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DIY For Audio
Help needed: Active XO - Subwoofer
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<blockquote data-quote="ludo" data-source="post: 50031" data-attributes="member: 691"><p>If you do like the bottom circuit in this pic:</p><p></p><p><img src="http://www.silcom.com/~aludwig/Sysdes/Active_xo.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>R=7k5</p><p>C=100nF (Note the cap at the top is 200nF then.)</p><p>Opamps can be TL072 or such.</p><p></p><p>As it stands, it's 2nd order, so you cascade two of these for 4th order then.</p><p></p><p>The formula etc is at http://www.silcom.com/~aludwig/Sysdes/Active_LR.htm</p><p></p><p>How much space inside the receiver? What voltages? Or do you want it external?</p></blockquote><p></p>
[QUOTE="ludo, post: 50031, member: 691"] If you do like the bottom circuit in this pic: [IMG]http://www.silcom.com/~aludwig/Sysdes/Active_xo.gif[/IMG] R=7k5 C=100nF (Note the cap at the top is 200nF then.) Opamps can be TL072 or such. As it stands, it's 2nd order, so you cascade two of these for 4th order then. The formula etc is at http://www.silcom.com/~aludwig/Sysdes/Active_LR.htm How much space inside the receiver? What voltages? Or do you want it external? [/QUOTE]
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DIY & Tutorials
DIY For Audio
Help needed: Active XO - Subwoofer
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