Audio Note (UK) Marks 35 Years of the Oto Integrated Amplifier with Anniversary Edition The legendary Oto SE receives its first major technical revision in decades, featuring bespoke in-house components and a redesigned power supply. WEST SUSSEX, UK - Audio Note (UK) is pleased to announce the release of the Oto SE 35, a significant update to one of the most enduring integrated amplifiers in high-end audio.