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Question about Gain setting
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<blockquote data-quote="spoonraker" data-source="post: 2810304" data-attributes="member: 570956"><p>I don't think you quite understand what I'm asking....</p><p></p><p>Basically here is how I understand you set gain :</p><p></p><p>1. Disconnect speakers from amp, turn head unit volume to ~85% maximum, turn amp gain all the way down</p><p></p><p>2. Calculate your target AC voltage. This number comes from the following formula : Voltage = sqrt(Power * Resistance)</p><p></p><p>3. While playing a test tone, connect an AC voltmeter to the amplifier speaker outputs, turn the gain up until you reach the desired voltage</p><p></p><p>4. Turn everything off, plug everything in, play the system at a moderate volume, and determine if anything needs to be turned down. Nothing should be turned up, only turn down the drivers that are overpowering.</p><p></p><p>That all makes perfect sense to me, but my question is about step 2.</p><p></p><p>When using the formula Votage = sqrt(Power * Resistance) are you supposed to use the Power your amplifier is rated at, or the power your subwoofer is rated at? My best guess is that you are supposed to use the amplifier power, since this formula is designed to determine maximum AC voltage without a clipped signal.</p></blockquote><p></p>
[QUOTE="spoonraker, post: 2810304, member: 570956"] I don't think you quite understand what I'm asking.... Basically here is how I understand you set gain : 1. Disconnect speakers from amp, turn head unit volume to ~85% maximum, turn amp gain all the way down 2. Calculate your target AC voltage. This number comes from the following formula : Voltage = sqrt(Power * Resistance) 3. While playing a test tone, connect an AC voltmeter to the amplifier speaker outputs, turn the gain up until you reach the desired voltage 4. Turn everything off, plug everything in, play the system at a moderate volume, and determine if anything needs to be turned down. Nothing should be turned up, only turn down the drivers that are overpowering. That all makes perfect sense to me, but my question is about step 2. When using the formula Votage = sqrt(Power * Resistance) are you supposed to use the Power your amplifier is rated at, or the power your subwoofer is rated at? My best guess is that you are supposed to use the amplifier power, since this formula is designed to determine maximum AC voltage without a clipped signal. [/QUOTE]
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