{"id":92,"date":"2015-08-03T15:21:59","date_gmt":"2015-08-03T06:21:59","guid":{"rendered":"http:\/\/rageworx.iptime.org\/?p=92"},"modified":"2020-02-19T17:59:10","modified_gmt":"2020-02-19T08:59:10","slug":"an-iem-used-knowles-dual-balanced-armature","status":"publish","type":"post","link":"https:\/\/rageworx.info\/?p=92","title":{"rendered":"An IEM used Knowles dual balanced armature ?"},"content":{"rendered":"<p>I found an insteresting item in Ali-Express, ER610 of EARMAX &#8211; audio product manufacturer of China &#8211; and it seems to be used for dual balanced armature transducer(driver) in each units of left and right.<\/p>\n\n\t\t<style>\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 33%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-92 gallery-columns-3 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=101'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_003-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_003-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_003-300x300.jpg 300w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_003-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=100'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_002-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_002-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_002-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=99'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_001-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_001-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_001-300x300.jpg 300w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_001-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=102'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_004-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_004-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_004-150x150.jpg 150w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_004.jpg 300w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=95'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_005-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_005-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_005-300x300.jpg 300w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_005-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=96'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_006-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_006-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_006-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=97'><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_007-200x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_007-200x200.jpg 200w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_007-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/rageworx.info\/?attachment_id=98'><img loading=\"lazy\" decoding=\"async\" width=\"148\" height=\"200\" src=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/product_img_008-148x200.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/dt><\/dl>\n\t\t\t<br style='clear: both' \/>\n\t\t<\/div>\n\n<p>&nbsp;<\/p>\n<p>I can find an image for used Knowles B.A unit in their sales page: <a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-104\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver-500x375.jpg\" alt=\"knowls_driver\" width=\"500\" height=\"375\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver-500x375.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver.jpg 664w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>And there&#8217;s product number: K30265 by idendified with graphical adjust.<\/p>\n<p><a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver_anal.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-103\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowls_driver_anal.jpg\" alt=\"knowls_driver_anal\" width=\"300\" height=\"284\" \/><\/a>\u00a0 So I reached their information page of Knowles, <a href=\"http:\/\/www.knowles.com\/eng\/Products\/Receivers-and-speakers\/Hearing-instruments\/DTEC-series#\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.knowles.com\/eng\/Products\/Receivers-and-speakers\/Hearing-instruments\/DTEC-series#<\/a>\u00a0 and here\u00a0<a href=\"http:\/\/kr.mouser.com\/ProductDetail\/Knowles\/dtec-30265-000\/?qs=CwrZmfgQ%2F8PExkdM0ny2Cg%3D%3D\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/kr.mouser.com\/ProductDetail\/Knowles\/dtec-30265-000\/?qs=CwrZmfgQ%2F8PExkdM0ny2Cg%3D%3D<\/a><\/p>\n<p>It seems old-aged transducer type as I know before, and I can check RMS test result in their specification documents:<\/p>\n<p><a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-105\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq-429x500.jpg\" alt=\"knowles_spec_rms_freq\" width=\"429\" height=\"500\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq-429x500.jpg 429w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq-878x1024.jpg 878w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq-500x583.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq-685x799.jpg 685w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/knowles_spec_rms_freq.jpg 1005w\" sizes=\"auto, (max-width: 429px) 100vw, 429px\" \/><\/a> As their result, I can conjecture this IEM sound will enough to feeling in low to middle\u00a0 frequency, but less high frequency in non-tuned.\u00a0 Its response frequency impedence graph is like this:<a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/response_impedence.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-106\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/response_impedence-500x274.jpg\" alt=\"response_impedence\" width=\"500\" height=\"274\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/response_impedence-500x274.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/response_impedence-685x376.jpg 685w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/response_impedence.jpg 800w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>By impedence, it looks result for dual armatures, there&#8217;s deep reverse peak in 1400 to 1500. It means smoothness is may less than normal single balanced armature.<br \/>\nAnd frequency response is this(just same like RMS):<\/p>\n<p><a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_response.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-108\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_response-500x287.jpg\" alt=\"freq_in_hertz_response\" width=\"500\" height=\"287\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_response-500x287.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_response-685x393.jpg 685w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_response.jpg 1022w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>And here ED-29589-000 no-dampered frequency response graph of Etymotic research ER4P.<\/p>\n<p><a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-109\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000-500x237.jpg\" alt=\"freq_in_hertz_ed-29689-000\" width=\"500\" height=\"237\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000-500x237.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000-1024x486.jpg 1024w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000-685x325.jpg 685w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_ed-29689-000.jpg 1147w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>And here TWFK-30017-000 no-damped frequency response graph of GH-ERC-DMS.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-111\" src=\"http:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017-500x221.jpg\" alt=\"freq_in_hertz_twfk_30017\" width=\"500\" height=\"221\" srcset=\"https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017-500x221.jpg 500w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017-1024x453.jpg 1024w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017-685x303.jpg 685w, https:\/\/rageworx.info\/wp-content\/uploads\/2015\/08\/freq_in_hertz_twfk_30017.jpg 1052w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Its big differences may came from single or dual armature structure. But it could be checked response of 30265 will be wider than 29589, but 30265 is not similar either 29589 and 30017. 30017 seems extended version of 29589.<\/p>\n<p>Now I don&#8217;t have real product of ER610, my review will be continued when it came to me in 2 or 3 weeks later.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I found an insteresting item in Ali-Express, ER610 of EARMAX &#8211; audio product manufacturer of China &#8211; and it seems to be used for dual balanced armature transducer(driver) in each units of left and right. &nbsp; I can find an image for used Knowles B.A unit in their sales page:&#8230; <a href=\"https:\/\/rageworx.info\/?p=92\">Read more &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":103,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,9],"tags":[94,93,90,91,89,92],"class_list":["post-92","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-raphs","category-review","tag-94","tag-93","tag-earphone","tag-headphone","tag-iem","tag-knowles"],"_links":{"self":[{"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/posts\/92","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rageworx.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=92"}],"version-history":[{"count":0,"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/posts\/92\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rageworx.info\/index.php?rest_route=\/wp\/v2\/media\/103"}],"wp:attachment":[{"href":"https:\/\/rageworx.info\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=92"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rageworx.info\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=92"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rageworx.info\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=92"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}