What's the difference between LS series, SP series


Well, I've been trying to do a research on a difference between "Line Stage" and "SP series" of ARC. Since I just became a stereo lover. Can anyone tell me the differences and the definitions of both of them?

Thank you for your help.
ekanit_c
That is the difference. LS=line stage; SP=stereo preamplifier. PH=phono preamplifier, too.
I am not a electronic guru and I was wondering the same thing. Can anyone explain the difference between line stage and preamp. It might be a silly Question but I am new to all this lingo as well.

Thanks!
Grizz