STX Audio STX1000-1D 1000W Monoblock Class D Amplifier

The STX Audio STX1000.1D is a single-channel Class D amplifier designed for car-audio systems. It provides a mono amplification path for a dedicated bass-focused speaker or subwoofer system. The published rating lists 600 watts RMS power and up to 1000 watts maximum output.

This amplifier is suited to listeners building or upgrading a vehicle audio system that needs more low-frequency output than a factory radio can provide. Its 1-ohm-stable design supports compatible low-impedance mono loads. Confirm the final speaker wiring impedance before installation.

The STX1000.1D combines a 600W RMS rating with adjustable bass boost and a low-pass filter. These controls allow the installer to tailor low-frequency emphasis and limit the amplifier's output to the bass range. Exact crossover range and bass-boost range are not published in the confirmed product data.

Class D operation and a MOSFET circuit design are specified for this model. The compact mono format keeps the amplifier focused on one amplification channel rather than a full-range multi-channel system. It is intended for 12-volt vehicle audio applications, with a listed maximum supply voltage of 14V DC.

Use the STX1000.1D as part of a complete car-audio upgrade with a compatible subwoofer or mono speaker load, appropriate power wiring, and a suitable source signal. Its adjustable low-pass filter can help integrate the amplifier into a system that also uses separate full-range speakers. Select connected speakers according to their actual impedance and power-handling specifications.

Key Features

• Mono Class D Design: Provides one dedicated amplification channel for a bass-oriented car-audio system.
• 600W RMS Rating: Delivers a published continuous-power rating for compatible audio applications.
• 1000W Maximum Output: Supplies the listed maximum output capability for higher-demand playback.
• 1-Ohm Stability: Supports compatible mono loads wired to a 1-ohm impedance.
• Adjustable Bass Boost: Lets the installer increase bass emphasis to suit the system.
• Adjustable Low-Pass Filter: Helps direct the amplifier's output toward low-frequency reproduction.

Design & Installation

The STX1000.1D uses Class D amplification with a MOSFET circuit design and a single-channel layout. Confirmed listing data identifies semiconductor materials and a freestanding mounting type, but does not publish chassis material, terminal construction, or unit dimensions. Package dimensions are listed separately and should not be treated as installed amplifier dimensions.

Mount the amplifier securely in a dry, ventilated vehicle location and wire it for a compatible mono load that does not fall below 1 ohm. Use properly selected vehicle power, ground, fuse, speaker, and signal wiring for the installation; confirmed product data does not specify wire gauge, fuse rating, terminal sizes, or included wiring. Set bass boost and the low-pass filter conservatively during initial setup, then adjust them to match the rest of the system.