Can I connect and old time capsule to a new airport extreme?

I use the old time capsule for back up and to stream music wirelessly. However, the music cuts in and out at times and is solid at other times. I suspect it is getting interference from neighboring wifi networks because I live in a town house and there are at least a half dozen networks in range. Can I buy an airport extreme and take advantage of it's dual band to stream the music on the 5 ghz band and connect the old time capsule to it and still use it for back up? I don't think I need a 2 tb drive and the old time capsule still works fine. I still have one or two b/g devices so I can't just switch the old time capsule to N only.


QA AirPort Extreme Base Station

QA AirPort Extreme Base Station

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