---
product_id: 1158528
title: "Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver)"
brand: "polk audio"
price: "R1839"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/1158528-polk-audio-db521-5-25-inch-coaxial-speakers-pair-silver
store_origin: ZA
region: South Africa
---

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

**Brand:** polk audio
**Price:** R1839
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your ride’s vibe with Polk’s marine-grade sonic power!

## Quick Answers

- **What is this?** Polk Audio DB521 5.25-Inch Coaxial Speakers (Pair, Silver) by polk audio
- **How much does it cost?** R1839 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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

- • **Easy Installation:** Shallow depth and multi-hole mounting pattern fit most cars and boats effortlessly.
- • **Dynamic Balance Cone:** Polymer/mica composite cone offers big sound with minimal distortion for a premium listening experience.
- • **Powerful Sound Output:** Delivers up to 275 watts peak power for immersive audio clarity.
- • **Advanced Tweeter Technology:** Liquid cooled silk/polymer dome tweeter ensures crisp, detailed highs at any volume.
- • **Marine Certified Durability:** Built to withstand extreme temperatures and sunlight—perfect for boats and vehicles alike.

## Overview

The Polk Audio DB521 5.25-inch coaxial speakers combine marine-certified durability with high-efficiency 275W peak power output. Featuring a dynamic balance polymer/mica composite woofer and a liquid cooled silk/polymer dome tweeter, these speakers deliver clear, distortion-free sound in any environment. Designed for easy installation in vehicles and boats, the DB521 pair offers a perfect blend of ruggedness and premium audio performance.

## 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 |
|---------------|-------|
| Material | Composite |
| Model Name | AA1521-A |
| Speaker Type | Coaxial |
| Recommended Uses For Product | All |
| Compatible Devices | Desktop, Gaming Console, Karaoke Machine, Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Subwoofer Diameter | 5.25 Inches |
| Surround Sound Channel Configuration | 2.0 |
| Color | SILVER |
| Included Components | 2 x Speaker |
| Product Dimensions | 8"D x 14.5"W x 4.75"H |
| Item Weight | 500 Grams |
| Impedance | 4 Ohms |
| Is Waterproof | FALSE |
| Warranty Type | Limited |
| Control Method | Voice |
| Wireless Communication Technology | Coaxial |
| Speaker Size | 5.25 Inches |
| Power Source | Corded Electric |
| Woofer Diameter | 5.25 Inches |
| Tweeter Diameter | 0.75 Inches |
| Water Resistance Level | Water Resistant |
| Customer Package Type | Standard Packaging |
| Number of Batteries | 1 12V batteries required. |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 5.25 Inches |
| Subwoofer Connectivity Technology | Wired |
| Number Of Circuits | 2 |
| Series Number | 1521 |
| Specific Uses For Product | Vehicle, Boat |
| UPC | 732233429210 698895342697 747192112769 |
| Style | Modern |
| Global Trade Identification Number | 00747192112769 |
| Manufacturer | Polk Audio |
| Shape | rectangular |
| Set Name | Pair |
| Item Weight | 1.1 pounds |
| Item model number | AA1521-A |
| Batteries | 1 12V batteries required. |
| Is Discontinued By Manufacturer | Yes |
| Wireless Remote | No |
| Warranty | 1 year |

## Product Details

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

## 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.

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

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-01*