---
product_id: 119966277
title: "Polk Audio db840 8-Inch Single Voice Coil Subwoofer"
brand: "polk audio"
price: "$206.95"
currency: USD
in_stock: true
reviews_count: 5
category: "Polk Audio"
url: https://www.desertcart.us/products/119966277-polk-audio-db840-8-inch-single-voice-coil-subwoofer
store_origin: US
region: United States of America
---

# 35-500 Hz deep bass range 200W RMS power punch Heavy gauge Alpha steel basket Polk Audio db840 8-Inch Single Voice Coil Subwoofer

**Brand:** polk audio
**Price:** $206.95
**Availability:** ✅ In Stock

## Summary

> 🎵 Feel the bass, own the moment — Polk Audio DB840 delivers power that commands attention!

## Quick Answers

- **What is this?** Polk Audio db840 8-Inch Single Voice Coil Subwoofer by polk audio
- **How much does it cost?** $206.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/119966277-polk-audio-db840-8-inch-single-voice-coil-subwoofer)

## 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

- • **Built to Last:** Engineered with a proprietary heavy gauge stamped steel 'Alpha' basket for unmatched durability and vibration control.
- • **Thermal Toughness:** EPDM surround ensures enhanced control and performance even under extreme temperature conditions.
- • **Seamless Integration:** Compact 8-inch size with 94mm mounting depth fits effortlessly into most vehicle and home audio setups.
- • **Wide Frequency Range:** Experience rich bass from 35 Hz deep lows up to 500 Hz highs, perfect for immersive car or home theater soundscapes.
- • **Precision Bass Mastery:** Deliver crystal-clear, floor-shaking lows with 200 watts RMS and a max of 600 watts power handling.

## Overview

The Polk Audio DB840 is a robust 8-inch single voice coil subwoofer designed for professional-grade audio performance. Rated at 200 watts RMS and 600 watts max, it features a heavy gauge stamped steel 'Alpha' basket and an EPDM surround for durability and thermal stability. With a frequency response spanning 35 to 500 Hz, it produces deep, precise bass ideal for car audio systems and home theaters. Its compact mounting depth of 94mm ensures easy installation, making it a top choice for audiophiles seeking powerful, clean low-end sound.

## Description

Style:8" 600 Watts Product Description 8" HYPER 200 SERIES SUBWOOFER Proprietary Heavy Gauge Stamped Steel "Alpha" Basket Laminated non-pulp paper cone EPDM surround for Enhanced Control at Extreme Temperatures Rated at 200 watts RMS / 600 watts MAX 86 dB @ 1w/1m 38 oz Magnet Frequency Response SE: 35 - 500 Hz Single 4Ω 1½" voice coils 8-gauge nickel plated input terminals Mounting Dimensions - Depth: 94mm / 3.70" [Through Hole: 184mm / 7.24"] Diameter: 220mm / 8.66" From the Manufacturer Alphasonik HSW208 Hyper 200 Series 8"

Review: Alphasonik HSW208 - This review needs to be updated it’s not a Polk DB840 subwoofer anymore reading from old reviews. It’s the Alphasonik HSW208. Let me be the first to update the reviews. Hooked this up to my receiver without a box & already it sounds impressive produces clean accurate bass & sounds like it can get low in the right box. It vibrates my floor already. I am going to use it as a stock woofer replacement in my Acura RL with the Bose system & see how well it does as a trunk mounted woofer. Depending how well it does I may build a box for it if needed. Stay tuned for an update if you are interested in this woofer. It’s well built, pretty heavy, booklet is very informative & professional. Packaging was very nice & came with a free Alphasonik bag inside. This is the first product I have bought from them. Update: Finally got around to installing it in a box that’s smaller then specs but this little 8 sounds clean it can pick up the lows & slams on the highs for an 8. Box I got was smaller & woofer is breaking in sounds better the more I play it. 3 of these paired together In the right box would be a nice sq build that holds its own in the world of 8s
Review: No es marino certificado ni siquiera marino - El producto no es marino, y ponen en la descripción que es marino certificado

## Features

- 8” HYPER 200 SERIES SUBWOOFER
- Rated at 200 watts RMS / 600 watts MAX
- Proprietary Heavy Gauge Stamped Steel “Alpha” Basket
- 86 dB / 38 oz Magnet / Frequency Response: 35 500 Hz
- Mounting Dimensions Depth: 94mm / 3.70”

