I received this item on time but it was defective. I connected a 19vdc power supply with extra wiring so I can connect audio to my phone. With the outputs correct, I plugged it into a 4 ohm speaker and the output tone was 0. The LED was lit when I plugged it into mains, but nothing else. If I'm doing something wrong, please let me know. But there is 1 star because there was no instructions and no output. I'll update if I somehow get it working.
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