Audio Research preamp LS vs SP

What is the difference between ARC preamp LS line and SP line.

thanks

jeromexzh04-15-2001 4:08pm

rhljazz Details Discussions Posts This discussion Message User 1,255 posts 11-07-2001 at 11:53pm Copy Comment URL Report Comment Edit Delete I would guess the LS stands for line stage series and the SP stands for stereo preamp which presumably would have a phono stage. I think all current product is line stage and you need an outboard phono.