---
product_id: 218538406
title: "BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually"
brand: "boss audio systems"
price: "287 zł"
currency: PLN
in_stock: true
reviews_count: 6
category: "Boss Audio Systems"
url: https://www.desertcart.pl/products/218538406-boss-audio-systems-brs40-50-watt-4-inch-full-range
store_origin: PL
region: Poland
---

# 4 Ohm impedance for crisp sound 100Hz-18kHz frequency range 50W max power BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually

**Brand:** boss audio systems
**Price:** 287 zł
**Availability:** ✅ In Stock

## Summary

> 🎶 Upgrade your ride’s soundtrack — don’t just drive, arrive in style!

## 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?** 287 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/218538406-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

- • **Wide Frequency Range:** Experience rich lows and sparkling highs from 100Hz to 18kHz.
- • **Powerful 50 Watt Output:** Feel every beat with robust sound that fills your car.
- • **3-Year Platinum Warranty:** Drive worry-free with trusted protection and support.
- • **Precision 4 Ohm Impedance:** Optimized for seamless compatibility and clear audio delivery.
- • **Durable Polypropylene Cone:** Engineered for longevity and consistent sound performance.

## Overview

The BOSS Audio Systems BRS40 is a 4-inch full-range replacement car speaker delivering up to 50 watts of power. With a 4 Ohm impedance and a frequency response spanning 100 Hz to 18 kHz, it ensures clear, dynamic sound. Built with a durable polypropylene cone and foam surround, this speaker is designed for reliable performance and easy flush mounting. Backed by a 3-year platinum warranty, it’s the perfect upgrade for any vehicle audio system seeking crisp, balanced sound.

## Description

BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually

Review: Size - Good quality
Review: 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(^_^;)）

## 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 |
| Age Range Description | Adult |
| Antenna Location | For music players |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Battery Average Life | 5 Hours |
| Best Sellers Rank | 19,954 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 50 in Coaxial Car Speakers |
| Box Contents | Speaker |
| Brand Name | BOSS Audio Systems |
| Colour | Black |
| Compatible Devices | Desktop, Karaoke Machine, Laptop, MP3 Player, Smartphone, Tablet |
| Compatible with Vehicle Type | Bus, Car, RV, Tractor, Truck, Van |
| Connectivity Protocol | USB |
| Control Method | Touch |
| Controller Type | Touch Control |
| Country of Origin | China |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.2 4.2 out of 5 stars (4,784) |
| Enclosure Material | Polypropylene, Aluminum |
| 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 centimetres |
| Item Weight | 395 g |
| MP3 player | No |
| Manufacturer | BOSS Audio Systems |
| Maximum Range | 25 Metres |
| Maximum Speaker Output Power (in watts) | 50 Watts |
| Model Name | BRS40 |
| Model Number | BRS40 |
| Mounting Type | Flush Mount |
| Network Connectivity Technology | Coaxial |
| Number of Audio Channels | 5.1 |
| Number of Batteries | 1 12V batteries required. |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Features | Radio |
| Speaker Size | 4 Inches |
| Speaker Type | Component |
| Specific Uses For Product | car audio systems replacement |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Speaker Diameter | 4 Inches |
| Tweeter Diameter | 4.01 Inches |
| UPC | 523161112950 999994548769 999994339039 617407313352 809186297385 328996141256 070071263581 072090792981 809385692271 100010956615 014445412151 791489110341 |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Technology Type | No Wireless Communication Technology |
| Woofer Driver Diameter | 4 Inches |

## Product Details

- **Audio output mode:** Surround
- **Brand:** BOSS Audio Systems
- **Connectivity technology:** Coaxial
- **Frequency response:** 18 KHz
- **Material:** Polypropylene, Aluminum
- **Model name:** BRS40
- **Mounting type:** Flush Mount
- **Speaker maximum output power:** 50 Watts
- **Speaker type:** Component
- **Special feature:** Radio

## 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)
![BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually - Image 2](https://m.media-amazon.com/images/I/81dc4myOVKL.jpg)
![BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually - Image 3](https://m.media-amazon.com/images/I/711nuqPvviL.jpg)
![BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually - Image 4](https://m.media-amazon.com/images/I/71dgTcxKaXL.jpg)
![BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually - Image 5](https://m.media-amazon.com/images/I/71U+ROx3iqL.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

### ⭐⭐⭐⭐⭐ Size
*by T***. on 15 January 2026*

Good quality

### ⭐⭐⭐⭐⭐ Review
*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(^_^;)）

### ⭐⭐⭐⭐⭐ Review
*by A***. on 20 August 2021*

As a OEM replacement it's very good, and it came with universal bracket. I removed OEM plug female from the original speaker and put it on the new one. Works like a charm

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**Shop now:** [https://www.desertcart.pl/products/218538406-boss-audio-systems-brs40-50-watt-4-inch-full-range](https://www.desertcart.pl/products/218538406-boss-audio-systems-brs40-50-watt-4-inch-full-range)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-04-26*