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AllegroSound - Esoteric Audio Research EAR-509 monoblock ...
http://www.allegrosound.com/EAR_509.html
Esoteric Audio Research 509 monoblock amplifiers - Reviewers wade in on the Reissue - "Impressively sleek, classy, and emphatically preferred with high end speakers. Total isolation confers, and the immediate advantage is that each …
Esoteric Audio Research EAR 509 – Classic Audio
https://www.classicaudio.fi/product/esoteric-audio-research-ear-509/
Esoteric Audio Research EAR 509. ... Mukaan myös alkuperäinen käyttöohje, jossa kytkentäkaaviot alkuperäiseen ja Mk II-versioon vuodelta 2004. Huollettu; Laitteet on parannettu versio alkuperäisestä, sisältää alkuperäisen PL 509 sijaan PL 519 putket (käyttöikä n. 20 000 tuntia, hieman enemmän tehoa) sekä uusittualkuperäiset 4 ...
Ear 509 mk2 opinion - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/ear-509-mk2-opinion
The 509 Mk II's don't have a tube sound and are not a lush exaggerated sound. They are clear, clean and fast with tremendous bass, for any amplifier. Tube sound used to mean "beautiful" in a colored way, that's not the 509's. You may be disappointed if you want rose colored glasses. The 509's are certainly powerful enough for your application.
Vintage HiFi Club E A R - Esoteric Audio Research ...
http://www.vintagehificlub.com/quote-elettroniche/e-a-r-esoteric-audio-research/
Steve's - Esoteric Audio Research
http://www.audiocircuit.com/Home-Audio/Esoteric-Audio-Research
Within a year, he had set up Esoteric Audio Research Ltd., and was marketing the remarkable EAR 509 100 watt professional tube mono block power amplifiers. He developed a unique output transformer/tube interface circuit called balanced bridge mode", in which all the electrodes (except the control grids) have their own separate windings on the ...
100瓦输出功率：EAR 509 胆机功放_设计 - Sohu.com
http://www.sohu.com/a/344731987_120163540
Tim于1976年创立了EAR(Esoteric Audio Research)，第一炮作品就是著名的EAR 509。这是一部输出100瓦的单声道电子管后级，使用由电子管名厂Mullard设计的PL509电子管，采用了改良过的Tim de Paravicini平衡桥式线路。
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