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SarahN
Local Superstar
June 20, 2022

Is it worth picking a fixed 5ghz channel?

Hi,

I have a BT Smart Hub 2 and I’m in the UK. I downloaded the Wi-Fi analyzer Android app to check for the best 2.4ghz channel to set my router to. I have noticed on it though, that under the 5ghz tab, myself and pretty much everyone around me is set to channel 36 (my Router has this one set under it’s auto smart setting unlike the 2.4 where it had a manual channel selected).

When I then do diagnostic on the app it tells me everything is fine apart from the 5ghz channel where it is reporting interference : 90% and recommends another channel - 38 through to 44. I know I would have to turn off the smart function to set this in my router otherwise it will just revert back to channel 36.

Is there a reason BT would have set the Hub in that way for the 5ghz channel and should I leave it alone? Or would picking a fixed one that isn’t used nearby be a good thing to do?

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32 replies

ratty
June 20, 2022

Are you experiencing any problems? Or loss of bandwidth? If not I’d leave it to manage itself.

In my experience the ‘90%’ type of figure is pretty arbitrary, and probably depends only on the number of SSIDs the scanner can see. So it wouldn’t necessarily take account of the signal strengths (5GHz has significantly less range/penetration than 2.4GHz) or actual channel occupancy (traffic density).

In any case AC (WiFi 5) is 80MHz wide -- covering channels 36-48 -- and determines when and how to transmit on a per packet basis, so it’ll coexist with multiple other users of the channel.

June 20, 2022

Hi @SarahN .  Are you having problems that you are hoping this might resolve?  If not, i would leave well alone.  You have a Boost, and so i assume you are running SonosNet, which is a 2.4GHz network, so none of your devices will be using 5GHz to connect directly to your LAN.

If you have surrounds or Subs connecting  to Sonos HT systems then they will be communicating over a 5GHz direct routing and won’t use the 5GHz connection from your router.  The Sonos 5GHz channel is chosen to minimise interference with the environmental channels.

SarahN
SarahNAuthor
Local Superstar
June 20, 2022

Hi @ratty - I have good speeds on things that are connected to 5ghz so it is probably ok to leave it as it is.

The only slight issue I sometimes have is one of my Fives (part of a stereo pair), stopping playing. It doesn’t happen all the time and the way to resolve it is to unplug them both and let them re-boot. Then they seem fine again. There isn’t anything near them that could be affecting them and they are on SonosNet via a Boost. When this happens the Five that stops playing still shows up in the app as if nothing is wrong. With them being on SonosNet, would this router thing be a non issue?

I don’t fully understand it all to be honest. On my 2.4ghz, I have picked a channel (1) on my router which my immediate neighbour does not use (they are on 11), and I have set the Sonos app to channel 6.

Can you have too many Sonos speakers? 🤔 😆
SarahN
SarahNAuthor
Local Superstar
June 20, 2022

@John B  - you may have just answered some of my points above lol

Can you have too many Sonos speakers? 🤔 😆
June 20, 2022

On the 2.4Ghz channel, is your channel width set to 20MHz?  This is to be preferred over Auto or 40MHz.

SarahN
SarahNAuthor
Local Superstar
June 20, 2022

@John B - yes it is according to that app. I don’t think my BT router tells me that! At least I cannot see where it would even under the advanced settings.

Can you have too many Sonos speakers? 🤔 😆
June 20, 2022

@John B - yes it is according to that app. I don’t think my BT router tells me that! At least I cannot see where it would even under the advanced settings.

That’s OK then… although neighbouring wifi might be using the wider band (I expect your analyser would show this).  Is your Boost very close to your router?  A distance of at least a couple of feet is recommended.

SarahN
SarahNAuthor
Local Superstar
June 20, 2022

The Boost is about a meter from the Router as I knew that was the best thing to do. I do have a bit of an odd set up at home mind you. It’s a newish house (5 years old) with fiber to the property fitted when it was built. The engineers/builders put the bits and bobs in the under stairs cupboard so the router has to live there and the boost is wall mounted a meter from it. I just sometimes wonder if all the stuff in that cupboard could cause it’s own issues?

I do get good speeds though and if I stand with the door open, and do a speed test on my phone, it does not give any faster speeds than if I’m away from the cupboard with it’s door closed.

Can you have too many Sonos speakers? 🤔 😆
SarahN
SarahNAuthor
Local Superstar
June 20, 2022

Oh and if I do that matrix thingy, all the boxes in the main bit are all green so that’s all ok too

Can you have too many Sonos speakers? 🤔 😆
ratty
June 20, 2022

One thing to try with the Five pair is to reverse the pairing process:

Unpair them, then starting from the settings for the right-hand unit/room pair them together again. You should be offered the left unit/room in the pop-up. You’d then get to nominate which is which for stereo purposes.

In the room settings for the combined pair you should then see the products listed as Five (Right) followed by Five (Left). This means the Group Coordinator for the pair is the right unit.

(If you did all this the first time round, then instead pair starting from the left-hand unit.)