Misread your post a while up. If you have an Android phone, then you can download Amazon Prime music to it and play it via Bluetooth to your speaker...
Download Music for Offline Playback Using the Android App
Amazon Music Unlimited and Amazon Music Prime songs can be downloaded for offline playback.
- Select the song, album, or playlist you want to download.
- Tap the More Options menu, and tap Download.
Amazon Music Unlimited and Amazon Music Prime titles are only accessible within the Amazon Music app. It's not possible to export titles for use on other apps and devices. Amazon Music Unlimited and Amazon Music Prime titles can't be copied onto CDs or other external storage.
If you previously downloaded music in Standard quality, download your music again in HD, Ultra HD, or Spatial Audio to listen offline in these formats.
If you would like to play downloaded songs without using mobile data, please be sure that your songs are downloaded in Best Available quality.
For more information on managing data usage, see
Manage Data Usage in the Amazon Music