Hi, I was wondering if anyone knows the efficiency of the EPI 201 speakers. I have a Marantz 2230 (30 watts per channel) and not sure if it will drive these speakers to their potential. I realize they have the 4 ohm option which should help. I am currently running a pair of B&W 601 bookshelves with the Marantz. I have looked everywhere and can't find any info regarding the efficiency of these old EPI speakers. Any help/advice/suggestions would be greatly appreciated.