- Ensure all wiring is correct (connect the positive speaker wire to the positive amplifier terminal, negative to negative, and ensure that the speaker wires do not touch each other, as this can cause a short circuit and potentially damage the amplifier).
- Try using a different power supply and socket.
- Check that the light on the power adapter and amplifier are still on.
- Try using a different audio source, speaker wire, speaker, input cable, and ensure that the audio source is turned on and not set to the minimum volume.
- If there are multiple input modes, confirm if the other modes are working properly (e.g. if Bluetooth is not working on BT20A, confirm if RCA is working). If there are multiple output modes, confirm if the other outputs are working properly (e.g. if the speaker output is not working on T20, confirm if the headphone output is working).
- If it is a tube amplifier (e.g. T20, T3), ensure that the tubes are inserted correctly, switch the tubes on both sides and replace them with other functional tubes
If you have any questions or concerns, please don't hesitate to contact support@fosiaudio.com.
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