I've used something like this: http://www.homedepot.com/p/CE-TECH-6-Port-Wall-Plate-White-5006-WH/202689886
You should be able to fit a cable through some of the holes and they offer flush covers for the unused holes (leaving little to no room for small toys). I used this to wire in some cat5e for internet and used an extra hole when satellite dish was installed and just passed it through to the satellite box (they also offer connections for coax, but I wasn't motivated to go get some).
I've also used the banana plug wall plates to route cable to my surround speakers and a second zone. It is nice to have the clean look (and easy hookup and disconnect) and sound quality wasn't as critical to those speakers. My amp is near my front speakers, so they are direct connect.
You should be able to fit a cable through some of the holes and they offer flush covers for the unused holes (leaving little to no room for small toys). I used this to wire in some cat5e for internet and used an extra hole when satellite dish was installed and just passed it through to the satellite box (they also offer connections for coax, but I wasn't motivated to go get some).
I've also used the banana plug wall plates to route cable to my surround speakers and a second zone. It is nice to have the clean look (and easy hookup and disconnect) and sound quality wasn't as critical to those speakers. My amp is near my front speakers, so they are direct connect.