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Is There A Single or Multiple Fixed Output Levels for Sonos Connect (S1)?

  • December 22, 2025
  • 3 replies
  • 43 views

bclarkeva
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I had been using the line-out RCA jacks of my S1 Sonos Connect (using fixed output setting) to drive into Tape 1 input jacks of a Luxman receiver, and all worked well. After a long hiatus (since last Christmas), I tried to send Christmas music from Sonos to the Luxman, and can barely hear the music - its coming across at a very low level, so much that turning the receiver volume up to 9 I can hear that the source is playing but I can’t hear it to listen to it.

I’m wondering if there is someplace where I’ve accidentally specified “low level” when I need to get medium or high level signal out of the Sonos Connect? BTW, to test, I switched from the Tape 1 input on the receiver to the Tuner and the volume level was MUCH HIGHER.

Anyone have any ideas on what I should do to get a higher level signal over to the receiver?

Thanks, and Happy Holidays!

Bob Clarke

Falls Church, VA

Best answer by Jamie A

Hi ​@bclarkeva, welcome to the Sonos Community!

I’m sorry to hear that the music is very quiet when playing to your Connect.

I don’t think it would be something you’ve accidentally pressed but I’m not sure why it would have changed if it was fine before. If you go into your system, you can adjust the Line-In settings, specifically Source Level is what you’d want to adjust if the audio is quiet. You can do this by following these steps on the Sonos app:

Sonos App:

  1. Go to the Settings menu and select the appropriate Room.
  2. Various Line-in settings can be found under Line-In.

Sonos S1 Controller

  1. From the Settings tab, select System.
  2. Under Products, choose your product that has a Line-in connection.
  3. Adjust your settings under the Line-in section.

Our support article for adjusting Line-In settings also has these steps and explains what each setting does.

I hope this information helps!

3 replies

Jamie A
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  • Sonos Staff
  • Answer
  • December 23, 2025

Hi ​@bclarkeva, welcome to the Sonos Community!

I’m sorry to hear that the music is very quiet when playing to your Connect.

I don’t think it would be something you’ve accidentally pressed but I’m not sure why it would have changed if it was fine before. If you go into your system, you can adjust the Line-In settings, specifically Source Level is what you’d want to adjust if the audio is quiet. You can do this by following these steps on the Sonos app:

Sonos App:

  1. Go to the Settings menu and select the appropriate Room.
  2. Various Line-in settings can be found under Line-In.

Sonos S1 Controller

  1. From the Settings tab, select System.
  2. Under Products, choose your product that has a Line-in connection.
  3. Adjust your settings under the Line-in section.

Our support article for adjusting Line-In settings also has these steps and explains what each setting does.

I hope this information helps!


bclarkeva
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  • Author
  • Contributor II
  • February 1, 2026

Thank you for your response, but my issue was not corrected, partly because you misinterpreted my situation:

  1. I am connected by Wifi to the router to the NAS with music files
  2. I am connected by Line Out on Sonos Connect (V1) to Tape In on my receiver
  3. I have selected Fixed Volume on the Sonos App under the Line Out connection
  4. I can hear the music files as I select them, but at extremely reduced volume. I have moved the cable to other inputs on the receiver (Tape 2, Aux) and get the same situation.
  5. Somehow, the Sonos Connect seems to be outputting a very low-level signal, and I cannot find a way to increase the signal level high enough that I can use the volume control on the receiver to control it.

Hopefully, with this description, you (Sonos) will be able to further diagnose my problem. As you can see from my records, I’ve had and been happy with my Sonos system for many years so I’m looking forward to getting this resolved.

Thank you for your help on this,

Bob Clarke


Airgetlam
  • February 1, 2026

Have you submitted a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it? It’s possible there could be an issue with the electronics in your CONNECT which could be faulty, given your experience. 

Just out of curiosity, what does V1 mean in your post? While the data in a diagnostic would likely help, we in the public don’t have access to that data. Are you implying it is running S1 as an operating system, and is a first generation CONNECT?

Just as a note, the only Sonos employees that respond in this public use forum are Sonos moderators, if you want to speak with Sonos Support , you need to call them.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.