AudioResearch VS55 Röhrenendstufe Überprüfung und Modifikation

Review of an Audio Research VS55 amplifier, which, according to its owner, has sonic issues and overheats. 00:00 Introduction 03:10 Testing the unit 16:52 Explanation of the schematic 22:45 Listening test 24:20 Modification of resistors at grid 2 32:38 Conclusion I'd be interested in your opinion on the amplifier and the modification; please comment. https://elektrotanya.com/audio-resear...