Set defaults for Echo Stereo

[DButchart51]

I set up Echo Stereo with two Gen3 Echos and the Echo Subwoofer.  I named the setup "Stereo" (so I'm not imaginative). Very good sound, but I'm trying out Amazon Music Unlimited and it can get a bit tricky to get out:  "Alexa, play classic rock from Amazon music unlimited on Stereo".  Is there a way to set up Amazon Music Unlimited as a default source?  Alexa does just fine with "Alexa, play classic rock on Stereo".  It's harder to get out the longer phrase correctly.  Even worse if I want to request, say, "Beethoven's 9th Symphony" from Amazon music unlimited.

[jwlv]

You can set your default source in the Alexa app.

[DButchart51]

Thanks.  I updated my Alexa App on my Android phone and see that I have Amazon Music set as the default source - will it automatically default to Amazon Music Unlimited because I have the Unlimited subscription?  I'm not offered a choice to add unlimited - when I click on the Amazon Music source it does say "Play all the music you love on your Echo with Amazon Music Unlimited" - if I select "Link New Service" I don't get the choice to link Unlimited.