Contact Us for Pricing
Full-Range 3-Way Sound Performance Upgrade
The SoundXtreme ST-603 6-inch coaxial speakers deliver a full-range 3-way audio experience designed to significantly improve clarity and output over factory-installed systems. By separating audio into bass, midrange, and high frequencies, the system provides a more detailed and immersive listening experience across all music genres.
With a peak power handling of 350 watts per pair, these speakers offer strong performance for users seeking a louder, more dynamic soundstage in their vehicle.
Strong Bass Response & Clear High Frequencies
Built with a polypropylene woofer cone and flexible rubber surround, the ST-603 is engineered to produce solid mid-bass response while maintaining durability over time. The 30mm PEI dome tweeter and super tweeter enhance high-frequency detail, delivering crisp vocals and bright instrument separation.
This combination ensures balanced sound reproduction, making your music clearer, more vibrant, and more enjoyable during daily driving.
Durable Construction & Easy Installation Fit
Designed with a steel high-quality basket and heat-resistant components, the ST-603 is built to withstand demanding automotive environments. The 4-ohm impedance and moderate sensitivity make it compatible with most factory and aftermarket head units.
Its 6-inch size and standard mounting depth allow for straightforward replacement of OEM speakers, making it a practical upgrade without complex modifications.
Highlights
- 3-way coaxial speaker design for full-range audio clarity
- 6-inch speaker size for wide vehicle compatibility
- 350W peak power handling per pair
- 89dB sensitivity for efficient sound output
- 4-ohm impedance for broad system compatibility
- Polypropylene woofer for strong mid-bass performance
- Flexible rubber surround for improved durability and movement
- 30mm PEI dome tweeter for crisp high-frequency response
- Additional super tweeter for enhanced treble detail
- Frequency response range: 65Hz – 20kHz
- Steel basket construction for long-term durability
- Heat-resistant design for demanding audio conditions
Package Contents
- 2 × SoundXtreme ST-603 6" 3-Way Coaxial Speakers (Pair)
- 1 × Speaker Wire Set
- 1 × Mounting Screw Kit
- 1 × User Installation Manual