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<blockquote data-quote="Rkrajnov" data-source="post: 7568708" data-attributes="member: 628037">So before I just played it by ear to set my gains and what not and I figured cause I didn&#039;t hear any distortion that it would be ok, but I ended up blowing my sub and I have a feeling it&#039;s because I wasn&#039;t careful with this. So I read that you are supposed to use the formula V = sqrt(PxR). My sub can safely handle about 1200 RMS and I have it hooked up to an audioque 1200d. It&#039;s a dual 2 ohm and its wired in parallel to have a 1 ohm load, so then for R I would use 1 correct? The sqrt of 1200 is about 34.6, so is that about the amount of volts I want to read off on the DMM? Also when should it read off this many volts? When the HU is set to 75% or 100%? Also I&#039;m guessing I should use this same technique for my speakers and their input sensitivity? Sorry for stupid questions, I&#039;m still pretty much a n00b at this. Me and my friend installed my system, but he knows much more than me haha (though it was both our first times installing a car audio system).Anything else important to know about this?</blockquote>

[QUOTE="Rkrajnov, post: 7568708, member: 628037"] So before I just played it by ear to set my gains and what not and I figured cause I didn't hear any distortion that it would be ok, but I ended up blowing my sub and I have a feeling it's because I wasn't careful with this. So I read that you are supposed to use the formula V = sqrt(PxR). My sub can safely handle about 1200 RMS and I have it hooked up to an audioque 1200d. It's a dual 2 ohm and its wired in parallel to have a 1 ohm load, so then for R I would use 1 correct? The sqrt of 1200 is about 34.6, so is that about the amount of volts I want to read off on the DMM? Also when should it read off this many volts? When the HU is set to 75% or 100%? Also I'm guessing I should use this same technique for my speakers and their input sensitivity? Sorry for stupid questions, I'm still pretty much a n00b at this. Me and my friend installed my system, but he knows much more than me haha (though it was both our first times installing a car audio system). Anything else important to know about this? [/QUOTE]

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