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[Audio Amplifier Board]: Large heat dissipation area, can better improve the service life
[High Power]: High power makes low stress more sensational
[3.5mm]: With 3.5mm stereo interface, perfect sound quality
[Premium Material]: Made of high quality material, durable and long service life
[Simple Structure]: Simple structure and design, easy to install and remove
Specification: Item Type: Audio Amplifier BoardProduct Model: XH-M553 Output Power: 20W x 2 + 30W Power Supply Type: AC dual 12V Chip Type: TDA2030A Amplifier Type: Analog circuit Signal to Noise Ratio: 110dB Quiescent Current: 40mA Cable Length: 20CM Frequency Range: 20Hz-60KHz Size: Approx. 80 x 74 x 47mm / 3.1 x 2.9 x 1.9in Number of Channels: 3 Heat Sink Size: Approx. 80 x 30 x 45mm / 3.1 x 1.2 x 1.8in Output Impedance: 4-80 speakers Plug Type: 3.5mm stereo interface Package List: 1 xAudio Amplifier Board1 BagKnob Nut Gasket Note: 1. The power requirements of the subwoofer cabinet and subwoofer are large enough 2. It is recommended to install a suitable sound-absorbing cotton in the subwoofer's box, in order to get a better super bass effect, you also need with a good subwoofer speaker 3. The power supply must use three lines of outputtransformer, and DC power such as battery adapters is absolutely not acceptable