







STX Audio SX402 4 Inch 2-Way Coaxial Car Speakers 350W 4 Ohm Pair
- Pair of 4-inch coaxial car speakers
- 2-way design with integrated tweeters
- 4-ohm nominal impedance
- 80W RMS per pair
- 85 Hz to 22 kHz response
Product Info
| Brand | STX AUDIO |
|---|---|
| Model / SKU | SX402 |
| UPC | 783501191841 |
| Availability | In stock and ready to quote |
The STX Audio SX402 Street Series is a pair of 4 inch 2-way coaxial car speakers designed as a compact upgrade for factory speaker locations. With 350W maximum power handling and 80W RMS per pair, these 4 ohm speakers are suited for use with compatible factory and aftermarket head units. Each speaker uses a black injection-molded cone and rubber edge surround to support controlled midbass response. A 1 inch aluminum voice coil and 10 oz magnet work with the coaxial design to reproduce music across an 85 Hz to 22 kHz frequency response range. The 88 dB sensitivity supports efficient operation in a variety of vehicle audio setups. Black steel baskets and gold-accented grilles give the speakers a distinctive Street Series appearance. The SX402 pair is suited for many 4 inch door, dashboard, and rear deck speaker positions. Two speakers and matching grilles are included.
- POWER - Rated for 350W maximum power and 80W RMS per pair, these 4 inch coaxial speakers offer a capable upgrade for factory or aftermarket car audio systems while operating at a standard 4 ohm impedance.
- DESIGN - The 2-way coaxial configuration combines midrange and high-frequency reproduction in a compact 4 inch format, helping create a practical sound upgrade for vehicle doors, dashboards, and rear deck locations.
- CONTROL - Black injection-molded cones pair with rubber edge surrounds to support controlled cone movement and defined midbass response, while the 85 Hz to 22 kHz frequency range covers essential musical detail.
- COMPONENTS - Each SX402 speaker features a 1 inch aluminum voice coil and 10 oz magnet structure for dependable performance, with 88 dB sensitivity to work efficiently with compatible factory and aftermarket head units.
- FITMENT - Built as a direct replacement option for many 4 inch factory speaker positions, the compact coaxial design is suited for door panels, dash openings, and rear deck applications where space is limited.
- COMPLETE - This Street Series set includes two STX Audio SX402 4 inch speakers and matching grilles, featuring black steel baskets with gold accent grille styling for a clean, coordinated appearance.
| Brand | STX Audio |
|---|---|
| Model | SX402 |
| UPC | 783501191841 |
| Series | Street Series |
| Speaker Size | 4 in |
| Metric Speaker Size | 10 cm |
| Speaker Type | Coaxial car speaker |
| Way Design | 2-way |
| Speakers Per Package | 2 |
| Maximum Power | 350W per pair |
| RMS Power | 80W per pair |
| Impedance | 4 ohms |
| Frequency Response | 85 Hz to 22 kHz |
| Sensitivity | 88 dB |
| Voice Coil Diameter | 1 in |
| Voice Coil Material | Aluminum |
| Magnet Weight | 10 oz |
| Cone Material | Black injection-molded cone |
| Surround Material | Rubber edge surround |
| Basket Material | Black steel |
| Grilles | Matching grilles included |
| Grille Finish | Gold-accented styling |
| Suggested Mounting Locations | Compatible door, dashboard, and rear-deck positions |
This product uses a 4" speaker size. Pick your vehicle to see the factory locations it fits.
Select your year, make, and model above.
Vehicle not listed? Contact us and we’ll check the fit for you.
Will these fit my vehicle?
The SX402 is intended for compatible 4-inch speaker locations. Confirm your vehicle's opening size, mounting depth, screw pattern, and terminal clearance before ordering.
Can I use these with my factory radio?
They have a 4-ohm impedance and are described for compatible factory or aftermarket head units. Output capability varies by radio, so avoid excessive volume that causes audible distortion.
What power should I match to these speakers?
The pair is rated for 80W RMS and 350W maximum power. Use the RMS figure as the primary reference when matching compatible amplification.
Are these component speakers?
No. The SX402 is a 2-way coaxial speaker design, with high-frequency reproduction integrated into each speaker assembly.
What is included in the package?
The set includes two SX402 speakers and matching grilles. Mounting hardware, wiring adapters, and vehicle-specific brackets are not confirmed.


















