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Since 2000 each year the "European Triode Festival" (ETF) has been held in various venues in Europe (the first three events were called "Aarhus Triode Festival" aka "ATF"). The ETF focuses on do-it-yourself audio valve amplifiers using triode vacuum tubes, and brings together some 100 high end vacuum tube audiophiles from all over the world (from as far away as Finland and New Zealand). At the Festival participants demonstrate their (all home-built) equipment (analogue/digital/amps/speakers/etc.) and discuss all aspects of high-end vacuum tube sound reproduction. It's a private venture of audio lovers; commercial activities are not allowed. For the first 3 years, the festival was organised by Kurt Steffensen and held in Aarhus, Denmark. During the next 3 years, Christian Rintelen and Wolfgang Braun organised the festival and held it in Langenargen, Germany. In 2006 and 2007 Guido Tent and Emile Sprenger organized the Festival in The Beukenhof, a former monastery in Biezenmortel, The Netherlands. In 2008 Guido teamed up with Arend-Jan Wijtzes and Rob Hubertse to organize the final Dutch edition and in 2009 the festival moved to Stella-Plage, France. During the 4 days of the Festival, several seminars, workshops, shootouts and musical performances are organised. Previous seminar speakers have included people like Jean Hiraga, Morgan Jones, Lynn Olson, Per Lundahl (Lundahl Transformers), Brian Sowter (Sowter Transformers of England), Steve Bench, Guido Tent (Tentlabs), Allen Wright (VSE), Peter van Willenswaard of Stereophile magazine, Pieter Treurniet (Tribute Transformers) and John Broskie (GlassWare and Tube CAD Journal). Previous workshops have included subjects such as power supplies (shunt/series/passive/regulated), the sound of distortion, noise and hum, speaker crossovers and digital jitter. Audio gear listening competitions are held for items such as phono stages, full range speakers, single-ended triode amplifiers and output transformers. ETFs have been reviewed in several magazines, including Revue du Son, MJ, TNT Audio, 6Moons and Prestige Audio Video. A recurring item with each Festival is a Special Guest that is invited to join the Festival and hold a presentation about a high-end audio subject of their own choice. ==See also== *Tube sound 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「European triode festival」の詳細全文を読む スポンサード リンク
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