These are the speakers that work with AirPlay 2

With Tuesday's release of iOS 11.4 and tvOS 11.4, Apple has finally rolled out much anticipated support for AirPlay 2 and named a few dozen third party speaker systems that are expected support the new multi-room audio technology in the near future.

Among the list of speakers supporting AirPlay 2 are by Bang & Olufsen, Denon, Libratone, Marantz, Naim, and Sonos. While many of them are already on the market, such as those by Sonos, all of them are listed only as "announced" pending updates.

Only the Apple HomePod supports AirPlay 2 as of Tuesday. The long-delayed streaming format's main upgrade is multi-room audio support, letting people pump sound across multiple speakers, or shift it from one room to another.

Third-party products set to gain support include:

• Beoplay A6
• Beoplay A9 mk2
• Beoplay M3
• BeoSound 1
• BeoSound 2
• BeoSound 35
• BeoSound Core
• BeoSound Essence mk2
• BeoVision Eclipse [audio only]
• Denon AVR-X3500H
• Denon AVR-X4500H
• Denon AVR-X6500H
• Libratone Zipp
• Libratone Zipp Mini
• Marantz AV7705
• Marantz NA6006
• Marantz NR1509
• Marantz NR1609
• Marantz SR5013
• Marantz SR6013
• Marantz SR7013
• Naim Mu-so
• Naim Mu-so QB
• Naim ND 555
• Naim ND5 XS 2
• Naim NDX 2
• Naim Uniti Nova
• Naim Uniti Atom
• Naim Uniti Star
• Sonos One
• Sonos Play:5
• Sonos Playbase

There are no dates associated with the listed products, so it isn't clear precisely when support from the vendors will arrive.

Missing are other brands Apple has teased, namely Bluesound, Bose, Bowers & Wilkins, Marshall, and Pioneer.

Apple also used Tuesday to introduce stereo pairing for HomePods, Messages in iCloud, and the relatively minor watchOS 4.3.1 update.