Thyname the Luxman should drive the 803D3 fine, it really comes down to how loud you play and the room size.
We had the 20 Watt Luxman 550 and it drove many speakers really well in a smallish room at a distance of 8 feet from the speakers.
The non Class A luxman are not quite as sweet sounding as the lower powered Class A amplifiers which have a warmer fuller midrange.
So it will all come down to the source and cabling.
Give it a try and see what you think.
Dave and Troy
Audio Doctor NJ
We had the 20 Watt Luxman 550 and it drove many speakers really well in a smallish room at a distance of 8 feet from the speakers.
The non Class A luxman are not quite as sweet sounding as the lower powered Class A amplifiers which have a warmer fuller midrange.
So it will all come down to the source and cabling.
Give it a try and see what you think.
Dave and Troy
Audio Doctor NJ