{"id":64,"date":"2018-11-18T15:50:24","date_gmt":"2018-11-18T13:50:24","guid":{"rendered":"http:\/\/jasu.servebeer.com\/sivut\/wordpress\/?page_id=64"},"modified":"2019-06-04T19:25:11","modified_gmt":"2019-06-04T16:25:11","slug":"the-tube","status":"publish","type":"page","link":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/hifi\/the-tube\/","title":{"rendered":"The Tube"},"content":{"rendered":"<p>Long time a go i build loudspeakers based on Seas P17 RE TVFC\/COAX elements. Closed enclosure 12 litres net volume.<\/p>\n<p>From the archives i found schematics for the crossover network. Since on that time my knowledge of loudspeaker design was very limited, the crossover is designed using &#8221;Stetson&#8221;-method. It was simulated using ltspice (no acoustical measurements etc).<\/p>\n<p>The speaker sounded quite thin and after i got some measurement equipment the reason was found to be baffle-step (never hear of such thing before). So i added 2.2mH inductor and 9 ohm parallel resistor (looked from excellent book The Loudspeaker Design Cookbook).<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-68\" src=\"http:\/\/jasu.servebeer.com\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/TheTube_Crossover-1.jpg\" alt=\"\" width=\"1916\" height=\"944\" srcset=\"http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/TheTube_Crossover-1.jpg 1916w, http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/TheTube_Crossover-1-300x148.jpg 300w, http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/TheTube_Crossover-1-768x378.jpg 768w, http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/TheTube_Crossover-1-1024x505.jpg 1024w\" sizes=\"auto, (max-width: 1916px) 100vw, 1916px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-82\" src=\"http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/IMG_20181129_192329.jpg\" alt=\"\" width=\"704\" height=\"938\" srcset=\"http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/IMG_20181129_192329.jpg 704w, http:\/\/jasun.hifisivut.dy.fi\/sivut\/wordpress\/wp-content\/uploads\/2018\/11\/IMG_20181129_192329-225x300.jpg 225w\" sizes=\"auto, (max-width: 704px) 100vw, 704px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Long time a go i build loudspeakers based on Seas P17 RE TVFC\/COAX elements. Closed enclosure 12 litres net volume. From the archives i found schematics for the crossover network. Since on that time my knowledge of loudspeaker design was very limited, the crossover is designed using &#8221;Stetson&#8221;-method. It was simulated using ltspice (no acoustical &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/jasun.hifisivut.dy.fi\/index.php\/hifi\/the-tube\/\">Jatka lukemista<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":19,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-64","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/64","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/comments?post=64"}],"version-history":[{"count":8,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/64\/revisions"}],"predecessor-version":[{"id":142,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/64\/revisions\/142"}],"up":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/19"}],"wp:attachment":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/media?parent=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}