Summary: What a disappointment. My first impression of these was "are the tweeters working"? Dull, lifeless and muddy best describe these. The speakers were well run in, driven by Arcam and Moon electronics in a well behaved room FYI. The look, feel and performance is your typical Chinese cheap.They never should have moved operations to China. It used to be the 600 series offered exceptional value as was the case with the previous, UK manufactured speakers, but no more.