A true referencing dac, preamp,and head amp. No need for super detail. If you have interest, you know this beast. Newest firmware just came out last month, and I purchased direct from Benchmark, bringing it to dac3 performance minus the newest Sabre dac. I figure buyer would be better to install, as to familiarize one self with internals and settings. I can also install if desired. Just remember there are other jumper settings inside that are for your particular amp and headphone. Remote is a sweet add on I purchased with firmware. Original msrp when released was actually 2,195$ with remote, but lower now with dac3 release. Second owner, and not in factory box. otherwise would rate as a 9 since it is in perfect condition. Always been in kid, pet and smoke free environment.