https://hermitaudio.github.io/history/otala-story/index.htmlA story of the legendary 25W “Otala” amplifier as seen by Terje Sandstrøm, one of the original designers. Also see “The People Involved”, for other designers and people who contributed. Introduction — the birth of the Otala amplifier At an AES conference in 1973, Dr. Matti Otala presented a paper describing the design of a TIM-free audio amplifier. Among those attending was Svein Erik Børja, a Norwegian record and broadcasting producer and dedicated audio enthusiast. Børja was widely recognised for his exceptional listening ability—what audiophiles of the day referred to as a “Golden Ear.” Dissatisfied with the sound quality of many transistor amplifiers of the time, he immediately recognised the significance of Otala’s work. The theory behind TIM also provided an explanation for imperfections that he himself had consistently identified by listening.Hugoen-ushttps://hermitaudio.github.io/history/otala-story/evolution-notes/index.htmlMon, 01 Jan 0001 00:00:00 +0000https://hermitaudio.github.io/history/otala-story/evolution-notes/index.htmlEC/Otala historikk I have found an older handwritten page about what was changed when, which can be useful to see the evolution of the amplifer, probably written around 1980. It is course, very honest some places, but we can live with that. And I see it is my own handwriting. The image of the note is in Norwegian, but the extracted text is in English.