Can anyone suggest a suitable component for sending balanced audio over CAT5E.

I wish to take the line level ouput of a pre-amp (6 channel) and send it balanced over CAT5E to a power amp located in the roof of the house (approx 200Ft away).

I may also wish to send a further 4 channels to an AV receiver located about 100Ft away.
Any suggestions would be greatly appreciated as so far

I have only found devices which send both audio and video (which I don't require) to a receiver. An audio only device with several line level inputs would be ideal.

Thanks in advance for your help.