I never found this thread as I asked the same question Saki did. I borrowed a buddies ARC LS26 and hooked it up through the HT bypass and was disappointed. It sounded great with his ss amp but completed different with the PL. I also called Kevin @ Upscale and he said why would you want to add a preamp. After listening to the LS26 with my buddies ss amp i knew there were a few things missing with the passive preamp section of the PL. However, it didn't match well with the PL. The PL sounds very good regardless but there's something to be said for a good preamp.