---
product_id: 2391526
title: "BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually"
brand: "boss audio systems"
price: "€ 56.17"
currency: EUR
in_stock: true
reviews_count: 13
category: "Boss Audio Systems"
url: https://www.desertcart.hr/products/2391526-brs40-4-inch-replacement-car-door-speaker-50-watts-max
store_origin: HR
region: Croatia
---

# 100Hz-18kHz frequency range Compact 4.06-inch size 50W max power punch BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually

**Brand:** boss audio systems
**Price:** € 56.17
**Availability:** ✅ In Stock

## Summary

> 🚗 Upgrade your ride’s soundtrack — sound like a BOSS every mile!

## Quick Answers

- **What is this?** BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually by boss audio systems
- **How much does it cost?** € 56.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/2391526-brs40-4-inch-replacement-car-door-speaker-50-watts-max)

## 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 clear highs from 100Hz to 18kHz.
- • **Powerful 50W Max Output:** Unleash crisp, room-filling sound that dominates your drive.
- • **Precision 4-Inch Design:** Fits seamlessly in most car doors for a sleek, flush mount upgrade.
- • **3-Year Platinum Warranty:** Drive worry-free with industry-leading coverage and professional-grade reliability.
- • **Durable Polypropylene Cone:** Engineered for longevity and consistent sound clarity under any road condition.

## Overview

The BRS40 4 Inch Replacement Car Door Speaker by BOSS Audio Systems delivers a powerful 50-watt max output with a broad 100Hz to 18kHz frequency response. Its compact 4.06-inch size and 4-ohm impedance ensure compatibility with most vehicles, while the polypropylene cone and foam surround provide durability and clear sound. Backed by a 3-year platinum warranty, this speaker is a professional-grade upgrade for any car audio system.

## Description

desertcart.com: BOSS Audio Systems BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in Individually : Electronics

Review: Delivering Powerful and Clean Sound Like a BOSS! - 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.
Review: Great upgrade for A1U cabinets. - I ordered the 4" speaker to upgrade my A1U cabinet. The quality of the speaker is apparent when compared to the stock ones that come in these cabinets. The sound quality is great. More base and overall clearer sound. Just a heads up to those looking to upgrade their cabs. Check your speaker size before ordering. I have 3 cabs From A1U. Final fight, rampage and mortal kombat. Final fight and rampage are 4" speakers. Mortal kombat is a 3" speaker because of the button layout. I tried to turn it sideways to make it work. Its a little to big. It will stick out and you will not be able to put the control panel back in. I think a 3.5" speaker will fit in the Mortal kombat cab by turning it sideways and drilling new holes.

## Features

- Dimensions: 4.06 x 4.06 x 1.80 inches
- Impedance: 4 ohms
- Item Weight: 0.87 Lbs.
- Mounting Depth: 1.75 inches, Mounting Hole: 4.01 inches
- Frequency Response: 100 Hz to 18 KHz
- Sensitivity: 82 dB @ 1 watt/1 meter
- Polypropylene Cone, Foam Surround
- Stamped Basket, 0.77 Inch Voice Coil
- BOSS Audio Systems provides a powerful 3-year platinum online dealer warranty. We strongly encourage professional installation of this product to ensure proper and safe functionality

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001RNNX8K |
| Additional Features | Radio |
| Age Range Description | Adult |
| Antenna Location | car |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Best Sellers Rank | #7,932 in Electronics ( See Top 100 in Electronics ) #36 in Car Coaxial Speakers |
| Brand | BOSS Audio Systems |
| Built-In Media | Speaker |
| Color | black |
| Compatible Devices | Desktop, Karaoke Machine, Laptop, MP3 Player, Smartphone, Tablet |
| Compatible with Vehicle Type | Bus, Car, RV, Tractor, Truck, Van |
| Connectivity Protocol | Coaxial |
| Connectivity Technology | Coaxial |
| Control Method | Touch |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.4 out of 5 stars 1,094 Reviews |
| 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 | 4.06"D x 4.06"W x 1.8"H |
| Item Weight | 0.87 Pounds |
| MP3 player | No |
| Manufacturer | BOSS Audio Systems |
| Maximum Range | 25 Meters |
| Model Name | BRS40 |
| Model Number | BRS40 |
| Mounting Type | Flush Mount |
| Number of Audio Channels | 4.1 |
| 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 | Coaxial |
| 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 072090792981 809385692271 100010956615 014445412151 791489110341 |
| Unit Count | 1.0 Count |
| Warranty Description | 3 YEAR PLATINUM DEALER WARRANTY |
| Warranty Type | Extended |
| Water Resistance Level | Not Water Resistant |
| Woofer Diameter | 4 Inches |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** BOSS Audio Systems
- **Connectivity Technology:** Coaxial
- **Frequency Response:** 18 KHz
- **Speaker Maximum Output Power:** 50 Watts

## Images

![BRS40 4 Inch Replacement Car Door Speaker - 50 Watts Max, Sold in 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

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

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.

### ⭐⭐⭐⭐⭐ Great upgrade for A1U cabinets.
*by G***4 on February 1, 2020*

I ordered the 4" speaker to upgrade my A1U cabinet. The quality of the speaker is apparent when compared to the stock ones that come in these cabinets. The sound quality is great. More base and overall clearer sound. Just a heads up to those looking to upgrade their cabs. Check your speaker size before ordering. I have 3 cabs From A1U. Final fight, rampage and mortal kombat. Final fight and rampage are 4" speakers. Mortal kombat is a 3" speaker because of the button layout. I tried to turn it sideways to make it work. Its a little to big. It will stick out and you will not be able to put the control panel back in. I think a 3.5" speaker will fit in the Mortal kombat cab by turning it sideways and drilling new holes.

### ⭐⭐⭐⭐ Medusa turned joe from family guy into stone
*by A***S on May 28, 2026*

I bought two of them and one came with coil rub the other was fine but i really like the sound quality it's a good product for the price but easy install with the plates that come with it and it seems relatively reliable I can say it was hard to find a clamp for the wires altogether I'd recommend

## Frequently Bought Together

- BOSS Audio Systems BRS40 50 Watt, 4 Inch , Full Range, Replacement Car Speaker - Sold Individually
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**Shop now:** [https://www.desertcart.hr/products/2391526-brs40-4-inch-replacement-car-door-speaker-50-watts-max](https://www.desertcart.hr/products/2391526-brs40-4-inch-replacement-car-door-speaker-50-watts-max)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-23*