{"id":5868,"date":"2016-09-05T19:34:45","date_gmt":"2016-09-05T19:34:45","guid":{"rendered":"http:\/\/www.audioexcite.com\/?page_id=5868"},"modified":"2017-08-01T17:13:30","modified_gmt":"2017-08-01T17:13:30","slug":"sb-acoustics-sb17crc35-8","status":"publish","type":"page","link":"https:\/\/www.audioexcite.com\/?page_id=5868","title":{"rendered":"SB Acoustics SB17CRC35-8"},"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\/2016\/09\/SB17CRC35-8_13.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-5869\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/09\/SB17CRC35-8_13.jpg\" width=\"320\" height=\"213\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/09\/SB17CRC35-8_13.jpg 448w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/09\/SB17CRC35-8_13-300x200.jpg 300w\" sizes=\"auto, (max-width: 320px) 100vw, 320px\" \/><\/a>The SB17CRC35- is an 8\u2126\u00a0 6\u2033 mid-woofer from SB Acoustics.<\/p>\n<p>The mid-woofer has a 35.5mm voice-coil with a 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>\n<p><strong>Key features:<\/strong><\/p>\n<ul>\n<li>Rohacell\/Carbon fibre sandwich cone for optimized stiffness\/damping ratio.<\/li>\n<li>Vented cast aluminum chassis for optimum strength and low compression.<\/li>\n<li>Low damping rubber surround for improved transient response.<\/li>\n<li>Non-conducting fibre glass voice coil former for minimum damping.<\/li>\n<li>Extended copper sleeve on pole piece for low inductance and low distortion.<\/li>\n<li>CCAW voice coil for reduced moving mass.<\/li>\n<li>Long life silver lead wires.<\/li>\n<li>Vented pole piece for reduced compression.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>SB Acoustics Spec sheet: <a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/09\/6in-SB17CRC35-8.pdf\">6in SB17CRC35-8<\/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\/2017\/09\/T-S-Parameters-WT2.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5874\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT2.jpg\" alt=\"t-s-parameters-wt2\" width=\"360\" height=\"221\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT2.jpg 863w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT2-300x184.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT2-768x471.jpg 768w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT3.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5876\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT3.jpg\" alt=\"t-s-parameters-wt3\" width=\"360\" height=\"218\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT3.jpg 872w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT3-300x182.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/T-S-Parameters-WT3-768x466.jpg 768w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>Left:<\/strong> T\/S parameters measured with Smith &amp; Larson Audio WT2 woofer tester. Measured &#8220;cold&#8221;.<\/p>\n<p><strong>Right:<\/strong> T\/S parameters measured with\u00a0Dayton Audio WT3 woofer tester. Measured after 10min of 5volt &#8220;massage&#8221; @ 28Hz.<\/p>\n<p>Higher Qts and resonance frequency as well as a slightly lower sensitivity than the official specification.<\/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\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5879\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R.jpg\" alt=\"imp-sb17crc-8-1l-vs-2r\" width=\"360\" height=\"202\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R.jpg 1366w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-300x169.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-768x432.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-1024x576.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5880\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom.jpg\" alt=\"imp-sb17crc-8-1l-vs-2r-zoom\" width=\"360\" height=\"202\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom.jpg 1366w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom-300x169.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom-768x432.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Imp-SB17CRC-8-1L-vs-2R-zoom-1024x576.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>Left:<\/strong> Mid-woofer sample #1 vs #2.<\/p>\n<p><strong>Right:<\/strong> Mid-woofer sample #1 vs #2 close-up.<strong><br \/>\n<\/strong><\/p>\n<p>A visible resonance issue at 1.6-1.7kHz and 6.5kHz.<\/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 mid-woofer is measured mounted on a baffle in an 14 liter closed enclosure with the following conditions:<\/p>\n<p><strong>Baffle size (WxH):<\/strong> 24\u00d735cm with 18mm round-over on the baffle edges (r=18).<br \/>\n<strong>Driver position:<\/strong> Mounted on center-line with driver unit center 22cm from the top of the baffle.<br \/>\n<strong>Mic position:<\/strong> 1m distance, on mid-woofer-axis.<br \/>\n<strong>Smoothing:<\/strong> 1\/24 octave smoothing applied.<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5883\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R.jpg\" alt=\"freq-sb17crc35-8-0deg-1l-vs-4r\" width=\"360\" height=\"122\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R-768x259.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0deg-1L-vs-4R-1024x346.