have a SP12 PH12 preamp, ST120 amp, a sony SACD CD player, Rega RP3, a pair of Paradigm Studio 100's, and a Dynaudio Sub 250. I run RCA cables from the SP12 PH12 to the subwoofer's SAT/SUB input then out through the SAT output to the ST120. Everything was working fine for a month or so, but lately, the sub cuts out for like a measure of the music, sometimes preceded by a "pop" and then cuts back on. I've check that all of the connections are tight. I even bought new cables, but it didn't help. This happens when I play CD's, SACDs, and vinyl. I've contacted Dynaudio and they're trying to figure out what's going on, and said they'll get back to me, but I wanted to ask if anyone here had any ideas. If it turns out it's not the subwoofer, what else could it possibly be? I loaned my solid state amp to a friend and will try it out to see if it still happens, but I won't be able to do that for a couple days. And the bass still comes in on the main speakers even when the sub cuts out.