{"id":445,"date":"2011-10-17T11:49:52","date_gmt":"2011-10-17T09:49:52","guid":{"rendered":"http:\/\/www.audioexcite.com\/?page_id=445"},"modified":"2013-12-07T20:41:17","modified_gmt":"2013-12-07T20:41:17","slug":"scanspeak-15w4531g00","status":"publish","type":"page","link":"https:\/\/www.audioexcite.com\/?page_id=445","title":{"rendered":"ScanSpeak 15W\/4531G00"},"content":{"rendered":"

\u00a0Overview:<\/span><\/strong><\/h3>\n

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\"\"<\/a>The 15W\/4531G00 is a 4\u03a9 mid-woofer from the ScanSpeak\u00a0 Revelator series. It uses a sliced paper cone where the slices are filled with damping glue, which dramatically reduces breakup modes in the diaphragm. It has an extremely smooth frequency response without any visible cone break-ups. The on-axis frequency response is incredibly\u00a0 extended and goes up to 5kHz where its slowly and controllable starts to roll-off.<\/p>\n

This driver can be used up to 3kHz without “beaming” becomes an issue which is very good considering its size of 95cm\u00b2. It uses the Scan-Speaks low-loss linear suspension and the patented Symmetrical Drive (SD-1).<\/p>\n

This driver is one of the very best mid-woofers on the market and with a nice mid-range clarity, great woofer capabilities and an overall smooth frequency response characteristics.<\/p>\n

ScanSpeak spec sheet: 15W\/4531G00<\/a><\/p>\n

T\/S Parameters:<\/strong><\/span><\/h3>\n

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\"\"<\/a>The mid-woofers where burnt-in with a signal generator for 24 hours before measuring the T\/S parameters. It seems like that the T\/S parameters are a bit off from the ScanSpeak spec sheets, but that seems to be the normal behaviour from many manufacturers and perhaps especially from ScanSpeak.<\/p>\n

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

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\"\"<\/a> Free air impedance measurement:<\/p>\n

Sample 1 = Green<\/p>\n

Sample 2 = Blue<\/p>\n

Nice and smooth impedance response with a minor bump centered around 850Hz.<\/p>\n

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

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Frequency measurement conditions:<\/strong><\/p>\n

The mid-woofer is measured mounted in a 14 liter Dayton Audio enclosure (PartsExpress part #302-721) baffle with the following conditions:<\/p>\n

Baffle size (WxH):<\/strong> 21,59×35,56cm (8,5″x14″)<\/p>\n

Driver position:<\/strong> Mounted on center-line with driver unit center 14cm from bottom of the baffle.<\/p>\n

Mic position:<\/strong> 1m distance, 13.6cm above driver unit center (tweeter-axis)<\/p>\n

Smoothing:<\/strong> No smoothing applied.<\/p>\n

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

0deg tweeter-axis
\nSample 1 = Blue
\nSample 2 = Red<\/p>\n

Nice consistency between the two driver unit samples. Very extended frequency response up to 5kHz and with a smooth roll-off and no visible cone break-ups.<\/p>\n

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0deg = Blue
\n15deg = Red
\n22.5deg = Green<\/p>\n

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0deg = Blue
\n15deg = Red
\n30deg = Green<\/p>\n

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0deg = Blue
\n30deg = Red
\n45deg = Green<\/p>\n

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

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The distortion measurements are done in near-field and the amplifier output level was adjusted for the driver unit so that the fundamental is 85dB at 1m and 90dB at 1m. This setting simulates normal to medium-high listening levels.<\/p>\n