ZK-ST21 Bluetooth-Compatible 2.1 Channel Digital Power Subwoofer Amplifier Module – 100W+100W+200W with TPA3221 Chip

Unleash the full power of your audio setup with the ZK-ST21 Bluetooth-Compatible 2.1 Channel Amplifier Module—an elite upgrade for audiophiles, home theater fans, and DIY speaker builders alike. Engineered for raw performance and immersive bass, this compact beast delivers 100W + 100W for left/right channels and 200W for the subwoofer, all driven by dual TPA3221 chips for ultra-clear sound and deep, booming lows.

Featuring Bluetooth 5.1 technology with a 15-meter range, multiple input options (BT, AUX, USB driver, and sound card), and a lightweight yet durable ABS casing, this amplifier module blends versatility and power into one sleek, portable board. Perfect for desktops, home entertainment systems, garage setups, or car audio customization.

Key Features:
• Immersive 2.1 Channel Sound: Left, right, and subwoofer output for full-spectrum audio
• Bluetooth 5.1 Chip (Jerry): Stable connection up to 15 meters
• Powerful TPA3221 Chipset: Delivers ultra-low distortion with maximum punch
• Versatile Inputs: BT, AUX, USB driver, and sound card ready
• Compact Build: Measures approx. 124 x 100 x 24mm – small enough to install anywhere
• Easy Setup: Plug, play, and rock your space

Perfect For:
Audiophiles, home theater enthusiasts, car audio mods, DIY speaker kits, garage jam sessions, and sound system upgrades.

ZK-ST21 Bluetooth-Compatible Digital Power Amplifier Board 2.1 Channel Digital Power Subwoofer Amplifier 100W+100W+200W Chip TPA3221 DC12-30V Feature: 1. High-Power Digital Amplifier Board: Experience superior sound quality with our digital power amplifier board, featuring high-current, low-magnetic loss, and low-heat design. Oxygen-free copper wiring enhances audio fidelity while magnetic shielding resists electromagnetic interference. 2. Advanced Amplifier Module with Dual TPA3221 Chips: This amplifier module supports a 2.1-channel Bluetooth-Compatible digital amplifier with an impressive 100W+100W+200W output, ensuring powerful and clear audio for all your entertainment needs. 3. Versatile Digital Power Subwoofer Amplifier: Our digital power subwoofer amplifier includes a subwoofer expansion port, compatible with 1602 and 3002 installations, offering flexibility and enhanced bass performance for your audio setup. 4. Expandable Digital Amplifier Board: The digital amplifier board features multiple expansion ports, allowing easy connection to microphone preamp boards for reverb input or output, making it user-friendly and versatile for various audio applications. 5. Comprehensive Protection with MP Board: The mp board is equipped with robust protection mechanisms, including input undervoltage, reverse polarity protection, overheat, overcurrent, and short circuit protection, ensuring reliable and safe operation. Specification: Origin: Mainland China Product name: 2.1 channel BT amplifier board 100W+100W+200W Product model: ZK-ST21 Applicable power supply: The working voltage range is 12-30VDC. It is recommended to use a DC power supply with a voltage of 24V-28V and a current of 10A or above. Maximum power: Left or right channel----105W@30V, 4Ω; 55W@30V, 8Ω. Subwoofer----208W@30V 2Ω; 105W@30V, 4Ω. In short, the higher the voltage, the smaller the resistance, and the greater the output power. Applicable speakers: Left and right channels support speakers up to 3-8Ω and 100W; subwoofer supports speakers up to 2-8Ω and 200W. BT chip: Jerry 5.1, transmission distance 15 meters Input method: BT+AUX+USB driver+sound card Number of channels: 2.1, left channel+right channel+subwoofer Power amplifier chip: two TI original TPA3221 Protection mechanism: input undervoltage, input reverse connection protection, overheating, overcurrent, short circuit protection. Casing material: ABS Product size: about 124.00x100.00x24.00mm Product size: 4.88x3.94x0.94inch Note: Due to different monitor settings and lighting conditions, the actual color of the item may vary slightly from the pictures. Thanks for your understanding! Please allow a 1-2 cm difference in measurements due to manual measuring. 1 x Bluetooth-Compatible Digital Power Amplifier Board .