Hi,Just connect the front R&L pre outs on the 806 to an input on your external amp.
I'm connected to the aux connection.
One thing to remember, the volume you set on your external amp ie half way up the volume range, always has to be the same. the level you choose when you callibrate your AV amp. If you've got a numbered or db level on your amp this helps, because if it's not the same the balance of your home cinema will be incorrect for your front channels.
There have been other messages on this forum about this, it might be worth a check as they explain it better than I can.