Play 5 - Hiss when not playing music

Hello to everyone. This is my first post. I have recenly added a Play 5 Speaker to my setup. I also have a Play 3, Connect and Bridge.

Last night I noticed a quiet hiss coming from my Play 5. The unit had not been playing anything for a few hours. On hearing this I went to my Play 3 which is totally silent.

Have I got a faulty unit or is this noise normal. You do have to have your head quite close to the speaker to hear it.

Thanks

Although a very quiet sound is normal, it should not be happenng after a few minutes of downtime. Do you have a line-in attached to the unit, and is the source for the line-in constantly playing? Because as active line-in will cause the unit to stay on, reagardless if it is playing that line-in source.

I have nothing attached to the line in and it is connected via wireless. The unit plays fine but the hiss is always there once it stops playing, even after a few minutes. The only time it stops is when I unplug it. when I plug it back in it starts again.

Hello,

Unfortunately, I think the hiss coming from your Play:5 is normal. I also have it and I remember there being a thread about it a while back. I used to have the Play:5 in the bedroom, but then switched it to the living room, because the hiss would be audible during the night. If I remember correctly, the hiss is coming from a transformer in the unit and you can localize the source of the hiss coming from the back of the Play:5. I think some get lucky and have only a very minimal hiss, while others have it a bit louder (might also be due to subjective perception of the hiss).

I think for a speaker in this price range this is a flaw that should not be present. On the other hand, this is just about the only complaint about the Sonos system that I have and meanwhile I don't even hear the hiss anymore.

EDIT: As you can read in the two following posts, I may have been wrong about the hiss being normal, but it is certainly not a rare case. Best is to contact support as suggested by BigN and ratty.

No hiss at all from either of mine when they're sleeping. So I would not accept it as "normal". Contact Sonos Support to see what they have to say about it.

Just to be absolutely clear:

The Play:5 emits a very slight hiss from its speakers for a minute or so after play stops. This is straightforward low level noise from the amplifiers. It ceases when the amplifiers automatically shut down.

A continuous mechanical hiss/whistle from the internal power supply is not normal. Sonos Support should be consulted with a view to replacing the unit.

I called SONOS yesterday about a whistle coming through my Play:5 when plugged in. It is always a noticeable sound, whether I am playing music or silent. My speaker is less than 4 years old. I was told it is a known issue with Play:5 speakers that are out of warranty, and was offered a 30% discount off a new Play:5 Gen 2. I can’t spend that kind of money to replace OR repair, so now I am left with a VERY expensive piece of electronic waste. Who would buy a SONOS speaker with a whistle? Nobody!