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5884\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R.jpg\" alt=\"freq-sb17crc35-8-15deg-1l-vs-4r\" width=\"360\" height=\"122\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R-768x259.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-15deg-1L-vs-4R-1024x346.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=sample#1 Red=sample#2).<br \/>\n<strong>Right:<\/strong> Frequency response 15deg off-axis (Blue=sample#1, Red=sample#2).<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5885\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R.jpg\" alt=\"freq-sb17crc35-8-0-15-22deg-1l-vs-4r\" width=\"720\" height=\"243\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R-768x259.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-0-15-22deg-1L-vs-4R-1024x346.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\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5886\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R.jpg\" alt=\"freq-sb17crc35-8-30-45-60deg-1l-vs-4r\" width=\"720\" height=\"243\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R.jpg 1117w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R-300x101.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R-768x259.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/Freq-SB17CRC35-8-30-45-60deg-1L-vs-4R-1024x346.jpg 1024w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>30deg = Blue<br \/>\n45deg = Red<br \/>\n60deg = Green<\/p>\n<p>Smooth frequency response up to 4kHz. Minor cone break-ups at 4.9kHz and 6.5kHz. The resonance issue seen in the impedance plot at 1.6-1.7kHz is seen here as a frequency dip in the off-axis frequency measurements.<\/p>\n<p>2kHz is about the highest suitable cross-over frequency for this mid-woofer.<\/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>Mid-woofer near-field measurement at 18cm<\/li>\n<li>Frequency Range Mid-woofer: 200-10000Hz<\/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 90dB and 95dB at 1m. This setting simulates medium-high and high listening levels.<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5889\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db.jpg\" alt=\"sb17crc35-8-1-18cm-90db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db-300x173.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db-768x443.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-90db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5890\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db.jpg\" alt=\"sb17crc35-8-2-18cm-90db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db-300x173.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db-768x443.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-90db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>90dB @ 1m<\/strong><\/p>\n<p>Left = Sample #1<\/p>\n<p>Right = Sample #2<\/p>\n<p><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5891\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db.jpg\" alt=\"sb17crc35-8-1-18cm-95db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db-300x173.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db-768x443.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-1-18cm-95db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><a href=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db.jpg\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-5892\" src=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db.jpg\" alt=\"sb17crc35-8-2-18cm-95db\" width=\"360\" height=\"207\" srcset=\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db.jpg 1234w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db-300x173.jpg 300w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db-768x443.jpg 768w, https:\/\/www.audioexcite.com\/wp-content\/uploads\/2017\/09\/SB17CRC35-8-2-18cm-95db-1024x590.jpg 1024w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><\/a><\/p>\n<p>(click on picture to zoom)<\/p>\n<p><strong>95dB @ 1m<\/strong><\/p>\n<p>Left = Sample #1<\/p>\n<p>Right = Sample #2<\/p>\n<p>The SB17CRC35-8\u00a0 mid-woofer has a generally low distortion profile. However, the resonance issue shown in the impedance and frequency plots at 1.6-1.7kHz is found here as an elevated odd and even order distortion.\u00a0 Because of the overall very low distortion profile, the odd-order distortion spike at 1.6-1.7kHz look worse than it is. The rise in the second-order distortion at the same frequency might contribute to some coloration or unique sound character.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview: &nbsp; The SB17CRC35- is an 8\u2126\u00a0 6\u2033 mid-woofer from SB Acoustics. The mid-woofer has a 35.5mm voice-coil with a 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: Rohacell\/Carbon fibre sandwich cone [&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-5868","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/5868","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=5868"}],"version-history":[{"count":16,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/5868\/revisions"}],"predecessor-version":[{"id":6503,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/pages\/5868\/revisions\/6503"}],"wp:attachment":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}