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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: 244142" data-attributes="member: 18"><p>To model airflow velocity, I usually set an input level in dBfs (signal dB below full scale) which is appropriate for the application. Subwoofers are fairly narrow band which means that -3dB to -6dB gives a fair safe margin for design purposes with vented subs. If you EQ around tuning and expect a fair bit of energy in that band (with for HT is definitely the case) then you need to reduce the margin so I'd work with -3dB or 350W here if your amp can drive 700W into the load, noting that a vented sub has an impedance minimum around fc and heavy boost at that frequency will draw a fair bit of current when asked for.</p><p></p><p>I'll model up the limits tomorrow.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 244142, member: 18"] To model airflow velocity, I usually set an input level in dBfs (signal dB below full scale) which is appropriate for the application. Subwoofers are fairly narrow band which means that -3dB to -6dB gives a fair safe margin for design purposes with vented subs. If you EQ around tuning and expect a fair bit of energy in that band (with for HT is definitely the case) then you need to reduce the margin so I'd work with -3dB or 350W here if your amp can drive 700W into the load, noting that a vented sub has an impedance minimum around fc and heavy boost at that frequency will draw a fair bit of current when asked for. I'll model up the limits tomorrow. [/QUOTE]
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DIY & Tutorials
DIY For Audio
My sonosub research and questions
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