{"id":7087,"date":"2018-12-16T16:26:03","date_gmt":"2018-12-16T16:26:03","guid":{"rendered":"http:\/\/www.audioexcite.com\/?page_id=7087"},"modified":"2018-12-26T11:25:56","modified_gmt":"2018-12-26T11:25:56","slug":"sb-acoustics-sb17nrxc35-4","status":"publish","type":"page","link":"https:\/\/www.audioexcite.com\/?page_id=7087","title":{"rendered":"SB Acoustics SB17NRXC35-4"},"content":{"rendered":"<h3><a href=\"https:\/\/www.hifikit.se\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-7122 size-medium\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/hifikit-logo-300x78.png\" alt=\"\" width=\"300\" height=\"78\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/hifikit-logo-300x78.png 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/hifikit-logo.png 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><span style=\"color: #3366ff;\">Overview:<\/span><\/h3>\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"alignright is-resized\"><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/09\/SB17NRXC35-8.jpg\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-6508\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/09\/SB17NRXC35-8.jpg\" alt=\"\" width=\"230\" height=\"372\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/09\/SB17NRXC35-8.jpg 465w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/09\/SB17NRXC35-8-185x300.jpg 185w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/><\/a><\/figure>\r\n<\/div>\r\n\r\n\r\n\r\n<p>The SB Acoustics SB17NRXC35-4 is a 4\u03a9\u00a0 6&#8243; mid-woofer from SB Acoustics.<\/p>\r\n\r\n\r\n\r\n<p>The mid-woofer has a 35.5mm voice-coil with a healthy 11mm (p-p) linear coil travel. It has a very low voice-coil inductance and is fitted with a copper sleeve on the pole piece to ensure a low distortion performance.<\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n<p><strong>Key features:<\/strong><\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Vented cast aluminum chassis for optimum strength and low compression<\/li>\r\n<li>Proprietary cone material with natural fibers made in-house<\/li>\r\n<li>Soft low damping rubber surround for improved transient response<\/li>\r\n<li>Non-conducting fiber glass voice coil former for minimum damping<\/li>\r\n<li>Extended copper sleeve on pole piece for low inductance and low distortion<\/li>\r\n<li>CCAW voice coil for reduced moving mass<\/li>\r\n<li>Long life silver lead wires<\/li>\r\n<li>Vented pole piece for reduced compression<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n<p><strong>Note!<\/strong> This driver has been discontinued, but can be found second hand and at some shops!<\/p>\r\n\r\n\r\n\r\n<p>SB Acoustics Spec sheet: <a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Rev-1-DISCONTINUED.pdf\" target=\"_blank\" rel=\"noopener\">SB17NRXC35-4 Rev-1-DISCONTINUED<\/a><\/p>\r\n<h3><span style=\"color: #3366ff;\">T\/S Parameters:<\/span><\/h3>\r\n<p>&nbsp;<\/p>\r\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7095\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4.jpg\" alt=\"\" width=\"360\" height=\"276\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4.jpg 691w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4-300x230.jpg 300w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4-known-mass.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7096\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4-known-mass.jpg\" alt=\"\" width=\"360\" height=\"274\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4-known-mass.jpg 694w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/T-S-parameters-SB17NRXC35-4-known-mass-300x229.jpg 300w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\r\n<p>(Click on picture to zoom)<\/p>\r\n<p><strong>Left:<\/strong> T\/S parameters measured using \u201cadded\u201d mass method in horizontal position.<\/p>\r\n<p><strong>Right:<\/strong> T\/S parameters measured using \u201cknown\u201d mass method in vertical position.<\/p>\r\n<h3><span style=\"color: #3366ff;\">Impedance:<\/span><\/h3>\r\n<p>&nbsp;<\/p>\r\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7097\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R.jpg\" alt=\"\" width=\"360\" height=\"271\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R.jpg 1232w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-300x226.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-768x579.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-1024x772.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7098\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom.jpg\" alt=\"\" width=\"360\" height=\"271\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom.jpg 1232w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom-300x226.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom-768x579.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Imp-1L-vs-2R-zoom-1024x772.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-file\">\r\n<p>(click on picture to zoom)<\/p>\r\n<p><strong>Left:<\/strong> Free-air impedance driver sample #1 vs. sample #2.