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the noise may be caused by interference with the power supply
mobile phone
There is still noise after troubleshooting the above two points，Please confirm the noise
check if the device that inputs the sound source is paused
automatic classification
AIYIMA Decoder Amplifier Size:Amplifier + 48v UK Power Supply the noise may be causedProduct descriptions: AIYIMA Amplifier:Stereo Max. output power: 2x300W (@4 0hm)Stereo Speaker impedance: 4 8 OhmSupply power : DC24 48V , 5A or more. 3. 5mm AUX Maximum Output level: 2. 3VFrequency response: 20 Hz ~ 20KHz1dBfor Speaker outputFrequency response: 20 Hz ~ 20KHz0. 5dBfor AUX outputS N ratio: 104 dBCOA OPT USB inputS N ratio: 100 dBBT RCA inputTHD: 0. 008%(@1W)COA OPT USB inputTHD: 0. 015%(@1W)BT RCA inputInput sensitivity: 0dBFS 0.
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