I also have a pair of Encores with the latest tweeters. I am driving them with a Pass X350.5. My system was going through an overhaul, and I ended up getting a pair of Parsifals at the end. I thought the X350.5 might be an overkill for these speakers. After checking with Verity, I pulled out my Pass Aleph Os which outputs 40wpc pure class A. The combination sounded flat and murky. There's a thread a few weeks ago discussing about powering the Parsifals, and another person also had similar experience trying to drive his Parsifals with a low-powered amp. I would recommend trying something at least 100 wpc.
FrankC
FrankC