Boeing, they are quite component specific and their expense varies greatly. Some are very effective and others much less so. Everything is trial and error.
Gbmcleod, my old Western Electric and Reimyo 300B amps took a long time to sound their best. Not three hours but close to that.
Gbmcleod, my old Western Electric and Reimyo 300B amps took a long time to sound their best. Not three hours but close to that.