18W\/4531-01<\/a><\/p>\n <\/p>\n (click on picture to zoom)<\/p>\n Left:<\/strong> 18W\/4531-00<\/p>\n Right:<\/strong> 18W\/4531-01<\/p>\n <\/p>\n These two mid-woofers are very similar and the main difference is the cone material used. The -00 version uses a sliced paper cone and where the slices are filled with damping glue. The -01 version uses a similar sliced paper cone, but the paper cone is also mixed with wood fibers, hence the slightly grayer color of the cone.<\/p>\n Both versions have a 38mm voice-coil, but the -01 version has a slightly taller (0.5mm) voice-coil compared to the -00 version. In all other aspects e.g. magnet size etc. they are identical and even though the official specification indicates that the -01 version has a slightly larger cone area of the two (157cm2 v.s. 150cm2), it has the same cone area as the -00 version.<\/p>\n <\/p>\n <\/p>\n (click on picture to zoom)<\/p>\n Blue:<\/strong> 18W\/4531-00<\/p>\n Green:<\/strong> 18W\/4531-01<\/p>\n The impedance wrinkle around 800Hz is a bit more pronounced for the -01 version compared to the -00 version. Besides that the impedance plot is virtually identical between the two versions.<\/p>\n <\/p>\n <\/p>\n (click on picture to zoom)<\/p>\n Left:<\/strong> Frequency response on-axis (Blue= -00 version, Red= -01 version). Both versions have an extended frequency response and a very smooth frequency roll-off without any nasty cone break-ups.<\/p>\n The -00 version has a smoother frequency response around 800Hz (where the impedance wrinkle is) compared to the -01 version. It also has a slightly more extended frequency response.<\/p>\n The -01 version on the other hand has a slightly smoother frequency response in the 2-6kHz range compared to the -00 version.<\/p>\n They are both outstanding frequency response performers compared to just about any 7\u201d mid-woofers in the market.<\/p>\n <\/p>\n <\/p>\n (click on picture to zoom)<\/p>\n Left:<\/strong> 18W\/4531-00<\/p>\n Right:<\/strong> 18W\/4531-01<\/p>\n Both versions have a very low odd-order distortion profile, but both also have an elevated second-order distortion profile in the 0,4-1,2kHz area.<\/p>\n <\/p>\n Both the -00 and the -01 version are top performers and any of them can be chosen from a performance perspective. Most likely they can also be a drop in replacement to each other in many designs and it\u2019s more a matter of price and availability, which one to choose. I personally think the less common -01 version with its wood fiber cone looks interesting.<\/p>\n","protected":false},"excerpt":{"rendered":" This time on the test bench we have the ScanSpeak 18W\/4531 mid-woofer from the \u201dRevelator\u201d series. The two tested driver units are the 18W\/4531-00 and the 18W\/4531-01. Measurement details for the two different mid-woofer versions can be found here: 18W\/4531-00 18W\/4531-01 (click on picture to zoom) Left: 18W\/4531-00 Right: 18W\/4531-01 What\u2019s the difference […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-4983","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4983","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"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=4983"}],"version-history":[{"count":7,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4983\/revisions"}],"predecessor-version":[{"id":4998,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4983\/revisions\/4998"}],"wp:attachment":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531-00-vs-01_2.jpg\")
<\/a>![\"\"](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531-00-vs-01_3.jpg\")
<\/a>
\n![\"\"](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531-00-vs-01_5.jpg\")
<\/a>![\"\"](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531-00-vs-01_4.jpg\")
<\/a><\/p>\nWhat\u2019s the difference between the -00 and the -01 version?<\/span><\/h3>\n
Impedance:<\/span><\/h3>\n
![\"18W4531G](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531G-Imp-00-vs-01.jpg\")
<\/a><\/p>\nFrequency:<\/strong><\/span><\/h3>\n
![\"18W4531G](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531G-Freq-0deg-00-vs-01.jpg\")
<\/a>![\"18W4531G](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531G-Freq-15deg-00-vs-01.jpg\")
<\/a><\/p>\n
\nRight:<\/strong> Frequency response 15deg off-axis (Blue= -00 version, Red= -01 version).<\/p>\nDistortion:<\/span><\/h3>\n
![\"18W4531G-00_56880-29-2R--15cm](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531G-00_56880-29-2R-15cm-95db.jpg\")
<\/a>![\"18W4531G-01_58032-15-2R--15cm](\"https:\/\/www.audioexcite.com\/wp-content\/uploads\/2016\/01\/18W4531G-01_58032-15-2R-15cm-95db.jpg\")
<\/a><\/p>\nSum-up:<\/span><\/h3>\n