---
product_id: 396716669
title: "ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet"
brand: "selenium"
price: "€ 128.39"
currency: EUR
in_stock: true
category: "Selenium"
url: https://www.desertcart.nl/products/396716669-st400trio-8-ohm-super-frequency-tweeter-with-barium-ferrite-magnet
store_origin: NL
region: Netherlands
---

# 300W max power handling Precise 40°x40° dispersion Aluminum + diamond-machined base ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet

**Brand:** selenium
**Price:** € 128.39
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game with precision and power — don’t just hear it, feel it!

## Quick Answers

- **What is this?** ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet by selenium
- **How much does it cost?** € 128.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/396716669-st400trio-8-ohm-super-frequency-tweeter-with-barium-ferrite-magnet)

## 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

- • **Powerful & Scalable:** Handles up to 300W and can be arrayed for expansive coverage and booming SPL.
- • **Quick-Coupling Connectors:** Effortless installation and seamless integration with your professional audio system.
- • **Natural Phenolic Diaphragm:** Durable and cost-effective, delivering a warm, natural sound that outperforms metallic alternatives.
- • **Crystal-Clear High Frequencies:** Experience pristine sound detail without harshness, perfect for audiophile-grade setups.
- • **Heat-Dissipating Aluminum Build:** Diamond-machined aluminum base ensures superior heat management for long-lasting performance.

## Overview

The Selenium ST400TRIO is a high-performance 8-ohm super tweeter designed for exceptional clarity and detail in high-frequency audio reproduction. Featuring a durable phenolic diaphragm, diamond-machined aluminum base for heat dissipation, and a bullet-shaped horn for 40°x40° sound dispersion, it supports up to 300 watts of power and quick-coupling connectors for easy setup. Ideal for both individual use in low-power systems and scalable arrays in professional environments.

## Description

Super tweeter for outstanding detail & clarity in high-frequencies without harshness. The St400 TRIO may be used individually in lower power systems or arrayed for increased coverage & SPL in higher power systems. The base & diffuser are constructed of aluminum contributes to better heat dissipation of the coil moves, w/finish machining of diamond (diamond tool) & varnished. The bullet-shape horn design offers a longer throw 40 Degrees x 40 Degrees dispersion. The phenolic annular diaphragm is long-lasting, cost-effective & more natural-sounding than metallic diaphragms. The use of high-temperature materials & adhesives improves power handling & produces exceptionally high acoustic output. Together w/magnetic ring of aluminum ensuring a high-definition & efficiency across its fixed playback. Connectors w/quick couplings * Nominal impedance: 8 ohms * Minimum impedance at 9,400 Hz: 7.8 ohms * Frequency response at -10 dB: 4,000 to 20,000 Hz * 40 x 40 degrees sound dispersion * Recommended maximum program power while using crossover at 8000 Hz: 300 Watts * Recommended maximum program power while using crossover at 5000 Hz: 200 Watts * Diaphragm material: Phenolic * Voice coil diameter:.42 (1.6) mm (in)

## Features

- Super tweeter for outstanding detail & clarity in high-frequencies without harshness. The St400 TRIO may be used individually in lower power systems or arrayed for increased coverage & SPL in higher power systems. The base & diffuser are constructed of aluminum contributes to better heat dissipation of the coil moves, w/finish machining of diamond (diamond tool) & varnished.
- The bullet-shape horn design offers a longer throw 40 Degrees x 40 Degrees dispersion. The phenolic annular diaphragm is long-lasting, cost-effective & more natural-sounding than metallic diaphragms.
- The use of high-temperature materials & adhesives improves power handling & produces exceptionally high acoustic output. Together w/magnetic ring of aluminum ensuring a high-definition & efficiency across its fixed playback. Connectors w/quick couplings
- * Nominal impedance: 8 ohms * Minimum impedance at 9,400 Hz: 7.8 ohms * Frequency response at -10 dB: 4,000 to 20,000 Hz * 40 x 40 degrees sound dispersion
- * Recommended maximum program power while using crossover at 8000 Hz: 300 Watts * Recommended maximum program power while using crossover at 5000 Hz: 200 Watts * Diaphragm material: Phenolic * Voice coil diameter:.42 (1.6) mm (in)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XGR65FV |
| Additional Features | Durable, Lightweight |
| Age Range Description | Adult |
| Antenna Location | vehicle sound systems |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Audio output mode | Stereo |
| Battery Average Life | 10 Hours |
| Brand | Selenium |
| Built-In Media | Connectors with quick couplings |
| Compatible Devices | Television |
| Connectivity Protocol | Ethernet |
| Connectivity Technology | wired |
| Connectivity technology | wired |
| Control Method | App |
| Controller Type | ring |
| Enclosure Material | Aluminum |
| Frequency Response | 20000 Hz |
| Frequency response | 20000 Hz |
| Impedance | 8 Ohms |
| Is Waterproof | False |
| Item Dimensions D x W x H | 15.2D x 11.9W x 14H centimeters |
| Item Weight | 1.69 kg |
| MP3 player | No |
| Manufacturer | DEEJAYLED |
| Model Name | JBL SUPER HIGH FREQUENCY TWEETER |
| Model Number | ST400TRIO |
| Mounting Type | Magnetic Mount |
| Mounting type | Magnetic Mount |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 300 Watts |
| Speaker Size | 1.6 Inches |
| Speaker Type | Tweeter |
| Speaker maximum output power | 300 Watts |
| Specific Uses For Product | vehicle sound systems |
| Subwoofer Diameter | 12 Inches |
| Tweeter Diameter | 1.6 Inches |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Audio Output Mode:** Stereo
- **Brand:** Selenium
- **Connectivity Technology:** wired
- **Frequency Response:** 20000 Hz
- **Speaker Maximum Output Power:** 300 Watts

## Images

![ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet - Image 1](https://m.media-amazon.com/images/I/61lbj7jZ28L.jpg)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-21*