{"id":4770,"date":"2014-10-21T19:27:48","date_gmt":"2014-10-21T19:27:48","guid":{"rendered":"http:\/\/www.audioexcite.com\/?page_id=4770"},"modified":"2014-10-21T20:53:55","modified_gmt":"2014-10-21T20:53:55","slug":"scanspeak-d2905950000","status":"publish","type":"page","link":"https:\/\/www.audioexcite.com\/?page_id=4770","title":{"rendered":"ScanSpeak D2905\/950000"},"content":{"rendered":"<h3><span style=\"color: #3366ff;\">Overview:<\/span><\/h3>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500_1.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-4774\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500_1.jpg\" alt=\"D2905-9500_1\" width=\"191\" height=\"268\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500_1.jpg 428w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500_1-214x300.jpg 214w\" sizes=\"auto, (max-width: 191px) 100vw, 191px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>The D2905\/950000 is a 6\u03a9 tweeter from the ScanSpeak Clasic series.<\/p>\n<p>The tweeter uses a non-resonant chamber. The optimized pole piece geometry reduces flow resistance and the anti-resonator-plug in the rear chamber eliminates turbulence. A light ferrofluid is used in the air gap to ensure optimal linear mechanical behavior and minimal micro-dynamic non-linearity.<\/p>\n<p>Key features:<\/p>\n<ul>\n<li>1&#8243; Textile Dome Diamphragm<\/li>\n<li>Low Resonance Rear Chamber<\/li>\n<li>Ferro Fluid<\/li>\n<li>Black Painted Alu Face Plate<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>ScanSpeak Spec sheet: <a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/d2905-950000.pdf\">D2905\/950000<\/a><\/p>\n<h3><span style=\"color: #3366ff;\">T\/S Parameters:<\/span><\/h3>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-TS-parameters.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4777\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-TS-parameters.jpg\" alt=\"D2905-9500 TS-parameters\" width=\"360\" height=\"247\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-TS-parameters.jpg 676w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-TS-parameters-300x205.jpg 300w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p>One of the tweeter driver samples have slightly lower Fs than the official specification while the other have slightly higher.<\/p>\n<h3><span style=\"color: #3366ff;\">Impedance:<\/span><\/h3>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Imp-3L-vs-4R-WT3.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4778\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Imp-3L-vs-4R-WT3.jpg\" alt=\"D2905-9500-Imp 3L vs 4R WT3\" width=\"720\" height=\"405\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Imp-3L-vs-4R-WT3.jpg 1366w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Imp-3L-vs-4R-WT3-300x168.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Imp-3L-vs-4R-WT3-1024x575.jpg 1024w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>Sample 1<\/strong> = Blue<br \/>\n<strong>Sample 2<\/strong> = Green<\/p>\n<p>Of the four tweeter samples tested all had some variation in the impedance peak and shape around the resonance frequency (Fs). In the usable frequency range above 2kHz, all the tweeter samples measured virtually the same.<\/p>\n<h3><span style=\"color: #3366ff;\">Frequency:<\/span><\/h3>\n<p>&nbsp;<\/p>\n<p><strong>Frequency measurement conditions:<\/strong><\/p>\n<p>The tweeter is measured mounted on a baffle with the following conditions:<\/p>\n<p><strong>Baffle size (WxH):<\/strong> 24\u00d735cm with 18mm round-over.<br \/>\n<strong>Driver position:<\/strong> Mounted on center-line with driver unit center 8,2cm from the top of the baffle.<br \/>\n<strong>Mic position:<\/strong> 1m distance, on tweeter-axis.<br \/>\n<strong>Smoothing:<\/strong> 1\/24 octave smoothing applied.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0deg-3L-vs-4R.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4780\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0deg-3L-vs-4R.jpg\" alt=\"D2905-9500-Freq 0deg 3L vs 4R\" width=\"360\" height=\"122\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0deg-3L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0deg-3L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0deg-3L-vs-4R-1024x345.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-15deg-3L-vs-4R.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4781\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-15deg-3L-vs-4R.jpg\" alt=\"D2905-9500-Freq 15deg 3L vs 4R\" width=\"360\" height=\"122\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-15deg-3L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-15deg-3L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-15deg-3L-vs-4R-1024x345.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>Left:<\/strong> Frequency response on-axis (Blue=sample1, Red=sample2).<br \/>\n<strong>Right:<\/strong> Frequency response 15deg off-axis (Blue=sample1, Red=sample2).<\/p>\n<p>The two tweeter samples measures virtually the same, which indicates good consistency in the manufacturing process.