Thanks Katie, I have replied via a reply to your email:
Thanks for your response and suggestions. The issue is with the wire that connects the speaker to the board, I can get it to work by wiggling the cable, it appears to be a bad connection inside the speaker unit itself. I have tried cleaning the external connectors, I am using the USB power bit so I don’t think it is a power issue.
Thanks for your help, much appreciated.
I did report this to firstname.lastname@example.org initially.