2.1 Channel Bluetooth Amplifier Board - 100W+100W+200W Subwoofer TPA3221, Supports Bluetooth, AUX, U Disk, Sound Card

Features:

1. Utilizes high-power digital power amplifier inductance, offering high current, low magnetic loss, and reduced heat generation. Features oxygen-free copper wire for superior sound quality and a magnetic shielding mechanism to counter electromagnetic interference.
2. Incorporates two TPA3221 chips, supporting a 2.1 channel Bluetooth digital amplifier with 100W + 100W + 200W high power output.
3. Includes a subwoofer expansion port, compatible with 1602 and 3002 installations.
4. Comes with multiple expansion ports, allowing connections to microphone front stage board reverb input or output for easy use.
5. Equipped with a robust protection mechanism that guards against input undervoltage, reverse connection, overheating, overcurrent, and short circuit issues.

Specifications:

• Product Name: 2.1 Channel BT Amplifier Board 100W + 100W + 200W
• Product Model: ZK-ST21
• Power Supply: Operates on 12-30VDC; recommended DC power supply is between 24V-28V with a current of 10A or more.
• Maximum Power Output:
  • Left/Right Channel - 105W@30V, 4 Ω; 55W@30V, 8 Ω
  • Subwoofer - 208W@30V, 2 Ω; 105W@30V, 4 Ω
  Greater output power with higher voltage and lower resistance.
• Compatible Speakers:
  • Left/Right Channels support 3-8 Ω, up to 100W
  • Subwoofer supports 2-8 Ω, up to 200W
• Bluetooth Chip: JieLi 5.1, 15 meters transmission distance
• Input Methods: Bluetooth, AUX, USB drive, sound card
• Number of Channels: 2.1 (Left Channel + Right Channel + Subwoofer)
• Amplifier Chip: Two TI original TPA3221
• Protection Mechanism: Guards against input undervoltage, reverse connection, overheating, overcurrent, and short circuit.
• Product Size: 121 x 100 x 25 mm

Package Includes:

• Type 1: 1 x Amplifier Board
• Type 2:
  • 1 x Amplifier Board
  • 1 x Shell Kit
• Type 3:
  • 1 x Amplifier Board (External Lead Type)

Attention:

1. Shipping does not include power or audio cables.
2. Install External Antenna (special scenario):
   1. The boards feature onboard antennas with a typical range of 10-15 meters. When enclosed in a metal shell, which may block signals, or needing extended Bluetooth range (20-30 meters), external antennas are recommended.
   2. Customers need to purchase 2.4G antennas separately, as they are not included in this product.