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DIY & Tutorials
DIY For Audio
My sonosub research and questions
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<blockquote data-quote="Timber_MG" data-source="post: 243205" data-attributes="member: 18"><p>There are two factors at play, volume displacement to move the air at low frequencies and efficiency, or the amount of power required to move that air.</p><p></p><p>With two drivers and twice the volume, you get 6dB more output (or moving twice as much air), 3dB from having double the electrical input power and the other 3dB becasue of the increase in efficiency as a result of the second woofer.</p><p></p><p></p><p>At low frequencies you often run into a displacement limit (Xmax). If we ignore power ratings and assume that your woofer has 10mm Xmax and another woofer exactly like yours except with 20mm Xmax, at low frequencies the 20mm Xmax unit will have 6dB more output (with 6dB or 4x more input power required for that feat)</p><p></p><p>Now double the enclosure volume (which gives you 3dB more efficiency at low frequencies) and add another woofer (3dB more electrical power handling) you get 6dB more acoustic output (same as moving twice the ammount of air).</p><p></p><p>WinISD is a great tool to model these effects.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 243205, member: 18"] There are two factors at play, volume displacement to move the air at low frequencies and efficiency, or the amount of power required to move that air. With two drivers and twice the volume, you get 6dB more output (or moving twice as much air), 3dB from having double the electrical input power and the other 3dB becasue of the increase in efficiency as a result of the second woofer. At low frequencies you often run into a displacement limit (Xmax). If we ignore power ratings and assume that your woofer has 10mm Xmax and another woofer exactly like yours except with 20mm Xmax, at low frequencies the 20mm Xmax unit will have 6dB more output (with 6dB or 4x more input power required for that feat) Now double the enclosure volume (which gives you 3dB more efficiency at low frequencies) and add another woofer (3dB more electrical power handling) you get 6dB more acoustic output (same as moving twice the ammount of air). WinISD is a great tool to model these effects. [/QUOTE]
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DIY & Tutorials
DIY For Audio
My sonosub research and questions
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