<\/p>\n<p>Very smooth and extended on-axis frequency response. Measuring from 15deg off-axis, the response is even smoother with a slowly dropping frequency response from 15kHz.<\/p>\n<p>The bump at 2kHz and the dip at 3.5kHz are baffle diffraction effects.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0-15-22.5deg-4R.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4783\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0-15-22.5deg-4R.jpg\" alt=\"D2905-9500-Freq 0-15-22.5deg 4R\" width=\"720\" height=\"243\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0-15-22.5deg-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0-15-22.5deg-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-0-15-22.5deg-4R-1024x345.jpg 1024w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>0deg = Blue<br \/>\n15deg = Red<br \/>\n22.5deg = Green<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-30-45-60deg-4R.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4784\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-30-45-60deg-4R.jpg\" alt=\"D2905-9500-Freq 30-45-60deg 4R\" width=\"720\" height=\"243\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-30-45-60deg-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-30-45-60deg-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-Freq-30-45-60deg-4R-1024x345.jpg 1024w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>30deg = Blue<br \/>\n45deg = Red<br \/>\n60deg = Green<\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"color: #3366ff;\">Distortion:<\/span><\/h3>\n<p>&nbsp;<\/p>\n<p><strong>Measurement setup:<\/strong><\/p>\n<ul>\n<li>Tweeter near-field measurement at 10cm<\/li>\n<li>Frequency Range Tweeter: 500-10000Hz<\/li>\n<li>Baffle size WxH: 24\u00d735cm<\/li>\n<\/ul>\n<p>The distortion measurements are done in near-field and the amplifier output level was adjusted for each driver so that the fundamental is\u00a0 90dB and 95dB at 1m. This setting simulates medium-high and high listening levels.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-90db.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4788\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-90db.jpg\" alt=\"D2905-9500-3L--10cm 90db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-90db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-90db-300x172.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-90db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-90db.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4789\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-90db.jpg\" alt=\"D2905-9500-4R--10cm 90db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-90db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-90db-300x172.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-90db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p><strong>90dB @ 1m<\/strong> (click on picture to zoom)<\/p>\n<p>Left = Sample 1<\/p>\n<p>Right = Sample 2<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-95db.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4790\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-95db.jpg\" alt=\"D2905-9500-3L--10cm 95db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-95db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-95db-300x172.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-3L-10cm-95db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-95db.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4791\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-95db.jpg\" alt=\"D2905-9500-4R--10cm 95db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-95db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-95db-300x172.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2015\/10\/D2905-9500-4R-10cm-95db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p><strong>95dB @ 1m<\/strong> (click on picture to zoom)<\/p>\n<p>Left = Sample 1<\/p>\n<p>Right = Sample 2<\/p>\n<p>The ScanSpeak D2905\/950000 tweeter have a remarkable low third-order distortion profile below 2kHz. This tweeter has the ability to be crossed over very low and a cross-over between 1.5-2kHz should be feasible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview: &nbsp; &nbsp; The D2905\/950000 is a 6\u03a9 tweeter from the ScanSpeak Clasic series. The tweeter uses a non-resonant chamber. The optimized pole piece geometry reduces flow resistance and the anti-resonator-plug in the rear chamber eliminates turbulence. A light ferrofluid is used in the air gap to ensure optimal linear mechanical behavior and minimal micro-dynamic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4770","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/4770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4770"}],"version-history":[{"count":10,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/4770\/revisions"}],"predecessor-version":[{"id":4772,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/4770\/revisions\/4772"}],"wp:attachment":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}