

**Q: What is the thickness of the speaker**
A: 2 5/16"

**Q: Can this pair fit a door on a Nissan, that requires 6.5 sized speakers ?  If yes, how so ? Thanks**
A: You can try to find conversion plates since they are a smaller speaker for the 6.5 inch speaker hole for the Nissan. However, I would recommend that you just go with a pair of 6.5 speakers since they are what would fit without modification, plus the speaker size between the 6.5 to the 5.25 will be better. Better quality, Deeper midbass, etc.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.tn/products/1158528-polk-audio-db521-5-25-inch-coaxial-speakers-pair-silver](https://www.desertcart.tn/products/1158528-polk-audio-db521-5-25-inch-coaxial-speakers-pair-silver)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-10*