After listening to a pair of Transcendent mono's a month or so back, I knew I had to go OTL. I just received mine a few days ago and to say that this amp "transcends" any type of electronic signature is about the most apt description I can give. Just music; pure, ultra low noise floor, natural, dimensional and real. I can't imagine it can get too much better than this providing you have the right speakers. OTL's must be the best kept secret in high end unless maybe folks are too concerned about their less than dependable reputation. If you have the right speakers, love music and want to forget about the upgrade train, an OTL amp ANY OTL amp is a MUST audition. Another thing, this amp actually runs cooler than the ARC it replaced.