Once the speaker has been powered and even before connecting to the network, the speaker's LED is solid purple, and there is buzzing feedback. 

If this happens, this will be due to the power connection. Take out the power supply from the speaker and plug it back in.

After doing this the speaker will go into a pairing state, and the LED will start to fast flash green (ready for pairing). You will then be able to set up the speakers as normal. 

However, If the speaker remains to have a buzzing feedback and the LED is still purple, please contact us at support@litheaudio.com