There is no doubt about the improvement over the NE-5532: we immediately gain quality in every domain ! As I have also changed a lot of other parts 75% of the original parts have been upgraded), I expect to get further improvements, coming from the burn in of both the Burson amps and the other parts. I would like to get more detailed information about your suggestions related to coupling caps surrounding the Burson amps… Thanks for making these V5 available for the DIY projects.