To play back CD quality audio needs around 20 mbps, assuming the connection is solid, and no one else is using the available bandwidth.
Any more than that and you won't have the bandwidth.
50 mbps sounds very low however. Check his signal for strength and contention. Android/Apple and laptops have apps available which let you check this. Routers tend to not do a very good job of spreading themselves out, so if you find open channels and can move his channel you can see great improvements.
If the problem is simply that the router is too far and he can't improve this, then I suggest a mesh style router like this one:
https://amzn.to/3oBcDkz
Another way in which a modern router can help is that 5 GHz signals may suffer less contention. Depends where you are, but right here, I have 20 or something 2 GHz wifi signals around me and ZERO other 5 GHz signals.
Any more than that and you won't have the bandwidth.
50 mbps sounds very low however. Check his signal for strength and contention. Android/Apple and laptops have apps available which let you check this. Routers tend to not do a very good job of spreading themselves out, so if you find open channels and can move his channel you can see great improvements.
If the problem is simply that the router is too far and he can't improve this, then I suggest a mesh style router like this one:
https://amzn.to/3oBcDkz
Another way in which a modern router can help is that 5 GHz signals may suffer less contention. Depends where you are, but right here, I have 20 or something 2 GHz wifi signals around me and ZERO other 5 GHz signals.