I don't know about the changes in detail but the main difference is that SMD technology is deployed in the Basic+ resulting in shorter paths, probably also a tighter selection of parts.
I have been using the Basic for a couple of years but had already sold it when my brother purchased the Basic+ so we couldn't do a direct comparison. Nevertheless, I was amazed how "mature" the Basic+ sounded: less grain, better transients than the Basic I would have guessed.
Of course, THE real change is the possibility to use it with the Accu+ battery unit. Granted, that doubles its price but it catapults it into another league. Much better soundstage, better control in complex passages, less nervous, easier musical flow (which does not mean loss of dynamics, I hasten to add).
Here is some information on the Accu+
http://www.clearaudio.de/eng/pv_upgrading.html
I have been using the Basic for a couple of years but had already sold it when my brother purchased the Basic+ so we couldn't do a direct comparison. Nevertheless, I was amazed how "mature" the Basic+ sounded: less grain, better transients than the Basic I would have guessed.
Of course, THE real change is the possibility to use it with the Accu+ battery unit. Granted, that doubles its price but it catapults it into another league. Much better soundstage, better control in complex passages, less nervous, easier musical flow (which does not mean loss of dynamics, I hasten to add).
Here is some information on the Accu+
http://www.clearaudio.de/eng/pv_upgrading.html