STX Audio STX10SD4 10" Shallow-Mount Subwoofer

The STX Audio STX10SD4 is a 10-inch shallow-mount subwoofer designed for vehicle audio systems with limited installation depth. Its compact profile helps make bass upgrades possible in spaces that may not accommodate a conventional full-depth subwoofer. It is suited to slim enclosures, under-seat applications, and other space-conscious custom installations.

With a stated 750-watt RMS power rating and 1,500-watt maximum power handling, the STX10SD4 is intended for systems that need substantial low-frequency capability from a compact driver. Its specified 25 Hz to 500 Hz frequency response supports deep bass reproduction while allowing flexible crossover integration. Proper amplifier matching and enclosure design remain important for reliable performance.

This model uses dual 4-ohm voice coils, giving installers multiple wiring configuration options when pairing it with a compatible mono or multi-channel amplifier. The dual-coil design can help accommodate system-planning needs that depend on the amplifier's supported impedance load. Confirm final wired impedance before connecting the subwoofer to an amplifier.

The STX10SD4 has a listed 3.23-inch mounting depth, making it a practical choice where enclosure depth is the primary limitation. Its shallow design supports compact box layouts without requiring the clearance of a traditional deep-basket subwoofer. This can be useful in trucks, coupes, sedans, and vehicles with limited cargo-space flexibility.

A die-cast aluminum basket provides the structural foundation for the driver and is intended to help reduce unwanted basket flex and vibration. The subwoofer can serve as the bass section of a new audio build or as an upgrade to a system that needs a space-efficient low-frequency driver. For best results, pair it with an appropriately rated amplifier, suitable enclosure, and correctly configured crossover.

Key Features

• 10-Inch Shallow-Mount Format: Delivers bass capability while fitting installations with limited depth.
• 750W RMS Power Handling: Supports use with a properly matched high-output amplifier.
• 1,500W Maximum Power: Provides stated short-term peak power-handling capacity.
• Dual 4-Ohm Voice Coils: Offers wiring flexibility for compatible amplifier configurations.
• 3.23-Inch Mounting Depth: Helps accommodate slim enclosures and tight vehicle spaces.
• Die-Cast Aluminum Basket: Provides a rigid driver structure for the installation.

Design & Installation

The STX10SD4 uses a die-cast aluminum basket in a shallow-format 10-inch design. This construction is intended to provide a durable mounting structure while supporting the compact depth requirement. The speaker's shallow profile is its central design advantage for installations where front-to-back clearance is restricted.

Measure available mounting depth, enclosure clearance, and cutout requirements before purchase, as a cutout diameter was not confirmed. Use an enclosure appropriate for a 10-inch shallow subwoofer and connect both 4-ohm voice coils according to an amplifier-safe wiring plan. A compatible amplifier, enclosure, wiring, and installation hardware are needed to complete a working system.