It might help, follow the procedure below to troubleshoot this issue:
Turn off the stereo receiver.
Ensure the speaker wires are properly connected to both the speakers and stereo receiver.
Turn off any nearby electronic devices that may be interfering with the speaker sound.
Move the speaker wires away from any electrical cords.
If the issue is still unresolved, reset the receiver to the factory default settings.
Try replacing the speaker wires.
If possible, connect a different set of speakers.
NOTE: If the problem is eliminated when different speakers are connected, the issue is with the original speakers. If the problem is not eliminated, then the problem is with the receiver.
