Sonos Amp and 3rd party subwoofer issue.

  • 11 February 2019
  • 85 replies
  • 19016 views

Userlevel 1
Hi!

I am having issues connecting my Sonos Amp (Black) to my Klipsch SW-311 10-Inch Subwoofer (or vice-versa). I currently have two Klipsch speakers and the Klipsch Subwoofer connected to the Sonos Amp. Both speakers play but I am getting no sound from the subwoofer. The subwoofer is connected to the sub port on the Sonos Amp and the LFE port on the sub. The sub plays when connected to my Yamaha system but doesn't play when connected to the Sonos Amp.

Is my sub's connection wrong? Will a sub with a built-in amp not work with the Sonos Amp? What am I doing wrong?

Help please...




Jale01

85 replies

Mine is working properly now.  I had forgotten about the issue and was using my setup in the room with the AMP and noticed way too much subwoofer volume.  At first I thought it was where I was sitting so I moved and it was still incredibly high.  I went into the settings and adjusted it down to around +5 and it could still use a bit more adjustment.  I remembered this thread and came back to see if there was an update.  Glad to see this issue resolved.

I can confirm this as well - the latest update to version 11.1 seems to have solved the sub output level problem with the Amp. I’m not sure why this went unacknowledged so long, nor do I understand why the fix went out so quietly. Regardless, the Amp now seems to be functioning up to the high standards of the other Sonos devices. A big thank you to whomever was able to identify and resolve the software issue!

Userlevel 7
Badge +26

Hi everyone, we’ve been working on this issue and the most recent Sonos update, version 11.1, should have resolved any low sub output issues that you were seeing. If you haven’t updated already, you may notice that the sub level is much higher after the update, needing it to be turned down. Once you’ve got your sub output tuned in again, you should be all set to enjoy.

Have a good one!

Badge +1

2 hours of TV later - no turn off!

 

I've halved the gain on the sub, and increased back to about +8 on the app. Keeps the sub alive. 

 

 

Puuurfect. 

 

Means I can now spend money on some new KEF LS50s to go with my Amp!

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Your mileage may vary but the bug seems fixed on the latest firmware 11.1.

 

I had to turn the in-app sub level down from +14 to +2 :heart_eyes:

Me too!
 

I'm not sure yet if it has fixed the “auto-sleep” issue with my sub. But it's definitely fixed the gain issue! It's very loud now!! I've got from +15 to +3, and may go down further yet!

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Your mileage may vary but the bug seems fixed on the latest firmware 11.1.

 

I had to turn the in-app sub level down from +14 to +2 :heart_eyes:

Same issue here - weak signal from the Sonos Amp’s subwoofer output makes it basically useless. I have to set the Sonos Amp to +15 and turn the sub’s amp all the way up to get audible sound from the sub. When I use this exact same sub setup with other sources it literally shakes the house with the sub level at 1/4. There are lots of threads and discussions about this; I find it infuriating that Sonos won’t at least acknowledge the issue. It’s also disappointing the product has such an obvious flaw when all the other Sonos stuff I’ve had has been quite good. I really wish I had come across these discussions before I purchased the Amp so I could have avoided it.

Is there going to be any valid responses from SONOS in regards to this? I find this type of customer service to be deceptive from a technology company.

I've read that the sub out is only 2 volts (personally I feel it's outdated voltage coming from a car audio guy) , but I would think that is plenty for 90% of the powered subs on the market.

I am looking at purchasing the Sonos Outdoor set with Sonos Amp to start my Sonos journey, but this doesn't appear to be a positive start. I would go to Best Buy and have them connect it all in store, but with Covid closures, that cannot happen anytime soon.

Userlevel 2

What is the status of this? I am looking at using the Sonos Amp with either a Rythmik or SVS subwoofer. Does the subwoofer out provide a high enough signal level to drive subwoofers like these?

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They have helpfully concluded that it is the fault of my sub, despite my sub working perfectly with my previous setup of a Sonos Connect into a hifi amp. Whenever that amp turned on the sub was instantly on. Why can't the Sonos Amp do this even with it set to +15?

 

They have an issue. But they won't admit it. 

Same issue with my sub and the just bought Sonos amp. Reading this thread makes me wonder if it works with any sub apart from their own brand one.

Badge +1

Hi everyone, thanks for sharing your experiences with different devices and the Sonos Amp. We’re always interested in seeing what you have to say, and are eager to investigate any issues that might come up. Our engineering team has been looking into this issue and would love some more information. Currently, there isn't a major trend that has been identified, but they'd like to see some more cases where subwoofers and the Amp aren’t behaving as expected. 


