evolvist, The KDs/3 is not a current product, and the Linn site doesn't show a single streamer/DAC with a power amp built in?https://www.linn.co.uk/hifi-separates/network-music-players/klimax#klimax-ds
The breakdown is like this:
K = Klimax
DS = Digital Streamer
3 = Katalyst Engine
This came out in December 2016 as an upgrade to the DS/2. The Katalyst engine is what took the Linn to a new level. The difference between the DS/2 and the DS/3 is akin to the distance from Earth to Neptune. A totally different approach.
So, yeah, I can see why just looking up "KD/3" might cause some confusion. :-)
Oh, and yeah, there's no amp in it. It's a streamer, DAC, and pre-amp combo.