The LK140 was actually a good solid state amp. I think the output stage was a thick film type from memory. Unlike the previous LK100, which sounded grainy even with a few years under it's belt, the 140 was clean and clear and well able to drive low impedance loads. It changed cosmetically (power button and paint finish) in its lifetime (I think this may be a later one) and the real benefit was in being able to have aktiv cards fitted inside. Keildh's and especially Ninkas driven actively with LK140's were seriously good I remember.

I liked the LK140 a lot and it'll be great with some smaller floor standing speakers in need of tightening up. Just try not to use a Linn preamp with it as these add colouration and in the case of the Kairn, reduce soundstage depth as well.