---
product_id: 379794239
title: "Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz"
brand: "xtremevision"
price: "¥1700"
currency: JPY
in_stock: false
url: https://www.desertcart.jp/products/379794239-xtremevision-4x-soundxtreme-st-603-6-inch-3-way-350
store_origin: JP
region: Japan
---

# 89 dB sensitivity 65Hz-20kHz frequency range 350W peak power Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz

**Brand:** xtremevision
**Price:** ¥1700
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Elevate your ride’s soundtrack — don’t just drive, dominate the road!

## Quick Answers

- **What is this?** Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz by xtremevision
- **How much does it cost?** ¥1700 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/379794239-xtremevision-4x-soundxtreme-st-603-6-inch-3-way-350)

## Best For

- xtremevision enthusiasts

## Why This Product

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

## Key Features

- • **Full Spectrum Audio:** Wide 65Hz to 20kHz frequency range captures every beat, from deep bass to crisp highs.
- • **Precision Tweeter Tech:** 30mm PEI dome tweeter ensures sharp, detailed highs for an immersive listening experience.
- • **Built to Last & Perform:** Robust 20 oz magnet and high-temp ASV voice coil handle intense power without distortion.
- • **Effortless Installation:** Spade terminals make upgrading your car audio system quick and hassle-free.
- • **Power That Packs a Punch:** 350W peak power delivers booming, crystal-clear sound that transforms your drive.

## Overview

The Xtremevision 4X Soundxtreme ST-603 is a 6-inch 3-way coaxial car speaker system delivering up to 350 watts peak power with a 20 oz magnet structure. Featuring a poly injection cone woofer and a 30mm PEI dome tweeter, it offers a wide frequency response from 65 Hz to 20 kHz and 89 dB sensitivity, ensuring rich, clear sound. Designed for durability and easy installation, it’s the perfect upgrade for audiophiles seeking powerful, high-fidelity in-car audio.

## Description

4 Speaker Three-Way Sound Speaker System - 175 W RMS/350W Power Handling w/ 4 Ohm Impedance and 3/4'' Piezo Tweeter for Car Component Stereo, Round Shaped Pro Full Range Triaxial Loud Audi

## Features

- 180W RMS AND 360W PEAK: This 6” x 5” car speaker can provide up to 175 watts RMS or 350 watts peak power because it is a 20 oz magnet structure. A pair of 6” x 5” 175-watt speakers - carrying both the high and low end for a fuller range sound
- RIAXIAL SPEAKER SYSTEMS: The 6.5-inch woofer features an eye-catching poly injection cone for plenty of stiffness without added weight. The 1.2 -inch ASV voice coil is ready for high-temperature, high-wattage situations
- Spade speaker terminals for easy installations
- Sensitivity: 89 dB / Frequency response: 65 Hz - 20k Hz
- Midrange and tweeter: 30 mm PEI Dome Tweeter

## Product Details

- **Brand:** Xtremevision
- **Speaker maximum output power:** 350 Watts
- **Connectivity technology:** Coaxial
- **Audio output mode:** Stereo
- **Mounting type:** Coaxial,Car Audio,Car

## Images

![Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz - Image 1](https://m.media-amazon.com/images/I/8102WFxgjBL.jpg)
![Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz - Image 2](https://m.media-amazon.com/images/I/716cIx4XgZL.jpg)
![Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz - Image 3](https://m.media-amazon.com/images/I/61pKgIyvecL.jpg)
![Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz - Image 4](https://m.media-amazon.com/images/I/71fWJoA6Z5L.jpg)
![Xtremevision 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz - Image 5](https://m.media-amazon.com/images/I/81EDA4PNetL.jpg)

## Frequently Bought Together

- 4X Soundxtreme ST-603 6-Inch 3-Way 350 Watts Maximum Power Coaxial Car Audio Speakers with PEI Dome Tweeter 4 Ohms Impedance, 89 dB Sensitivity, Frequency 65 Hz - 20kHz
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**Shop now:** [https://www.desertcart.jp/products/379794239-xtremevision-4x-soundxtreme-st-603-6-inch-3-way-350](https://www.desertcart.jp/products/379794239-xtremevision-4x-soundxtreme-st-603-6-inch-3-way-350)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-24*