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Compact 3-Way Upgrade for Clearer Car Audio
The SoundXtreme ST-503 5.25-inch coaxial speakers are designed to upgrade factory audio systems with improved clarity, balance, and output. The 3-way design separates sound into bass, midrange, and treble frequencies, delivering a more detailed and enjoyable listening experience compared to standard OEM speakers.
With a peak power handling of 320 watts per pair, these speakers provide strong output for their compact size, making them ideal for vehicles with smaller factory speaker openings.
Balanced Sound with Enhanced Highs & Mids
Built with a polypropylene woofer cone and flexible rubber surround, the ST503 delivers solid mid-bass response while maintaining durability over time. The PEI dome tweeter and super tweeter work together to enhance high-frequency detail, producing crisp vocals and clear instrument separation.
This combination ensures a well-balanced sound signature suitable for a wide range of music styles, from pop and rock to hip-hop and electronic.
Easy Installation & Reliable Everyday Performance
Designed for 5.25-inch factory speaker replacements, the ST-503 offers a straightforward upgrade path for many compact vehicle applications. Its standard mounting depth and 4-ohm impedance make it compatible with most factory head units and aftermarket stereos.
Engineered with heat-resistant materials and a durable steel basket, these speakers are built to handle daily driving conditions while maintaining consistent audio performance.
Highlights
- 3-way coaxial design for full-range sound separation
- 5.25-inch speaker size for compact vehicle compatibility
- 320W peak power handling per pair
- 4-ohm impedance for wide system compatibility
- Polypropylene woofer for strong mid-bass performance
- Flexible rubber surround for improved durability
- PEI dome tweeter for crisp high-frequency response
- Additional super tweeter for enhanced detail
- Frequency response range: 55Hz – 20kHz
- 90dB sensitivity for efficient sound output
- Steel basket construction for durability
- Heat-resistant design for long-term reliability
Package Contents
- 2 × SoundXtreme ST-503 5.25" 3-Way Coaxial Speakers (Pair)
- 1 × Speaker Wire Set
- 1 × Mounting Screw Kit
- 1 × User Installation Manual