You can move your self-hosted podcast to Omny Studio without losing your existing subscribers. You will need to tell iTunes, other podcast directories and podcast apps to pull from your new RSS feeds.
The first thing to do is to import your existing podcast into your Omny Studio account. You may have already done this when you set up the account, but if not, just open up a playlist and click "Import a Podcast".
Omny Studio generates RSS feeds for every playlist. Find the RSS feed URL in the “Details” tab of your playlist.
1) Import your old episodes from Audioboom. Here's the guide on how to do this: http://help.omnystudio.com/setting-up-a-podcast/importing-an-existing-podcast-into-omny-studio
2) Once you've imported your podcast, you'll need to apply a re-direct to your audioboom feed to point to the Omny one. Here's an email template to send to firstname.lastname@example.org for them to do this.
I'm moving my podcast to a new host provider and kindly request that you apply a redirect for the following show ASAP
Can you please apply a 301 (if available) or itunes <itunes:new-feed-url /> redirect from INSERT AUDIOBOOM RSS to INSERT NEW OMNY RSS ASAP
We will need this redirect kept in place for a minimum of 4 weeks.
Please let me know if you need any more information and an advised timeline would be greatly appreciated as well.
Thanks in advance.
You can find your Omny RSS feed using this guide: http://help.omnystudio.com/frequently-asked-questions/where-is-my-rss-feed
3) Finally, you can start uploading your new episodes using this guide: http://help.omnystudio.com/uploading-clips-and-editing-audio/uploading-a-new-podcast-episode