If you’re having trouble with the Amp outputting low or no audio to a subwoofer and haven’t worked with our support team yet, please feel free to reach out to us using the contact details here. The support team will help sort out issues where possible, and if needed, they’ll gather the right information and get it up to the engineering teams for investigation.

 

Hi Ryan and others,

 

I have been following this thread with interest.

I have replaced an old Onkyo amp and Sonos Connect, running an Onkyo SKW-501 active Subwoofer with the new Sonos Amp. 

Similar to others I have to have my subwoofer output set to +15 to get a reasonable signal. This in itself is not a problem the majority of the time.

The thing that IS annoying is that the Amp does not trigger the subwoofer to wake from standby whenever it is active. For example I am currently watching the News on TV and the subwoofer is in standby mode. When a bass note plays the subwoofer will kick in but usually with a ~1s delay which is noticeable. When watching a Film/playing a Game this is rarely an issue as there are enough bass notes that the subwoofer wakes from standby and stays on, otherwise after about 15 minutes it returns to standby. There is unfortunately no switch to disable standby mode on the subwoofer. The Onkyo FAQ recommends increasing the output from the Amp, but unfortunately as already at +15 this is not possible. When the sub was running from the Onkyo amp, the second the amp turned on the sub would come on and stay on.

 

Clearly this is an issue with the Sonos amp outputting a very low subwoofer pre-out signal.

 

I spoke to Enos at Customer Support and submitted a diagnostic (403792976). I referenced this article. He could not see a fault with the Amp and suggested this was an issue with the Onkyo Sub standby circuitry being “overly sensitive”. Although this may be true, it’s clearly not an ideal situation, and although the plan will be to upgrade the sub in the future that is not feasible right now (the Amp is expensive!). 

He did say he would pass my experience onto your Engineers.

 

Hopefully if enough people report such an issue a solution will be found.

 

Thanks,

 

Oliver

 

Hey Ryan S,

 

Don’t the comments here warrant a closer look at these connections?  Do you really need more people to report in order to escalate the issue?  You can count me in as one of the many people who are experiencing little to no output from our 3rd party amps.  When I put my hand to my amp with it cranked (both in the amp settings and physically on my subwoofer), I can barely feel a vibration.  Also, hasn’t Sonos tested this themselves?  Sounds like it would be a really easy test to perform: drag in a third party sub, plut it in to sonos, and voila, problem recreated.

 

Any help would be greatly appreciated (especially considering that I dropped $600 on this product)!

I’ll be in the same situation - has anyone used a sub that has just a single input with the AMP - I’ll end up with two subs so I’ll have to split the sub out which sounds like it will be a problem.

I purchased my Sonos Amp last weekend to connect to a Sony TV, 2 x B+W bookshelves and a B+W ASW610 sub. I read various posts to work out how to connect the sub and initially tried connecting via a split RCA. This gave me a weak, or non existent signal as described in a lot of posts in this thread. I was freaking out a bit. After reading about LFE channels, and re-reading my sub manual, I connected a single RCA from the amp to the left RCA input on the sub, which I think is the LFE input, and I switched off the low pass filter. It now works well in a surround set-up and puts out a lot of bass. I’m really enjoying the amp. The TV and Spotify sound great to me and I like the look of the amp. The app is really useful and I’ve found myself adjusting the sub level with the app which is really handy.

Just to provide some hope for people. I have the new Amp connected to an Energy sub and Mirage speakers. I’m not using it for TV. It’s all playing perfectly and the subwoofer is powering just fine.

I will say the line level is low and I had to the sub volume knob to about 75% and it’s all the way up in the Amp settings. 

It sounded good playing lighter rock music like Gin Blossoms and thumped when I put on In Da Club by fifty cent.

I've just submitted my ticket to support as well.  Hopefully there's an answer soon.  I'll update here if I get anything tangible.

Userlevel 6
Badge +5

I am having the exact same issue as others have reported with a REL T/7i sub. No output at all from sub out on AMP. This sub works perfectly on another system. Diagnostic code is 1376304507. I took advantage of your upgrade offer and will have to return the AMP if it does not work with my third party sub. This seems like a serious design flaw. 

Hey, in order to get sound I need to turn the volume control on my sub way up, as well as turn the sub volume on the amp settings page in the Sonos app to +13. Just thought I would mention this in case you haven't tried both of these.  

Userlevel 2

I am having the exact same issue as others have reported with a REL T/7i sub. No output at all from sub out on AMP. This sub works perfectly on another system. Diagnostic code is 1376304507. I took advantage of your upgrade offer and will have to return the AMP if it does not work with my third party sub. This seems like a serious design flaw. 

