---
product_id: 10448808
title: "Selenium RPST400 Replacement Diaphragm for ST400"
brand: "selenium"
price: "A$86"
currency: AUD
in_stock: true
reviews_count: 4
category: "Selenium"
url: https://www.desertcart.com.au/products/10448808-selenium-rpst400-replacement-diaphragm-for-st400
store_origin: AU
region: Australia
---

# Easy Swap Replacement Dynamic Driver Precision Factory-Grade OEM Quality Selenium RPST400 Replacement Diaphragm for ST400

**Brand:** selenium
**Price:** A$86
**Availability:** ✅ In Stock

## Summary

> 🔊 Upgrade your sound, don’t miss the beat!

## Quick Answers

- **What is this?** Selenium RPST400 Replacement Diaphragm for ST400 by selenium
- **How much does it cost?** A$86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/10448808-selenium-rpst400-replacement-diaphragm-for-st400)

## Best For

- selenium enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Installation:** Swap out your old diaphragm in minutes with a hassle-free replacement process.
- • **Seamless OEM Compatibility:** Factory-original diaphragm ensures perfect fit and performance for your ST400 speaker.
- • **Studio-Grade Sound Precision:** Experience crystal-clear audio with the dynamic driver designed for professional-grade monitoring.
- • **Durable Build for Long-Term Use:** Crafted by Selenium, a trusted name in audio components, guaranteeing reliability.
- • **Optimized for Indoor Surround Sound:** Perfectly tuned for immersive 2.0 channel setups in studios, gaming, and home theaters.

## Overview

The Selenium RPST400 Replacement Diaphragm is a factory-original dynamic driver component designed specifically for the ST400 speaker. It offers precise studio-quality sound reproduction, easy installation, and durable performance, making it an essential upgrade for professionals and audiophiles seeking flawless indoor surround sound.

## Description

JBL / Selenium – RPST400 diaphragm for a st400

Review: exelente de muy buena calidad y es identico a la foto
Review: Great product easy change - Easy swap out

## Features

- Selenium diaphragm for a st400
- Comes with factory

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HEFB8AA |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #50,949 in Musical Instruments ( See Top 100 in Musical Instruments ) #236 in Monitor, Speaker & Subwoofer Parts #15,857 in Music Recording Equipment |
| Compatible Devices | Desktop, Laptop, MP3 Player |
| Control Method | Touch |
| Customer Package Type | Well-Protected Package |
| Customer Reviews | 4.1 4.1 out of 5 stars (11) |
| Date First Available | July 29, 2011 |
| Included Components | Speaker cable, User manual |
| Indoor/Outdoor Usage | Indoor |
| Is Waterproof | False |
| Item Weight | 0.8 ounces |
| Item model number | RPST400 |
| Manufacturer | SELENIUM |
| Number of Items | 1 |
| Package Dimensions | 4.53 x 4.21 x 1.65 inches |
| Power Source | Corded Electric |
| Recommended Uses For Product | For Surround Sound Systems, For Gaming Consoles, For Televisions |
| Series Number | 400 |
| Shape | circular |
| Specific Uses For Product | Studio Monitoring |
| Surround Sound Channel Configuration | 2.0 |
| Warranty Type | Limited |
| Water Resistance Level | Not Water Resistant |
| Wireless Communication Technology | No Wireless Communication Technology |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** Selenium
- **Connectivity Technology:** RCA
- **Mounting Type:** Flush Mount
- **Speaker Type:** Monitor

## Images

![Selenium RPST400 Replacement Diaphragm for ST400 - Image 1](https://m.media-amazon.com/images/I/71+18g9QvlL.jpg)
![Selenium RPST400 Replacement Diaphragm for ST400 - Image 2](https://m.media-amazon.com/images/I/81wTtNxi22L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***O on January 7, 2025*

exelente de muy buena calidad y es identico a la foto

### ⭐⭐⭐⭐⭐ Great product easy change
*by L***R on December 14, 2018*

Easy swap out

### ⭐⭐⭐⭐⭐ Five Stars
*by W***E on April 23, 2016*

Very good

## Frequently Bought Together

- Selenium RPST400 Replacement Diaphragm for ST400
- Install Link 14 Gauge Speaker Wire (Speaker Cable) for Car, Home or RV Audio Cable, 100ft, CCA

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**Shop now:** [https://www.desertcart.com.au/products/10448808-selenium-rpst400-replacement-diaphragm-for-st400](https://www.desertcart.com.au/products/10448808-selenium-rpst400-replacement-diaphragm-for-st400)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-21*