I received the Neco Soundlabs amp a few days ago. Let the burn-in begin! I am currently using it only on a 1989 Sony D-250 discman using line-out. It is a significant improvement over using the phone out. I am quite new to the jargon to use but to me the spectrum of the sound is better. More bass for starters (using the KSC75) but there's less muffled sound in the middle. The contrast between lows, mids and highs is better. It all sounds more 'split'. Also it sounds more '3D'. I know from the KSC75 that the sound will change when using it for hours and hours. So I am already happy with the amp.
Now bring on my LOD mister postman, so I can check out the iPod on the amp as well!