Bluesound Powernode 2i as Music Streamer

I have a Bluesound Powernode 2i  as a music streamer and amp.  I want to upgrade by adding an amp. Can I then use the Bluesound Powernode as a music streamer?  It has only speaker output.  Will I need a Line output converter?  Where would I get one?  On my better system I have the Bluesound Node 2i and Parasound Halo 21+, which works fine.  Thanks.