When migrating from Podbean to a new hosting company/feed:

If you’re migrating from Podbean and wish to redirect your listeners to a new feed, please log into your Podbean account, then visit this link http://www.podbean.com/feed-redirect-301 to add the 301 redirect.

Your Podbean listing in the directory and app will now automatically be populated by the new feed (and you will maintain your followers).