---
product_id: 461804801
title: "ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet"
brand: "selenium"
price: "¥29211"
currency: JPY
in_stock: true
reviews_count: 2
category: "Selenium"
url: https://www.desertcart.jp/products/461804801-st400trio-8-ohm-super-frequency-tweeter-with-barium-ferrite-magnet
store_origin: JP
region: Japan
---

# 8 Ohm nominal impedance for precise load matching 40° x 40° dispersion for wide, immersive sound coverage 300W max program power for powerful, distortion-free highs ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet

**Brand:** selenium
**Price:** ¥29211
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your sound game with precision-tuned clarity that commands attention!

## Quick Answers

- **What is this?** ST400TRIO 8 Ohm Super Frequency Tweeter with Barium Ferrite Magnet by selenium
- **How much does it cost?** ¥29211 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/461804801-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

- • **Robust Power Handling:** Handles up to 300W program power, delivering punchy, dynamic highs even in demanding setups.
- • **Precision Aluminum Build:** Diamond-machined aluminum base and diffuser ensure superior heat dissipation and durability.
- • **Wide Soundstage Coverage:** Bullet-shaped horn design offers a focused 40° x 40° dispersion for immersive audio environments.
- • **Crystal-Clear High Frequencies:** Experience ultra-detailed sound without harshness, perfect for audiophiles and pros alike.
- • **Long-Lasting Phenolic Diaphragm:** Natural, smooth sound with enhanced longevity compared to metallic alternatives.

## Overview

The Selenium ST400TRIO is a professional-grade 8 Ohm super frequency tweeter featuring a phenolic diaphragm and diamond-machined aluminum components for superior heat management and durability. With a 40° x 40° dispersion and power handling up to 300W, it delivers crisp, natural high frequencies ideal for both individual and arrayed use in high-performance audio systems.

## Description

JBL SUPER HIGH FREQUENCY TWEETER

Review: JBL worth the money. This is my second JBL selenium - very smooth sound. This is my second JBL selenium super tweeter. I have it hooked up to my home audio center channel. Beware. Thris unit is massive in size and sound. Even at low volume you can hear the difference . Like being in a movie theater without the harshness of other brands. Recommended for professional use.
Review: Used Items

## 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 |
| Audio Driver Type | Dynamic Driver |
| Best Sellers Rank | #156,225 in Electronics ( See Top 100 in Electronics ) #263 in Car Tweeters |
| Compatible Devices | Laptop, Desktop, Television |
| Control Method | App |
| Customer Reviews | 4.7 4.7 out of 5 stars (21) |
| Date First Available | March 9, 2017 |
| Impedance | 8 Ohms |
| Included Components | Connectors with quick couplings |
| Is Waterproof | False |
| Item Weight | 3.73 pounds |
| Item model number | ST400TRIO |
| Manufacturer | DEEJAYLED |
| Material | aluminum, phenolic |
| Model Name | JBL SUPER HIGH FREQUENCY TWEETER |
| Mounting Type | Magnetic Mount |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 6"D x 4.7"W x 5.5"H |
| Recommended Uses For Product | vehicle sound systems |
| Shape | cylindrical |
| Speaker Size | 1.6 Inches |
| Speaker Type | Tweeter |
| Special Feature | Durable, Lightweight |
| Specific Uses For Product | vehicle sound systems |
| Style | Modern/Industrial |
| 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:** 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ JBL worth the money. This is my second JBL selenium
*by D***N on May 7, 2023*

very smooth sound. This is my second JBL selenium super tweeter. I have it hooked up to my home audio center channel. Beware. Thris unit is massive in size and sound. Even at low volume you can hear the difference . Like being in a movie theater without the harshness of other brands. Recommended for professional use.

### ⭐⭐ Used Items
*by A***. on September 16, 2023*



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**Shop now:** [https://www.desertcart.jp/products/461804801-st400trio-8-ohm-super-frequency-tweeter-with-barium-ferrite-magnet](https://www.desertcart.jp/products/461804801-st400trio-8-ohm-super-frequency-tweeter-with-barium-ferrite-magnet)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-07*