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Question

Frustrated with Sonos Arc Ultra + Amp (Ceiling) setup in my apartment. Sounds worse as surrounds?

  • June 26, 2026
  • 1 reply
  • 4 views

Hey everyone,

 

I recently moved into a "luxury" apartment that came pre-wired with a Sonos Amp inside the utility closet, powering two passive ceiling speakers in the living room.

 

I just bought a Sonos Arc Ultra for the TV. Because of the layout, I managed to hardwire both the Arc and the Amp via Ethernet.

 

Here is my issue:

 

The "Default / Surround" Method (Sounds Terrible): If I set my Apple TV to default "Receiver Speakers" (so audio goes through the HDMI eARC port to the Arc) and use the Sonos app to bond the Amp/Ceiling speakers as Surrounds, the audio completely dies. The system sounds incredibly flat, dull, and completely neutered.

 

The "AirPlay" Method (Sounds Great, but a hassle): If I go into my Apple TV settings and manually route the audio via AirPlay to both the Arc Ultra and the Amp at the same time, the room fills with sound and it sounds incredible and punchy. (Note: In this AirPlay setup, the Sonos Arc and the Amp are kept as two completely separate systems/rooms in the Sonos app, not connected through surround sound). But doing this means the Apple TV remote won't control the volume properly, and it drops the connection every time the TV turns off.

 

My Current Setup: Right now, my best workaround is just using the Sonos Arc Ultra alone via HDMI as the default receiver speakers. It sounds good by itself, but it feels like a massive waste that I can't actually utilize the pre-installed ceiling speakers with the Amp without ruining the soundstage or dealing with AirPlay bugs.

 

I know ceiling speakers aren't "ideal" rear surrounds, but why does bonding them make the whole system sound so quiet compared to just grouping them?

 

Is there a hidden setting to make the Surround configuration sound as full and loud as the AirPlay group, or should I just keep them as two separate rooms in the app and group them manually?

 

Appreciate any advice from anyone who has dealt with these pre-wired apartment setups!

1 reply

Stanley_4
  • Grand Maestro
  • June 26, 2026

To simplify things stream a stereo (not Atmos) source on the Arc while the Amp is bonded for surrounds. Set the surround mode to Full instead of Ambient. Does the sound seem poor? If so try disconnecting one of the ceiling speakers and see how it sounds. If still weak swap the speaker connections at the Amp to change the phase of the surrounds. Try the same with the other channel. 

Some folks have had issues with the surround device wired to Ethernet as it disrupts the dedicated low latency Sonos creates for the device.

Also confirm you haven't made the error of using the "disable Wi-Fi" option, as that is not what it actually does, a long standing labeling issue Sonos hasn't seen fit to correct. It does disable your Wi-Fi but by disabling the internal radio needed for surrounds to connect properly. Think chopping off your arm to deal with a hangnail.