{"id":121,"date":"2008-06-09T13:07:39","date_gmt":"2008-06-09T05:07:39","guid":{"rendered":"http:\/\/127.0.0.1\/wordpress63\/?p=121"},"modified":"2013-03-29T18:53:05","modified_gmt":"2013-03-29T10:53:05","slug":"oh-corals","status":"publish","type":"post","link":"https:\/\/diyparadise.com\/w\/oh-corals\/","title":{"rendered":"Oh Corals!"},"content":{"rendered":"<p>some Coral enclosures for you<br \/>\n<!--more--><\/p>\n<h2 align=\"center\"><span>Some Coral Enclosures<\/span><\/h2>\n<p>&nbsp;<\/p>\n<p><span><br \/>\nBy now, if you already have the Coral Flat 6s and 8s, you should put it in a proper enclosure and let it sing. I did some modelling and apparently, the enclosures recommended by Coral itself is pretty good. Which shouldn&#8217;t be suprising&#8230;<br \/>\n<\/span><\/p>\n<p><span><span><br \/>\nBut first of all, here are the T\/S parameters of Flat 8 and Flat 6 as measured by <a href=\"http:\/\/audiohobbyist.com\">Mr CG Ew<\/a> after a run in of 50 hours. Thanks Mr Ew!<br \/>\n<\/span><\/span><\/p>\n<div align=\"center\"><center><\/center><\/div>\n<table width=\"400\" border=\"0\">\n<tbody>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Parameter<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">Coral Flat 8A<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">Coral Flat 6B<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Fo<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">54Hz<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">68Hz<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Qms<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">7.312<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">5.671<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Qes<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">0.52738<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">0.433<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Qts<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">0.4919<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">0.402<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"100\" height=\"20\">Vas<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">60.319 L<\/td>\n<td valign=\"top\" width=\"100\" height=\"20\">31.346 L<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span><span>\u00a0<\/span><\/span><\/p>\n<p><span><span><span><br \/>\nEnclosures recommended by Corals, taken from Coral brochures\/catalogs. Also, refer <a href=\"http:\/\/www.eastmarinedrive.com\/audio\/2003\/coral.html\">East Marine Drive<\/a>, a good source of info on the Corals.<br \/>\n<\/span><\/span><\/span><\/p>\n<p><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/p>\n<p><center><span><span><span><span><a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat_reflex.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat_reflex.jpg\" width=\"354\" \/><\/a><br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/coral_reflex_sealed.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/coral_reflex_sealed.jpg\" width=\"354\" \/><\/a><\/span><\/span><\/span><\/span><\/center><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/p>\n<p><center><br \/>\n<span><span><span><span><br \/>\n<script type=\"text\/javascript\">\/\/ <![CDATA[\ngoogle_ad_client = \"pub-8623111428385411\";\ngoogle_ad_width = 468;\ngoogle_ad_height = 60;\ngoogle_ad_format = \"468x60_as\";\n\/\/ ]]><\/script><br \/>\n<script type=\"text\/javascript\" src=\"http:\/\/pagead2.googlesyndication.com\/pagead\/show_ads.js\">\/\/ <![CDATA[\n\n\/\/ ]]><\/script><br \/>\n<\/span><\/span><\/span><\/span><\/center><span><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/p>\n<p><center><span><span><span><span><span>Here is a different design for the Flat 8s, supposedly from an old Danish hifi mag in the 70s.<br \/>\nBass reflex, taller box.<br \/>\nHere&#8217;s the dimensions for the above design. Dimensions are external dimensions. Use 18\/20mm or 3\/4&#8243; plywood.<br \/>\nThe Danish mag calls for a port of certain length but simulation shows best result with 3\/4&#8243; length,<br \/>\nmeaning using the baffle as port length. Anyway, feel free to &#8220;tune&#8221; the bass to your liking later by<br \/>\nadjusting port length. Pardon my poor &#8220;drawing&#8221;.<br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/bigger_reflex.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/bigger_reflex.jpg\" width=\"250\" \/><\/a><br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat8_reflexb.gif\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat8_reflexb.gif\" width=\"354\" \/><\/a><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/center><span><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><center><span><span><span><span><span><span>Suprise! Suprise! A customer of mine found that using<br \/>\nthe Flat 8 in this &#8220;Multi-Duct&#8221; bass reflex enclosure meant<br \/>\nfor the Beta 8 sounds very good as well.<br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/beta8_reflex.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/beta8_reflex.jpg\" width=\"400\" \/><\/a><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/center><span><span><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><center><span><span><span><span><span><span><span>This is for the Flat 6s. Note that it uses 2 Flat 6 drivers.<br \/>\nNo info as to the drivers are to be wired in series or parallel.<br \/>\nLooks very interesting.<br \/>\nI built it. Paralleled them. Perfect match for my Darling amp! <\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/center><center><span><span><span><span><span><span><span><br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat6plan.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/flat6plan.jpg\" width=\"400\" \/><\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/center><center><\/center><center><span><span><span><span><span><span><span><br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/double_flat6s.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/double_flat6s.jpg\" width=\"200\" \/><\/a><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/center><span><span><span><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><center><span><span><span><span><span><span><span>It seems to my untrained eyes, the T\/S parameters for the Flat 8s<br \/>\nare quite similar to those of the Beta 8s. No wonder they sound good<br \/>\nin the bass reflex box meant for Beta 8s! If that is the case, I would<br \/>\nbelieve that horn loading the Flat 8s in this enclosure meant for the<br \/>\nBeta 8 will be a good bet as well. Back-loaded horn meant for Beta 8.<br \/>\n<a href=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/beta8blh.jpg\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/diyparadise.com\/w\/wp-content\/uploads\/images\/stories\/corals\/beta8blh.jpg\" width=\"600\" \/><\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/center><span><span><span><span><span><span><span><br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span><span><span><span>General rule of thumb. The bigger the enclosure, the better the sound! *hint*hint* the back-loaded horn!*wink*wink<br \/>\n<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p><span><span><span><span><span><span><span>\u00a0<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>some Coral enclosures for you<\/p>\n","protected":false},"author":1,"featured_media":613,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[1147,1470,260,1604,1605],"class_list":["post-121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects","tag-bass-reflex","tag-coral-enclosures","tag-coral-flat","tag-coral-flat-6","tag-coral-flat-8","has_thumb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oh Corals! 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