It will take at least a week or two before it settles in on the "true" sound. There's really no rushing this and between now and then you will find the amp going through various changes. That said, if you're planning on using new cables, suggest you integrate them now, so all grows together (if that makes sense).It's here--a day early! Kudos to Mike Lee at Denafrips Support for getting the shipment dispatched so quickly!
Will report back later, after everything gets settled.
Oh, make sure you don't throw the warranty card out. Should be one in the box coming if you got from Denafrips.
Good luck.