over the years i owned a lot of speaker even panels , with ML sl3 , Apogee duetta signature and Monsoon fpf-1600 , but since I have bought my request ( used ) in 2016 I never feeled the need of changing them . Even at a time a guy who was selling his ESL 15A that are really a newer model . That the difference between both don't worth the investment . Yes they are better but for the price Request is unbeatable . On my side with Classé audio Electronic it's almost pefect , precision , transparency a lot of bass if you want . Nothing to take them in fault .