No not just your amp. The Preamp /processor also will need time to burn in. I suggest that you turn the system on and say to an FM music station, it need not be loud and let the units play for a day, switching through the different processor settings etc. Then play a cd or two for a number of hours straight in surround mode and stereo, finally doing the same for DVD's etc. NONE of this need the volume cranked, infact for the processor it could have little or no volume. It is just about warming up and settling the various circuits, i.c.'s etc.

Then take time with a familiar movie to get a good idea of how your surround sounds and adjust the levels etc. If you have a spl meter, you can use that to fine tune thngs aswell.

HTH.