---
product_id: 2391526
title: "BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually"
brand: "boss audio systems"
price: "$63"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/2391526-boss-audio-systems-brs40-4-inch-replacement-car-door-speaker
store_origin: NZ
region: New Zealand
---

# 4 Ohm Impedance 100Hz-18kHz Range 50W Power BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually

**Brand:** boss audio systems
**Price:** $63
**Availability:** ✅ In Stock

## Summary

> 🎉 Elevate Your Drive with BOSS Audio!

## Quick Answers

- **What is this?** BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually by boss audio systems
- **How much does it cost?** $63 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/2391526-boss-audio-systems-brs40-4-inch-replacement-car-door-speaker)

## 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

- • **🔧 Built to Last:** Crafted with durable polypropylene and aluminum for long-lasting performance.
- • **📏 Compact Design:** Space-saving dimensions (4.1” x 4.1” x 1.8”) for easy installation.
- • **🛡️ Peace of Mind:** Enjoy a 3-year Platinum Online Dealer Warranty for worry-free listening.
- • **🎶 Unleash Your Sound:** Transform your car audio experience with 50 watts of dynamic power!
- • **🚗 Universal Compatibility:** Perfectly fits a variety of vehicles - from cars to trucks and beyond!

## Overview

The BOSS Audio Systems BRS40 is a high-performance 4-inch full-range replacement car speaker, delivering 50 watts of power with a frequency response of 100 Hz to 18 kHz. Designed for durability and compatibility, it features a polypropylene cone and aluminum voice coil, making it an ideal choice for enhancing your vehicle's audio system. With a compact design and a 3-year warranty, this speaker is perfect for music lovers on the go.

## Description

BOSS Audio Systems BRS40 50 Watt, 4 Inch , Full Range, Replacement Car Speaker - Sold Individually

## 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 |
|---------------|-------|
| Number of Batteries | 1 12V batteries required. |
| Is Electric | Yes |
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 50 Watts |
| Subwoofer Connectivity Technology | Wired |
| Connectivity Technology | Coaxial |
| Audio Driver Type | Dynamic Driver |
| Item Weight | 0.87 Pounds |
| Item Dimensions D x W x H | 4.06"D x 1.8"W x 4.06"H |
| Unit Count | 1.0 Count |
| Impedance | 4 Ohm |
| Number of Audio Channels | 4.1 |
| Compatible with Vehicle Type | Bus, Van, RV, Car, Truck, Tractor |
| Compatible Devices | Laptop, Personal Computer, Smartphone |
| Speaker Size | 4 Inches |
| Tweeter Diameter | 4.01 Inches |
| Water Resistance Level | Not Water Resistant |
| MP3 player | No |
| Specific Uses For Product | car audio systems replacement |
| Color | black |
| Is Waterproof | False |
| Warranty Type | Extended |
| Maximum Range | 25 Meters |
| Control Method | Touch |
| Audio Output Mode | Surround |
| Mounting Type | Flush Mount |
| Material Type | Polypropylene, Aluminum |
| Speaker Type | Coaxial |
| Additional Features | Hi Res Audio |
| Recommended Uses For Product | For Music Players |
| Subwoofer Diameter | 4 Inches |

## Product Details

- **Brand:** BOSS Audio Systems
- **Speaker Maximum Output Power:** 50 Watts
- **Frequency Response:** 100 Hz
- **Connectivity Technology:** Coaxial
- **Audio Output Mode:** Surround

## Images

![BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually - Image 1](https://m.media-amazon.com/images/I/61mFc9jCqTL.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

### ⭐⭐⭐⭐⭐ Delivering Powerful and Clean Sound Like a BOSS!
*by L***. on August 30, 2016*

The media could not be loaded. I purchased two BOSS BRS40 4", 4-ohm, 50-watt speakers for a cigar box speaker-amplifier project. I paired these speakers with a class-d amplifier capable of 30-watts peak/15-watts x 2 RMS. To ensure I had some punch in the bass of these full range speakers, I made a small port in my cigar box speaker-amp. I was surprised in the ample bass response coming from these speakers nestled in a 3.75 in. deep cigar box. The speakers arrived on time and in good condition. I would definitely recommend these speakers to family, friends, coworkers, and acquaintances. I think the price was good and the speaker performance is even better. I am going to purchase these again for similar size cigar box projects. Matter of fact I have two very nice Drew Estates Tabak Especial (Coffee Infused) cigar boxes sitting in my office that will be well suited for this speaker. Unfortunately, I have six other cigar box amps in line before them.

### ⭐⭐⭐⭐⭐ Replacement speakers
*by D***  on March 23, 2025*

Very good, clarity

### ⭐⭐⭐⭐ Fits
*by A***1 on April 27, 2025*

Fit in 337 bobcat excavator. Sound is ok. Good for the price

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**Shop now:** [https://www.desertcart.nz/products/2391526-boss-audio-systems-brs40-4-inch-replacement-car-door-speaker](https://www.desertcart.nz/products/2391526-boss-audio-systems-brs40-4-inch-replacement-car-door-speaker)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-20*