Amazon Music Authorized Device Limits
Devices used to play Amazon Music must be authorized to your Amazon account, based on our license agreements with content providers.
Go to Your Amazon Music Settings to manage devices authorized to your account.
You can have up to 10 devices authorized to your account. Each device can only be authorized to one account at a time. Any device you download music to requires authorization. You can stream Amazon Music in a browser without authorizing the device. All mobile and tablet devices require authorization.
If there are 10 devices authorized to your account, you must deauthorize one before authorizing another device. You can deauthorize a device and authorize it to another account at any time.