Digital Power Amplifier Card 2 Channel Audio Amplifier Module with Cooling Fan TDA8954TH 1. Dedicated Inductor: The digital power amplifier card adopts special inductance for audio to ensure the sound is clear and powerful.2. Good heat dissipation: equipped with fan, and the heat dissipation area is large, which can better maintain long-term work.3. Perfect resistor: High accuracy SMD resistor is selected to ensure good signal to noise ratio of the whole machine.4. 2 Channel Design: Dual channel design has a power amplifier board with low interference and fast frequency response.5. Multiple Applications: Typically used in home theaters, multimedia rooms, small conference rooms or loudspeaker equipment, etc. Specification: Item Type: Digital Amplifier Board Material: PCB Input Voltage: AC 24V 24V (Recommended Power Supply Voltage: AC24V-0-AC24V) Frequency Response: 10Hz to 21KHz Number of Channels: 2 Output Power: 2 x 420W Output Impedance: 4-8 Omega; Package List: 1 x Digital Amplifier Board Note: Do not overload to use.