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<blockquote data-quote="maylar" data-source="post: 8924724" data-attributes="member: 541144">Are you looking to build a Line Output Converter (LOC) to send speaker level signals to an amp? If so, I highly recommend a commercial unit. They&#039;re cheap and some are quite small. But if you insist, I have a few comments on your design so far.First, HU outputs are differential, not ground referenced as your input circuit shows. You need differential amplifiers and you need to handle the DC bias that they have to ground. Each speaker lead has ~6 VDC to ground. Also, those op-amps want a split power supply. I&#039;ve used a charge pump type converter in the past that gives you the -12 volt rail from a +12 volt input.As for output voltage, anywhere from 2 to 4 vrms is fine.I suggest checking into <a href="https://www.diyaudio.com/community/forums" target="_blank">https://www.diyaudio.com/community/forums</a> for expert advice. Good luck.</blockquote>

[QUOTE="maylar, post: 8924724, member: 541144"] Are you looking to build a Line Output Converter (LOC) to send speaker level signals to an amp? If so, I highly recommend a commercial unit. They're cheap and some are quite small. But if you insist, I have a few comments on your design so far. First, HU outputs are differential, not ground referenced as your input circuit shows. You need differential amplifiers and you need to handle the DC bias that they have to ground. Each speaker lead has ~6 VDC to ground. Also, those op-amps want a split power supply. I've used a charge pump type converter in the past that gives you the -12 volt rail from a +12 volt input. As for output voltage, anywhere from 2 to 4 vrms is fine. I suggest checking into [URL]https://www.diyaudio.com/community/forums[/URL] for expert advice. Good luck. [/QUOTE]

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