Many expect that the product will contain the word Home and then is the most logical names Apple Home, Beats Home, Ihome, or Siri Home.
the Other a proposal containing the word Speaker (speakers), including the Apple Speaker, Ispeaker, and Siri Speaker.
Ihome and Ispeaker is already used by other companies, so we can probably count.
Apple's next event is the WWDC that held on June 5 in San Jose, California.
Since this is a trade fair for developers, the focus is on new versions of IOS, Mac OS, TV of the OLYMPICS and Watch the OLYMPICS, but it is not impossible that we'll see new hardware.
If Apple choose to open up the Siri-speaker of third-party developers, it would be logical to give these a few months to develop the program, so then it might be a preview in June and säljstart in september/October.