---
product_id: 259531265
title: "Boss Audio Systems Brs40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually"
brand: "boss audio systems"
price: "350 kr"
currency: NOK
in_stock: true
reviews_count: 5
category: "Boss Audio Systems"
url: https://www.desertcart.no/products/259531265-boss-audio-systems-brs40-50-watt-4-inch-full-range
store_origin: NO
region: Norway
---

# 4 Ohms impedance for crisp clarity 100 Hz - 18 kHz frequency range 50W max output power Boss Audio Systems Brs40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually

**Brand:** boss audio systems
**Price:** 350 kr
**Availability:** ✅ In Stock

## Summary

> 🎵 Upgrade your ride’s soundtrack with Boss-level clarity!

## Quick Answers

- **What is this?** Boss Audio Systems Brs40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually by boss audio systems
- **How much does it cost?** 350 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/259531265-boss-audio-systems-brs40-50-watt-4-inch-full-range)

## Best For

- boss audio systems enthusiasts

## Why This Product

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

## Key Features

- • **Easy Upgrade:** Compact 4-inch size with flush mount compatibility makes replacement a breeze.
- • **Durable Design:** Polypropylene cone and foam surround built to withstand the rigors of the road.
- • **Wide Frequency Range:** From deep bass to sparkling highs, experience full-range sound from 100 Hz to 18 kHz.
- • **Precision Audio Clarity:** 4 Ohm impedance ensures your playlists hit every note with crystal-clear accuracy.
- • **Power-Packed Performance:** 50 watts deliver booming sound that commands attention on every drive.

## Overview

The Boss Audio Systems BRS40 is a 4-inch full-range replacement car speaker delivering 50 watts of power with a 4 Ohm impedance and a frequency response spanning 100 Hz to 18 kHz. Featuring a durable polypropylene cone and foam surround, it offers reliable, crisp sound quality in a compact, flush-mount design. Perfect for upgrading your vehicle’s audio system with a trusted 3-year warranty.

## Description

4-Inch Dual Cone Replacement Speaker, Individually Packaged In Clamshell

Review: 音は良かった - 車に備え付けのダッシュボードスピーカーの音ががっかりだったので 同サイズのこのスピーカーが意外に格安だったので購入 低音は満足のいく音でした。高音もう少し出てくれると更に良かったのですが 良く見なかった自分が悪かったのですがペア（２個）価格かと思って購入したら １個でした。（慌てて追加購入しました(^_^;)）
Review: Good boom for the price - For the price, which is simply incredible, these are 5-star speakers. I picked up 2 for a home stereo project (bookshelf mini-speakers). They arrived incredibly fast and were clam-shelled for extra protection. See picture below for contents. Speaker is 4" square. The leads are marked, but it is really faint; I used a flashlight to read the polarities. Speakers were tested on a Pioneer amp. At 25 watts (4 Ohm impedance) they were clear, loud, and without distortion. The bass registers but is nothing to write home about. The woofer does pick-up beautiful midranges clearly and with an audiophile level not expected for the price. It is a dual cone, so the tweeter is is a whizzer that really can't pick up the high range treble and is mediocre, but passable. The next test was at 50W - likely overdriven somewhat (~55W). Sound output was very good; loud, mostly clear and unexpectedly crisp on midrange (with limited bass) - it played a house mix with boom. Again, the treble suffered; it started to distort on treble laden rock songs (despite the amp actively filtering the signal). Despite this distortion, the speakers are surprisingly good, better than expected, and at that price... need I say more?

