Home Assistant AUX-2 hands-on reveals multiroom audio trade-offs

A whole-home music system can stay in time and still make you wait. In a November 12 SSPAI review after several weeks with Home Assistant Connect AUX-2, writer 南桥北桥不是桥 reported hours of aligned playback, but delays when starting music or changing groups. Wi-Fi FLAC playback could stutter. The reviewer also built a Grove LCD track-information display. That combination is revealing: the attraction is both listening and tinkering, with convenience arriving unevenly.

For someone with an older stereo, the obvious question is why working speakers should need replacing to acquire network features. Nabu Casa launched AUX-2 on November 11 at $69 or €59, with Power over Ethernet allowing one network cable to carry data and electricity. The approach separates the upgrade from the equipment that actually makes the sound. Instead of evaluating an entirely new stereo, an owner can consider what is missing from the existing setup. That changes the size of the purchasing decision, even though it does not eliminate setup work.

The official specifications require Home Assistant 2026.9 or later. AUX-2 provides analog or optical output through a 3.5mm connection, without amplification, audio input, or Bluetooth audio. Music Assistant can group it with AirPlay and some Sonos speakers. Those boundaries matter more than the number of sockets on the case: prospective owners need the right equipment and a willingness to run the software. A familiar-looking connector should not be mistaken for a promise that every possible connection will work.

Sendspin, the open protocol behind the coordinated playback, remains at Release Candidate 1 while its specification is finalized. Imagine musicians rehearsing in separate rooms: giving everyone the same sheet music is only part of the task; they also need a shared sense of when to play. The system also carries track information and controls, allowing displays and sound-producing devices to take different roles. The interesting design choice is to treat the room as cooperating parts rather than insisting that one branded object do everything.

This makes the strongest case for households that already enjoy maintaining a smart-home system. For others, configuration time belongs in the price comparison alongside hardware. Reusing a favorite amplifier is attractive, but everyday operations still determine whether the arrangement feels convenient. The broader possibility is a home audio system whose network connection, controls, and speakers can evolve separately, instead of making the useful lifetime of all three depend on the same replacement cycle.

Original source published: SSPAI, November 12, 2026; official launch announcement, November 11, 2026.