Guest Network access to airplay speakers?

[SHNXX]

I have a network with three Apple routers - two time capsules (extremes) and an airport express connected via powerline ethernet adapters.

The airport express is set up only for the purpose of connecting them to speakers (it's connected to an amp which is connected to speakers).

There are two networks: guest and home.

Is there any way to make the airplay speakers available for guest only instead of home?

 

[priitv8]

AFAIK, you need to make it the wireless client of the Guest WLAN. There is no wired guest network on AirPorts.