## Features

- Impedance: 4 Ohms, Frequency Response: 100 Hz - 18 kHz, Sensitivity: 82 dB
- Cone: Polypropylene, Voice Coil: 1 Inch Aluminum
- Surround: Foam, Basket: Stamped
- Dimensions: Depth 4.1” x Width 4.1” x Height 1.8”, Weight Per Pair: 1 Lbs.
- 3 Year Platinum Online Dealer Warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001RNNX8K |
| Additional Features | Radio |
| Age Range Description | Adult |
| Antenna Location | for surround sound systems |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Audio output mode | Surround |
| Battery Average Life | 5 Hours |
| Best Sellers Rank | #28,450 in Electronics ( See Top 100 in Electronics ) #67 in Coaxial Car Speakers |
| Brand | BOSS Audio Systems |
| Built-In Media | Brs Series Dual-cone Full-range Replacement Speaker (4") |
| Color | black |
| Compatible Devices | Desktop, Laptop, MP3 Player, Smartphone, Tablet |
| Compatible with Vehicle Type | Bus, Car, RV, Tractor, Truck, Van |
| Connectivity Protocol | Coaxial |
| Connectivity Technology | Coaxial |
| Connectivity technology | Coaxial |
| Control Method | Touch |
| Controller Type | Button Control or Touch Control |
| Country of Origin | China |
| Customer Package Type | standard packaging |
| Customer Reviews | 4.4 out of 5 stars 1,045 Reviews |
| Enclosure Material | Polypropylene, Aluminum |
| Frequency Response | 18 KHz |
| Frequency response | 18 KHz |
| Global Trade Identification Number | 00791489110341, 00999994548769 |
| Impedance | 4 Ohms |
| Is Waterproof | False |
| Item Dimensions D x W x H | 10.3D x 10.3W x 4.6H centimeters |
| Item Weight | 0.87 Pounds |
| MP3 player | No |
| Manufacturer | BOSS AUDIO |
| Maximum Range | 25 Meters |
| Model Name | Brs40 |
| Model Number | BRS40 |
| Mounting Type | Flush Mount |
| Mounting type | Flush Mount |
| Number of Audio Channels | 5.1 |
| Number of Batteries | 1 12V batteries required. |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 50 Watts |
| Speaker Size | 4 Inches |
| Speaker Type | Component |
| Speaker maximum output power | 50 Watts |
| Specific Uses For Product | car audio systems replacement |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 4 Inches |
| Tweeter Diameter | 4.01 Inches |
| UPC | 523161112950 999994548769 999994339039 617407313352 809186297385 328996141256 070071263581 809385692271 072090792981 100010956615 014445412151 791489110341 |
| Unit Count | 1 Count |
| Warranty Type | Full |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology | No Wireless Communication Technology |
| Woofer Diameter | 4 Inches |

## Product Details

- **Audio output mode:** Surround
- **Brand:** BOSS Audio Systems
- **Connectivity technology:** Coaxial
- **Frequency response:** 18 KHz
- **Speaker maximum output power:** 50 Watts

## Images

![Boss Audio Systems Brs40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually - Image 1](https://m.media-amazon.com/images/I/71Qu5c+NIEL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the ohm rating on these speakers?**
A: 4 ohm's

**Q: Does this fit 2011 Ram 1500 dash speaker?**
A: The only sure way to tell is to take out the old speaker and measure it. If yours is not the size of the BRS35, there are other sizes available.

**Q: is it important to use the plastic mounting ring?**
A: Not if the speaker fits without them.  I installed them in the front doors in my old Escort without them and they work fine.

**Q: Is it a pair of speakers or just one speaker?**
A: Just one at a time. So you really have to order 2 of them if you need a pair.

Sold at unit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 音は良かった
*by L***C on 29 January 2024*

車に備え付けのダッシュボードスピーカーの音ががっかりだったので 同サイズのこのスピーカーが意外に格安だったので購入 低音は満足のいく音でした。高音もう少し出てくれると更に良かったのですが 良く見なかった自分が悪かったのですがペア（２個）価格かと思って購入したら １個でした。（慌てて追加購入しました(^_^;)）

### ⭐⭐⭐⭐⭐ Good boom for the price
*by K***N on 3 October 2016*

For the price, which is simply incredible, these are 5-star speakers. I picked up 2 for a home stereo project (bookshelf mini-speakers). They arrived incredibly fast and were clam-shelled for extra protection. See picture below for contents. Speaker is 4" square. The leads are marked, but it is really faint; I used a flashlight to read the polarities. Speakers were tested on a Pioneer amp. At 25 watts (4 Ohm impedance) they were clear, loud, and without distortion. The bass registers but is nothing to write home about. The woofer does pick-up beautiful midranges clearly and with an audiophile level not expected for the price. It is a dual cone, so the tweeter is is a whizzer that really can't pick up the high range treble and is mediocre, but passable. The next test was at 50W - likely overdriven somewhat (~55W). Sound output was very good; loud, mostly clear and unexpectedly crisp on midrange (with limited bass) - it played a house mix with boom. Again, the treble suffered; it started to distort on treble laden rock songs (despite the amp actively filtering the signal). Despite this distortion, the speakers are surprisingly good, better than expected, and at that price... need I say more?

### ⭐⭐⭐⭐⭐ Good cheap speaker
*by R***N on 29 June 2026*

Very good base for a cheap speaker very much recommend as good as a good set of speakers

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-28*