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rcjh8808
Contributor I
May 27, 2025
Answered

Sub, Arc Ultra, Amp Issue

I have a new Arc Ultra paired with an amp that has four in ceiling speakers and am also using a wired Polk Sub that I had.  Whenever I change the Arc to use “Surrounds” the sub woofer doesn’t work.  The only way I can get it all to work at the same time is to keep them separated and turn the volumes up for both.  That creates a bit of an odd echo though and isn’t really surround.  Any thoughts on what I’m doing wrong?

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jgatie
jgatieAnswer
May 27, 2025

Well that’s not cool.  LOL.  So how does someone use a Sono’s amp with an Arc Ultra and a 3rd party sub and four in ceiling speakers as a surround system then?

 

You cannot use a third party sub with a Sonos soundbar.  The only way to use a third party sub with Sonos in a Home Theater configuration is to use an Amp as front L/R connected to the TV via HDMI-ARC. 

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5 replies

buzz
buzz
Grand Maestro
May 27, 2025

AMP’s subwoofer output and line-In are disabled when AMP is used for surround.

rcjh8808Author
Contributor I
May 27, 2025

Well that’s not cool.  LOL.  So how does someone use a Sono’s amp with an Arc Ultra and a 3rd party sub and four in ceiling speakers as a surround system then?

jgatie
jgatieAnswer
May 27, 2025

Well that’s not cool.  LOL.  So how does someone use a Sono’s amp with an Arc Ultra and a 3rd party sub and four in ceiling speakers as a surround system then?

 

You cannot use a third party sub with a Sonos soundbar.  The only way to use a third party sub with Sonos in a Home Theater configuration is to use an Amp as front L/R connected to the TV via HDMI-ARC. 

    rcjh8808Author
    Contributor I
    May 27, 2025

    I have the Arc Ultra connected to the TV via the Arc connection.  I have the in ceiling speakers wired into the amp, I have the sub plugged into the amp as well via the sub input.  You are saying I can’t make this all work as a surround sound system?

    jgatie
    jgatie
    May 27, 2025

    I have the Arc Ultra connected to the TV via the Arc connection.  I have the in ceiling speakers wired into the amp, I have the sub plugged into the amp as well via the sub input.  You are saying I can’t make this all work as a surround sound system?

     

    That’s exactly what I’m saying.  The Arc Ultra has no subwoofer out, and the Amp’s subwoofer out is disabled when you use the Amp as surrounds.  

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