STX Audio STX2200.5DBT 5-Channel Class D Amplifier

The STX Audio STX2200.5DBT is a 5-channel Class D car amplifier designed to run a complete vehicle audio system from one compact chassis. It combines four full-range amplifier channels for speakers with a dedicated fifth channel for a subwoofer. This layout helps simplify an upgrade when separate amplifiers are not desired.

Its stated output is 130 watts RMS across each of the four full-range channels and 330 watts RMS for the subwoofer channel at 2 ohms. That configuration is suited to systems using front and rear speakers along with a single subwoofer section. The amplifier is rated for up to 2200 watts maximum power.

Integrated Bluetooth streaming lets compatible devices send music wirelessly to the amplifier. This can add playback convenience in applications where a Bluetooth audio source is preferred. It is intended as an audio-streaming feature rather than a replacement for the vehicle's full head-unit controls.

The STX2200.5DBT uses a Class D MOSFET design focused on efficient amplification in a vehicle environment. Its construction is described with SMT components and a double-sided FR-4 circuit board. Adjustable high-pass and low-pass filters, along with bass boost, provide basic system-tuning controls.

For a new build or a factory-system upgrade, this amplifier can serve as the central power stage for full-range speakers and bass. Integrated protection circuitry is specified for overheating, overload, short-circuit, and low-voltage conditions. Proper speaker impedance, power wiring, grounding, and installation practices remain important for dependable operation.

Key Features

• Five-Channel Layout: Powers four full-range channels plus one subwoofer channel.
• RMS Output: Delivers 130W x 4 and 330W RMS at 2 ohms.
• Bluetooth Streaming: Supports wireless music playback from compatible devices.
• Class D MOSFET Design: Provides efficient amplification in a compact format.
• Adjustable Filters: High-pass and low-pass controls help tailor system response.
• Protection Circuits: Helps guard against heat, overload, shorts, and low voltage.

Design & Installation

The amplifier is built with premium SMT components and a double-sided FR-4 PCB design. Its Class D architecture is intended to provide efficient operation while the compact chassis supports flexible placement in a vehicle audio installation. The design includes integrated protection circuitry to help support reliable use under specified fault conditions.

Use the four full-range channels with appropriately matched vehicle speakers and reserve the dedicated fifth channel for a compatible subwoofer load. Install it with correctly sized power, ground, speaker, and signal wiring selected for the system, and set the high-pass, low-pass, and bass-boost controls during final tuning. Bluetooth streaming requires a compatible Bluetooth audio device.