Question on McCormack MLD preamp

I have a question about the McCormack MLD which I have the opportunity to buy. For a while I had a McCormack TLC-1. Passive stage and" buffered" stage. Although it sounded very good  in active mode it just lacked the dynamics of a' regular' active stage. I did all the research I could on the MLD and all I could find still doesn`t tell me whether or not the active stage is " buffered " or regular. I know it sounds confusing and I may not be using the right terms but any help would be appreciated.