Trending Lyricist I

Sonos AMP Sub Output

Forum|Forum|2 years ago
August 30, 2024
16 replies
1077 views

I'm just going to keep posting about this until I get a fix or Sonos acknowledges the damn bug!

I have 3 sonos amps, and a powered sub. Connecting to the sub output on the amp works, but very quietly. I have to push the subs' gain up to full to get any output! Critically, the app doesn't show the sub controls when a sub is plugged in. At all. I've tried all 3 amps with the sub, all exhibit the same issue.

Anyone else seen this? And is sonos even going to acknowledge it? Or will we see another pair of damn headphones before they do?

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K

Kumar

Off the top of my head, even ignoring the lack of sub controls in the app, I would expect the crossover to be applied by the amp, which I think used to default at 80Hz with the Sonos sub so you should definitely get some bass.

Very odd “defect” for the quoted reason; What happens in the app for the Sonos Amp if the RCA wire is plugged only into the Sonos amp, and not connected at the other end to the Sub? A dead end probably, this trouble shooting step, but no harm in trying.

Another experiment - with the wire still not connected to the Sub, if you pull/insert one end of the RCA cable into the Sub out jack of the Amp while bass heavy music is playing, do you hear the bass go missing in the main speakers when the cable is inserted into the Sub out on the Amp? And reappear there after you pull it out?

F

faintaxisAuthor

Trending Lyricist I

Off the top of my head, even ignoring the lack of sub controls in the app, I would expect the crossover to be applied by the amp, which I think used to default at 80Hz with the Sonos sub so you should definitely get some bass.

Very odd “defect” for the quoted reason; What happens in the app for the Sonos Amp if the RCA wire is plugged only into the Sonos amp, and not connected at the other end to the Sub? A dead end probably, this trouble shooting step, but no harm in trying.

Another experiment - with the wire still not connected to the Sub, if you pull/insert one end of the RCA cable into the Sub out jack of the Amp while bass heavy music is playing, do you hear the bass go missing in the main speakers when the cable is inserted into the Sub out on the Amp? And reappear there after you pull it out?

I have tried just plugging the cable in to the amp (with nothing at the other end), you're right in that it should still trigger the options but alas it doesn't.

So, plugging in the cable - this is where it gets a little strange. The speakers will quieten down and the amp will adjust their crossover - however, a few milliseconds later, they go back to full range. Also happens with the subs connected.

sigh

Prodigy II

Off the top of my head, even ignoring the lack of sub controls in the app, I would expect the crossover to be applied by the amp, which I think used to default at 80Hz with the Sonos sub so you should definitely get some bass.

Very odd “defect” for the quoted reason; What happens in the app for the Sonos Amp if the RCA wire is plugged only into the Sonos amp, and not connected at the other end to the Sub? A dead end probably, this trouble shooting step, but no harm in trying.

Another experiment - with the wire still not connected to the Sub, if you pull/insert one end of the RCA cable into the Sub out jack of the Amp while bass heavy music is playing, do you hear the bass go missing in the main speakers when the cable is inserted into the Sub out on the Amp? And reappear there after you pull it out?

I have tried just plugging the cable in to the amp (with nothing at the other end), you're right in that it should still trigger the options but alas it doesn't.

So, plugging in the cable - this is where it gets a little strange. The speakers will quieten down and the amp will adjust their crossover - however, a few milliseconds later, they go back to full range. Also happens with the subs connected.

That sounds like the auto detect works, changes some settings, but then for some reason undoes them.

Loose fitting rca connectors are a thing, but I think you’d need to be very unlucky to have multiple cables and none of them work just with the Amps. 😀

Maybe someone with an Amp and non Sonos sub connected via rca will see the thread and can provide details of how their system is behaving.

I don’t know how many times you’ve called and discussed it with them, but maybe another call to Sonos support with a diagnostic might get a different outcome.

buzz

I suggest that you capture this behavior in a diagnostic and report to support again.

Perhaps @Corry P can escalate.

K

Kumar

So, plugging in the cable - this is where it gets a little strange. The speakers will quieten down and the amp will adjust their crossover - however, a few milliseconds later, they go back to full range. Also happens with the subs connected.

Interesting and I would be curious to know what the issue was once it gets identified and hopefully resolved. Since all three amps are doing this, it cannot be a hardware defect.

F

faintaxisAuthor

Trending Lyricist I

I've got my hands on a newer generation amp and can confirm that the sub outputs work on it, so basically the sub outputs on the S2 "grey/white" amps are broken due to the software update.

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