---
product_id: 218538406
title: "BOSS Audio Systems BRS40 50 Watt, 4 Inch, Full Range, Replacement Car Speaker - Sold Individually"
brand: "boss audio systems"
price: "฿3808"
currency: THB
in_stock: false
reviews_count: 6
category: "Boss Audio Systems"
url: https://www.desertcart.co.th/products/218538406-boss-audio-systems-brs40-50-watt-4-inch-full-range
store_origin: TH
region: Thailand
---

# 4 Ohm impedance 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:** ฿3808
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Upgrade your ride’s soundtrack with BOSS-level power and precision!

## 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?** ฿3808 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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

- • **Powerful 50W Output:** Experience crisp, clear sound that fills your car with every beat.
- • **Wide Frequency Range:** From deep bass to bright highs, enjoy full-range audio clarity.
- • **Compact 4-Inch Design:** Perfect fit for seamless replacement without compromising style.
- • **3-Year Platinum Warranty:** Confidence and peace of mind with extended protection.
- • **Durable Polypropylene Cone:** Engineered for long-lasting performance and rich sound quality.

## Overview

The BOSS Audio Systems BRS40 is a 4-inch full-range car speaker delivering up to 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, high-quality sound in a compact design. Sold individually and backed by a 3-year platinum warranty, it’s the smart upgrade for drivers seeking enhanced in-car audio performance.

## 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 |
| Best Sellers Rank | 49,968 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 125 in Coaxial Car Speakers |
| Colour | Black |
| Compatible devices | Desktop, Karaoke Machine, Laptop, MP3 Player, Smartphone, Tablet |
| Control method | Touch |
| Guaranteed software updates until | unknown |
| Impedance | 4 Ohms |
| Included components | Speaker |
| Is waterproof | False |
| Item model number | BRS40 |
| Item weight | 0.87 Pounds |
| Manufacturer | BOSS Audio Systems |
| Maximum range | 25 Metres |
| Number of items | 1 |
| Power source | Corded Electric |
| Product dimensions | 10.3D x 10.3W x 4.6H centimetres |
| Recommended uses for product | For music players |
| Speaker size | 4 Inches |
| Subwoofer diameter | 4 Inches |
| Surround-sound channel configuration | 5.1 |
| Unit count | 1.0 Count |
| Warranty type | Limited |
| Wireless communication technology | No Wireless Communication Technology |

## 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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---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-24*