Need help with Apple Airport Express

Matt, AE is by default set to receive both 2.4GHz and 5GHz. I use Linksys as two separate networks with different names: 5GHz with MacMini and AE, 2.4GHz with other computers. I could set my MacMini to transmit both frequencies but couldn't find how to connect Linksys on both simultaneously. Perhaps giving networks the same name would do it? I ended up with separate 5GHz network for music but adding 2.4GHz should make it even more immune to dropouts.

Hello Mrvco,
Yes, I performed the setup for the AE to work wirelessly with the new Linksys router. It works for Internet radio, but is unable to access my iMac music library. Before I got the Linksys, the AE was connected wirelessly to the 2Wire gateway modem/router, and it was able to play both radio and media from my iMac. Can't figure this out. ...Matt

Matt, It is not that AE cannot see your music library, but perhaps program you use to transfer music (like Itunes) cannot see your library.

Kijanki, I will look into the 2.4 and 5 GHz issues you brought up. I am using Logitech Media Server to transfer music. This still works with my Squeezebox connected wirelessly to the Linksys ( both radio and library ).
Thanks for all your help. I will keep working on it and report back later. ..Matt

Wow. Really? This is one of the very easiest products to setup and have extend your network as you are describing.
But...it sounds like you are wanting this to do two different things.

1) You want to extend your network to your Marantz.
2) You want it to deliver your iTunes content into your Marantz.

Sounds like you have #1 licked now just use the simple iPad app (or iPhone) that let's you configure the AE. Once you see your AE on the app you can edit it to do both extend your entwork and also to act as a receiver for your iTunes library by simply going to the edit button on the top right and then looking down the list for AirPlay and making sure it is enabled then you can name it whatever you like so as not to get it confused with others you may have around your house.

THEN you need to either hookup an optical cable or you can atke that same output into a splitter and fo into an analog input on your receiver. The you go to iTunes and check AirPlay to that device and off you go.

OR...you can get something like Asset UPnP for your Mac or PC and have it access your iTunes library so you can play it through the media player that is in the Marantz.

Once this is setup you will experience very little or NO problems with it but you just need to be sure you have a good solid network and you dot your i's and cross your t's.
This is pretty much networking 101 and I find it odd that so many think of it as black art or something that screws up on a whim.

Do some homework at http://www.computeraudiophile.com/
and you should be in shape in no time at all.