I wanted to build a tube system around the highly sensitive Focus HD's, which present a very stable 4 ohm load. With the NEO250's optimized for a 5 ohm load, I thought it would be a good match. The HD's havent hit the 300 hour mark yet, so the transformation hasnt started yet. The amps currently have less than 50 hours on them as well. However they are starting to mesh well. Thinking about upgrading into the new Fosgate Signature tube phono stage, which is dual mono. Some tweeks here and there left, such as room treatments, that should keep me busy for awhile.Oh, and chasing those ground loops...