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0016GX21G |
| Antenna Location | All Types |
| Audio Driver Size | 8 Inches |
| Audio Output Mode | Surround |
| Audio output mode | Surround |
| Battery Average Life | 16 Hours |
| Box Contents | NO |
| Brand | Polk Audio |
| Brand Name | Polk Audio |
| Colour | black |
| Compatible Devices | Laptop, Smartphone, Tablet |
| Connectivity technology | Auxiliary |
| Control Method | Voice |
| Customer Reviews | 4.1 out of 5 stars 121 Reviews |
| Enclosure Material | Steel, Laminated Non-Pressed Pulp Paper |
| Frequency Response | 500 Hz |
| Frequency response | 500 Hz |
| Global Trade Identification Number | 00747192113766 |
| Is Waterproof | true |
| Item Weight | 6.5 Pounds |
| MP3 player | No |
| Manufacturer | Polk Audio |
| Maximum Speaker Output Power (in watts) | 360 Watts |
| Model Name | 1 |
| Model Number | DB840 |
| Mounting Type | Ceiling Mount |
| Mounting type | Ceiling Mount |
| Network Connectivity Technology | Auxiliary |
| Number of Audio Channels | 2.1 |
| Number of Batteries | 1 12V batteries required. |
| Power Source | Corded Electric |
| Product Features | Durable |
| Series Number | 208 |
| Speaker Size | 8 Inches |
| Speaker Type | Subwoofer |
| Speaker maximum output power | 360 Watts |
| Specific Uses For Product | car audio systems, home theaters |
| Subwoofer Speaker Diameter | 8 Inches |
| Tweeter Diameter | 1 Inches |
| UPC | 163120548804 100177374833 747192113766 |
| Unit Count | 1.0 count |
| Wireless Technology Type | No Wireless Communication Technology |

## Product Details

- **Brand:** Polk Audio
- **Speaker Maximum Output Power:** 360 Watts
- **Frequency Response:** 500 Hz
- **Connectivity Technology:** Wired
- **Audio Output Mode:** Surround

## Images

![Polk Audio db840 8-Inch Single Voice Coil Subwoofer - Image 1](https://m.media-amazon.com/images/I/81Umuu1sP0L.jpg)
![Polk Audio db840 8-Inch Single Voice Coil Subwoofer - Image 2](https://m.media-amazon.com/images/I/81zw8iTgwhL.jpg)
![Polk Audio db840 8-Inch Single Voice Coil Subwoofer - Image 3](https://m.media-amazon.com/images/I/81d5NTaVFPL.jpg)
![Polk Audio db840 8-Inch Single Voice Coil Subwoofer - Image 4](https://m.media-amazon.com/images/I/81N06wD4XWL.jpg)
![Polk Audio db840 8-Inch Single Voice Coil Subwoofer - Image 5](https://m.media-amazon.com/images/I/81AP4XfVqnL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Alphasonik HSW208
*by N***. on 8 December 2024*

This review needs to be updated it’s not a Polk DB840 subwoofer anymore reading from old reviews. It’s the Alphasonik HSW208. Let me be the first to update the reviews. Hooked this up to my receiver without a box & already it sounds impressive produces clean accurate bass & sounds like it can get low in the right box. It vibrates my floor already. I am going to use it as a stock woofer replacement in my Acura RL with the Bose system & see how well it does as a trunk mounted woofer. Depending how well it does I may build a box for it if needed. Stay tuned for an update if you are interested in this woofer. It’s well built, pretty heavy, booklet is very informative & professional. Packaging was very nice & came with a free Alphasonik bag inside. This is the first product I have bought from them. Update: Finally got around to installing it in a box that’s smaller then specs but this little 8 sounds clean it can pick up the lows & slams on the highs for an 8. Box I got was smaller & woofer is breaking in sounds better the more I play it. 3 of these paired together In the right box would be a nice sq build that holds its own in the world of 8s

### ⭐ No es marino certificado ni siquiera marino
*by R***. on 28 April 2026*

El producto no es marino, y ponen en la descripción que es marino certificado

### ⭐⭐⭐⭐⭐ Installed fine as replacement to Mitsu Montero stock SUB
*by B***S on 26 April 2012*

So, I blew out my Mitsubishi Montero's(With Infinity Sound) stock sub-woofer and because I could neither find what the model of the previous stock sub was, or locate any subs made for the system I decided to take a gamble on this subwoofer. After tearing apart the car to get the the subwoofer we just wired this sub directly where the old one was, same Infinity amp and all. Not that anyone else has a Mitsubishi Montero, but if you do. and you have the Infinity Sound system, this sub will work as a replacement sub. It's only 4 inches deep which is short enough to fit in the hole and it is wide enough where all you need to do is drill new holes in the metal to get it fastened in. The sound provided by this amp is superb, I don't really crank up my sound system so I can't tell you what it does at ear splitting decibels, all I can say is that with the system cranked up enough to hear it fully going down the road at 55 mph with the windows open, this sub packs a distinct punch. I'm sure you could get a lot more out of it if you saddled it with a higher power amp, not what I was looking for though. The sound quality from this sub is something you won't find in the cheaper offerings out there, it's a very clean. No rattle bass, what you'd expect from an 8 inch sub. It's really too bad that I've got a grate over my sub because this baby actually looks pretty cool. It's just classy. Hope it helps!

## Frequently Bought Together

- Alphasonik HSW208 Hyper 200 Series 8” 600 Watts Max / 200 Watts RMS Single 4 Ohm Car Subwoofer Stamped Alpha Steel Basket with High Grade Magnet Non Pressed Paper Cone Audio Speaker Bass Sub Woofer
- BOSS Audio Systems KIT2 8 Gauge Complete Car Amplifier Installation Wiring Kit with Power Cables, Ground Cables, Turn-On Wire, Speaker Wire, Terminals
- Kicker 46KISLOC2 K-Series Stereo Line-Output Converter w/Remote Turn-On Output

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-22*