Userlevel 2
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Hi everyone, thanks for sharing your experiences with different devices and the Sonos Amp. We’re always interested in seeing what you have to say, and are eager to investigate any issues that might come up. Our engineering team has been looking into this issue and would love some more information. Currently, there isn't a major trend that has been identified, but they'd like to see some more cases where subwoofers and the Amp aren’t behaving as expected. 


If you’re having trouble with the Amp outputting low or no audio to a subwoofer and haven’t worked with our support team yet, please feel free to reach out to us using the contact details here. The support team will help sort out issues where possible, and if needed, they’ll gather the right information and get it up to the engineering teams for investigation.

 

Ryan - I appreciate your input. Is there a case number or something that we should reference when we call in? I spoke with CS at length at this issue a few days ago and was told that they “have never heard of this issue.” Given that this thread has 10K+ views and hundreds of users with the exact same issue, that was frustrating. Please let us know what we can do to facilitate a resolution to this issue.

 

Userlevel 7
Badge +26

Hi everyone, thanks for sharing your experiences with different devices and the Sonos Amp. We’re always interested in seeing what you have to say, and are eager to investigate any issues that might come up. Our engineering team has been looking into this issue and would love some more information. Currently, there isn't a major trend that has been identified, but they'd like to see some more cases where subwoofers and the Amp aren’t behaving as expected. 


If you’re having trouble with the Amp outputting low or no audio to a subwoofer and haven’t worked with our support team yet, please feel free to reach out to us using the contact details here. The support team will help sort out issues where possible, and if needed, they’ll gather the right information and get it up to the engineering teams for investigation.

AWHS has it right about what to do with setting up your 3rd party sub. I have the Martin Logan Dynamo Sub 1600X with the Martin Logan Wireless kit connected to the Sub Out of the Sonos Amp. I also own Sonos Connect Amps (which were easier to set up with a 3rd party Sub). With the Sonos Amp I also drive a pair of Paradigm Studio 60 v3 tower speakers.

So yes, go to the Sonos Settings and add sub, stay away from the Sonos Subwoofer settings. This section should be a little more clear.

You may be best to have your 3rd party sub always on as opposed to standby. With the Sonos settings have the sub level up high and adjust other settings according to your sub manual and cater to your room size and placement. Sub adjustments can be a science. Note : The Martin Logan Dynamo Sub has an app to fine tune it’s settings from your couch via Bluetooth. No need to adjust the manual controls on their latest higher end subs.

As for the Sonos Sub, it is not over priced for what it does. It’s impressive, I use one in another zone with a Sonos Connect Amp. But it’s no match for the Martin Logan Dynamo 1600 :)

I got a sub working with my system.

I did not make any changes in my Sonos app and system settings except in the EQ to get the amount of low end I wanted. It kicks whether it’s flat or with the EQ boosted five points, which is my preference.   

The one I tried initially, the Sonos Connect Amp was either not pushing enough gain to trip the amp on or the sub was defective. So since my Martin Logan wireless transmitter has a Left and Right input for my Home Theater sub, I pulled out the right that connected to my Sony amp and used that channel for my Sonos Connect amp (subs are mono anyway so left and right in is pointless), and now I use the same sub for both my Sony entertainment system and for my Sonos zone in the kitchen (it’s one big room anyway). Problem solved for me! The ML wireless transmitter is its own preamp anyway so I don’t have to send a stronger signal to kick on the speaker since it’s wireless. 

The sub is a Cerwin Vega HT-S10A. So far phone support has tried running diagnostics, says the Amp detects the sub connection, and has gone round and round telling me to turn up the volume (because i turned it down… because I’m on the phone… to phone support 🤦

 

[edit] getting similar run around, unplug it, plug it back in. “oh it’s the sub's fault”, because perfectly functioning analog device knows to stop working just to mess with Sonos. 

 

“the problem is not with the Amp, everything looks fine from this end”

I don’t know the 3rd party sub you refer to, but presumably Sonos Support were referring to turning up the volume on the sub itself? I know their ‘classic series’ subs support that.

http://www.cerwinvega.com/manuals/home/Classic-Sub_manual.pdf

The sub is a Cerwin Vega HT-S10A. So far phone support has tried running diagnostics, says the Amp detects the sub connection, and has gone round and round telling me to turn up the volume (because i turned it down… because I’m on the phone… to phone support 🤦

 

[edit] getting similar run around, unplug it, plug it back in. “oh it’s the sub's fault”, because perfectly functioning analog device knows to stop working just to mess with Sonos. 

 

“the problem is not with the Amp, everything looks fine from this end”

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