There was a blue dot revision around the first of the year that further refined some of the analog section to address noise floor issues reported by some users. Many users (apparently including the guy selling you his 950) had no problem with the red dot revision that it replaced. There is also a DTS-ES upgrade (a chip replacement to eliminate a bug in DTS-ES playback) that can be gotten for free from Outlaw.
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Pre/Pro Comparison Chart |
950 Review