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DIY For Audio
Help needed: Active XO - Subwoofer
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<blockquote data-quote="ludo" data-source="post: 50034" data-attributes="member: 691"><p>Yes, one takes the input, filters, feeds the next, which filters some more and drives the output.</p><p></p><p>TL072 is good for this. It's a dual. Freq is so low the distortion will be negligible. R2.50 a pop is hard to beat too <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>No heatsink. They're lowish-power opamps so a sealed box is fine. </p><p></p><p>+-17V is about as far as one can take 072s safely. +-15V Should be perfect.</p><p></p><p>One can do it on stripboard, but a PCB may be useful. I'm happy to knock one together so it's available to everyone.</p></blockquote><p></p>
[QUOTE="ludo, post: 50034, member: 691"] Yes, one takes the input, filters, feeds the next, which filters some more and drives the output. TL072 is good for this. It's a dual. Freq is so low the distortion will be negligible. R2.50 a pop is hard to beat too :D No heatsink. They're lowish-power opamps so a sealed box is fine. +-17V is about as far as one can take 072s safely. +-15V Should be perfect. One can do it on stripboard, but a PCB may be useful. I'm happy to knock one together so it's available to everyone. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Help needed: Active XO - Subwoofer
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