<br \/><strong>Right:<\/strong> Close-up of free-air impedance driver sample #1 vs. sample #2.<\/p>\r\n<p>Some wrinkles in the impedance plot are visible at about 1.0-1.5kHz.<\/p>\r\n<h3><span style=\"color: #3366ff;\">Frequency:<\/span><\/h3>\r\n<\/div>\r\n<p><strong>Frequency measurement conditions:<\/strong><\/p>\r\n<p>The mid-woofer is measured mounted on a baffle in an 17.6 liter closed enclosure with the following conditions:<\/p>\r\n<p><strong>Baffle size (WxH):<\/strong> 20\u00d740cm. No baffle edge round-over.<br \/><strong>Driver position:<\/strong> Mounted on center-line with driver unit center 17cm from the bottom of the baffle.<br \/><strong>Mic position:<\/strong> 1m distance, on mid-woofer-axis. Measurement valid down to 275Hz.<br \/><strong>Smoothing:<\/strong> No smoothing applied.<\/p>\r\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7100\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R.jpg\" alt=\"\" width=\"360\" height=\"271\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R.jpg 1232w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R-300x226.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R-768x579.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0deg-1L-vs-2R-1024x772.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7101\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R.jpg\" alt=\"\" width=\"360\" height=\"271\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R.jpg 1232w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R-300x226.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R-768x579.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-15deg-1L-vs-2R-1024x772.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\r\n<p>(click on picture to zoom)<\/p>\r\n<p><strong>Left:<\/strong> Frequency response on-axis (Blue=sample #1, Red=sample #2).<br \/><strong>Right:<\/strong> Frequency response 15deg off-axis (Blue=sample #1, Red=sample #2).<\/p>\r\n<p>Some difference between the two tested driver samples around 1.2-1.7kHz.<\/p>\r\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7103\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg.jpg\" alt=\"\" width=\"720\" height=\"543\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg.jpg 1232w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg-300x226.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg-768x579.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-Freq-0-60deg-1024x772.jpg 1024w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\r\n<p>(click on picture to zoom)<\/p>\r\n<p>2.5kHz is about the highest suitable cross-over frequency for this mid-woofer.<\/p>\r\n<h3><span style=\"color: #3366ff;\">Distortion:<\/span><\/h3>\r\n<p>&nbsp;<\/p>\r\n<p><strong>Measurement setup:<\/strong><\/p>\r\n<ul>\r\n<li>Mid-woofer near-field measurement at 18cm<\/li>\r\n<li>Frequency Range Mid-woofer: 200-10000Hz<\/li>\r\n<li>Baffle size WxH: 20\u00d740cm<\/li>\r\n<\/ul>\r\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 90dB and 95dB at 1m. This setting simulates medium-high to high listening levels.<\/p>\r\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7104\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db.jpg\" alt=\"\" width=\"360\" height=\"196\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db.jpg 1404w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db-300x164.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db-768x419.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-90db-1024x559.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7105\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db.jpg\" alt=\"\" width=\"360\" height=\"196\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db.jpg 1404w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db-300x164.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db-768x419.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2018\/12\/SB17NRXC35-4-1-18cm-95db-1024x559.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\r\n<p>(click on picture to zoom)<\/p>\r\n<p><strong>Left:<\/strong> = 90dB @ 1m<\/p>\r\n<p><strong>Right:<\/strong> = 95dB @ 1m<\/p>\r\n<p>Overall this is a very low distorting mid-woofer. We have some harmless elevated second-order harmonics around 1.3KHz, around the cone edge resonance.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Overview: &nbsp; The SB Acoustics SB17NRXC35-4 is a 4\u03a9\u00a0 6&#8243; mid-woofer from SB Acoustics. The mid-woofer has a 35.5mm voice-coil with a healthy 11mm (p-p) linear coil travel. It has a very low voice-coil inductance and is fitted with a copper sleeve on the pole piece to ensure a low distortion performance. Key features: Vented [&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-7087","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/7087","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=7087"}],"version-history":[{"count":15,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/7087\/revisions"}],"predecessor-version":[{"id":7179,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/7087\/revisions\/7179"}],"wp:attachment":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}