{"id":4160,"date":"2013-12-20T17:00:09","date_gmt":"2013-12-20T17:00:09","guid":{"rendered":"http:\/\/www.audioexcite.com\/?p=4160"},"modified":"2013-12-20T17:24:58","modified_gmt":"2013-12-20T17:24:58","slug":"sb-acoustics-mid-woofer-measurements","status":"publish","type":"post","link":"https:\/\/www.audioexcite.com\/?p=4160","title":{"rendered":"SB Acoustics Mid-woofer Measurements!"},"content":{"rendered":"

\"\"<\/a>
\n\"\"<\/a>\"\"<\/a><\/p>\n

(click on picture to zoom)<\/p>\n

Left:<\/strong> SB15MFC30-4
\nRight:<\/strong> SB15NRXC30-4<\/p>\n

Here\u2019s a new set of measurements!<\/p>\n

This time I\u2019ve tested a pair of SB Acoustics 4\u2126 mid-woofers. The main difference between the two drivers is the cone material used. The SB15MFC30-4 uses a mineral filled Polypropylene (PP) cone and the SB15NRXC30-4 uses a coated Papyrus fiber cone.<\/p>\n

They both share all other features like the same type of chassis, voice-coil, surround and motor system etc.<\/p>\n

They are more alike than different in its measurement performance and it will be interesting to see if they subjectively sounds different from each other.<\/p>\n

Detailed measurement data:<\/p>\n

SB Acoustics SB15MFC30-4<\/a>
\nSB Acoustics SB15NRXC30-4<\/a><\/p>\n

SB15MFC30-4 vs. SB15NRXC30-4 comparison:<\/span><\/h3>\n

 <\/p>\n

Build quality and looks:<\/strong><\/p>\n

At a first glance they both look confusingly similar to each other. The SB15MFC30-4 with its Polypropylene cone is slightly darker and shiny in its color compared to the coated structure of the SB15NRXC30-4.<\/p>\n

They both have an impressive build quality with a high performance\/price ratio.<\/p>\n

Impedance:<\/span><\/h3>\n

 <\/p>\n

\"Imp<\/a><\/p>\n

(click on picture to zoom)<\/p>\n

Green = SB15MFC30-4
\nBlue = SB15NRXC30-4<\/p>\n

They have\u00a0 almost identical impedance plots besides the difference in the impedance peak of the resonance frequency (Fs).<\/p>\n

Frequency:<\/span><\/h3>\n

 <\/p>\n

\"Freq<\/a>\"Freq<\/a><\/p>\n

(click on picture to zoom)<\/p>\n

Left: On-axis
\nRight: 15deg off-axis<\/p>\n

Blue = SB15MFC30-4
\nRed = SB15NRXC30-4<\/p>\n

They have almost the same frequency response in the mid-range. The PP cone of the SB15MFC30-4 rolls of a bit earlier than the SB15NRXC30-4, but they both have a very extended frequency response.<\/p>\n

Distortion:<\/span><\/h3>\n

 <\/p>\n

\"SB15MFC30-4-1L<\/a>\"SB15NRXC30-4-1L<\/a><\/p>\n

(click on picture to zoom)<\/p>\n

95dB @ 1m<\/strong><\/p>\n

Left = SB15MFC30-4
\nRight = SB15NRXC30-4<\/p>\n

The SB15MFC30-4 has slightly higher odd-order distortion, but they are both good performers in this price class. When a proper cross-over design is in place, the difference should be negligible.<\/p>\n

Summary:<\/span><\/h3>\n

 <\/p>\n

These two mid-woofers are more alike than different from each other and it will be interesting to see how they sonically differ.<\/p>\n

Based on the measurements performance I consider both these mid-woofer to be of high value and with a high performance\/price ratio.<\/p>\n","protected":false},"excerpt":{"rendered":"

(click on picture to zoom) Left: SB15MFC30-4 Right: SB15NRXC30-4 Here\u2019s a new set of measurements! This time I\u2019ve tested a pair of SB Acoustics 4\u2126 mid-woofers. The main difference between the two drivers is the cone material used. The SB15MFC30-4 uses a mineral filled Polypropylene (PP) cone and the SB15NRXC30-4 uses a coated Papyrus fiber […]<\/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-4160","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4160","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=4160"}],"version-history":[{"count":5,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4160\/revisions"}],"predecessor-version":[{"id":4171,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=\/wp\/v2\/posts\/4160\/revisions\/4171"}],"wp:attachment":[{"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.audioexcite.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}