I can't speak to the Adcom, but I have a 4BST that I use with a pair of Totem Acoustic Model One Sig's, which are also 4 ohms. The 4BST provides in excess of 400 watts into 4 ohms, and the Totems love it. I also have a pair of ProAc Response 2.5's, and a pair of ProAc Response 1SC's, but whenever I hook up the Totems I stay up until 3:30 am on work nights because I am so amazed at the sound I can't turn it off.
