Sonos Amp and 3rd party subwoofer issue

So, i have noticed a few things here:

I fort got AMP when it came out, the version of IOS app allowed me to get granular and adjust sub. Perhaps the engineers need to go back and look at that version.  I also when i installed the AMP when it first came out, i was using a Polk SW10, worked great, lots of bass, actually had to turn it down.  I recently got a Klipsch 12 sub, hooked it up nothing, reset AMP, got nothing.  Hooked up Polk and did a reset as well, nothing.  Something with the newer app versions seem to be causing issues with sub out.

The also stark reality, is that you should NOT be adjusting to +15, as it will lead to blowing something out if you have it turned up.  With things at 0, if anything, by default, this AMP SHOULD only need minor adjustments, not a +15 just to get things working.  

I truly hope they get this figured out.

I’m a Sonos noob ready to buy a Sonos amp to replace my old home theatre receiver but the wired subwoofer issue here is keeping me from purchasing. I have a good powered subwoofer I like and see no reason to have to buy a new $700 wireless Sonos one. I want to use the amp, 2 bookshelf speakers (with center channel emulation) and my sub which is easily wired to the amp. I’m not using any surround speakers, I have them now and have decide to give them up and the center channel too to keep things simple and clean. I don’t watch a ton of action movies, more likely to listen to music. 
 

So, does the powered subwoofer output work or not? I’m not buying it unless it does. 

I currently have 4 Sonos Amps that I’ve being using for the past 2 months with out any subs. Yesterday I got my SVS Ultra PB16 and for a good 3 hours I couldn’t get it to work, I thought I had a defective Sub, but after being on the phone with SVS support and messing with the Sonos App we came to the conclusion that the signal is way too weak, I was able to get a bit of base by cracking the level to +15 and setting the Sub to Max volume, which it sucks. We actually tested the sub with my Ipad by using RCA to Headphone Jack in the Ipad and its sounds amazing so this confirms the sub is fine. Unfortunately I can’t return my Amps and I dont want to return my sub, so what Im thinking of doing is buying a Yamaha receiver to power my In-ceiling speakers and sub for a true Surround system and control it with a Sonos Port.

Oh and by the way, if You have a Sonos Sound Bar and you want to create a 7.1 system, it wont let you, this is another reason as to why Im considering getting a Yamaha Receiver since Sonos is not all there yet.

Given that this issue is so easy to reproduce It is very frustrating that Sonos has yet to resolve (or even acknowledge it). 

The latter bothers me more and tells me to steer clear of the amp.

Just got my Sonos Amp and having same issue -- no output from powered sub that works fine. There seems to be no real resolution form Sonos on this issue.

I’m waiting on delivery of the upgraded speakers I was planning to use (including a matching powered subwoofer) and will see if this is resolved or if the new setup is acceptable without a sub (assuming nothing is magically resolved with new subwoofer)

Played around with this setup a bit more and changed the Sonos settings to max (Bass +10, Sub Level +15), and tweaked the sub crossover and volume to what should be a scary level of bass and I *am* getting *something* out of the subwoofer, but I’m not impressed so far

Yeah - it seems that the subwoofer output is miscalibrated. I hope that it is a software issue, and not a hardware issue (like a lack of voltage to that jack). 

I sure wish Sonos would pop by this thread and give us an update

Bump - this was a key reason i bought the AMP and investsed in this eco system in the first place and the fact it doesn’t work as expected and lack of response is VERY disappointing.

Could we PLEASE get somebody from Sonos to communicate with us exactly what needs to happen to have this working as advertised? I’ve tried everything in this thread (disabled surrounds etc.) and no luck with my Yamaha powered sub which was fine with every other receiver / source i plug it into.

I suspect they realise this is a critical issue with no resolution right now which is concerning :|

I’m connected to several hifi retailers and reviewers here - i will be communicating this issue openly to anybody even considering going down this route. Right now, you should NOT should consider buying the AMP if you have any interest in running 3rd party subs right now.

Which sub is it exactly (model no.) and have you telephoned Sonos Customer Care about the issue? What did they say?