Buzzing with home network system

[systemseiko]

I have installed a home audio system with 8 speakers wired direct to a data center, these are hard wired into a modular face plate with RCA connections.
The amplifier i am using is a Teac AG980 multi zone, i have a desktop connected via headphone jack & ground loop isolator to AUX source, my problem exists only when playing audio through the PC/Itunes.
I get interference/ hum with low audio only from the PC, if i connect an ipad/iphone direct to AC source via isolator the sound is perfect, also if i play the radio on amp it's perfect.

One problem i did notice when playing is amp seems to be overheating when playing audio through PC, this maybe the issue and i will test amp in aonther install today or tomorrow.

Am i missing something here?

[cactikid]

not too sure but speakers and amps may not be compatible like the 2,4,or 8 ohm specs and i dont think you can run that through network.found this.
Google Image Result for http://www.teac.eu/fileadmin/project_data/hifi/products/full-size-components/receivers/ag-980/GALLERY/ag-980-03_GALLERY.jpg (http://www.google.ie/imgres?imgurl=http://www.teac.eu/fileadmin/project_data/hifi/products/full-size-components/receivers/ag-980/GALLERY/ag-980-03_GALLERY.jpg&imgrefurl=http://www.teac.eu/hifi-audio/full-size-components/receiver/ag-980/&h=476&w=1024&sz=78&tbnid=nbeW6py14Rp38M:&tbnh=56&tbnw=121&zoom=1&usg=__R2YJ8mu7HKM7yikI0pM2lJ8-wzk=&docid=T_E93xA2U1IwSM&sa=X&ei=MkJUUOW5E5GQhQfA4oCACQ&ved=0CDUQ9QEwBQ&dur=61352)

recheck all connections also.

[systemseiko]

The speakers that i ma using are Sonace CR101
http://www.cyberselect.co.uk/products/CR101_manual.pdf

Speaker impedance is 8 Ohm and each speaker is directly connected to L/R channel in each zone.
I have changed ground loop isolator to rule this out with no effect, will test amplifier today and update thread

[jimbowarner]

sounds like the sound card in pc is setup wrong?

[thecelticfan]

Sounds like earthing to me.

Pc must have a pd to the sound system.

Check yer plugs.