ProAc 1 SC vs. ProAc D1

I own the 1SC. I auditioned the DI in my listening room. In comparing the SC to the D1, I liked the SC better. However, I also auditioned the D2 in my listening room. I like the D2 better then the SC. My advice is get a dealer to let you audition all these in your listening room. That is the only way to tell. And, of course, stands are a must, shot loaded is possible.

The sound of D1 is more brighter and sharper than 1sc

I prefer the SC's warmer sound.