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<blockquote data-quote="Water Bear" data-source="post: 8820481" data-attributes="member: 673826">There is some confusion here. I&#039;m not arguing that you should try to figure out your woofer&#039;s impedance as a function of frequency by plopping numbers in software or something along those lines and then getting power from that. We all agree, I imagine, that using something a la the AMM-1 is the way you&#039;d actually do it in practice.My point is more that this information isn&#039;t really helping OP. Maybe he wants to spring for a $350 measuring instrument, but I assume not. He&#039;s chosen to go the multimeter route. 2 ohm is the nominal impedance of his sub, meaning that they (the manufacturers) expect it to present that load at some practical frequency in actual application. He should be seeing the right numbers coming out of his amp, and the easiest explanation is that his input signal is too low.Somehow this thread is devolving into nit-picking minutia that doesn&#039;t really help OP. He said that it distorts at 38 - we already know that. We aren&#039;t talking theoreticals here. I don&#039;t know how he got that number and I don&#039;t care - I&#039;m willing to run with it.</blockquote>

[QUOTE="Water Bear, post: 8820481, member: 673826"] There is some confusion here. I'm not arguing that you should try to figure out your woofer's impedance as a function of frequency by plopping numbers in software or something along those lines and then getting power from that. We all agree, I imagine, that using something a la the AMM-1 is the way you'd actually do it in practice. My point is more that this information isn't really helping OP. Maybe he wants to spring for a $350 measuring instrument, but I assume not. He's chosen to go the multimeter route. 2 ohm is the nominal impedance of his sub, meaning that they (the manufacturers) expect it to present that load at some practical frequency in actual application. He [I]should [/I]be seeing the right numbers coming out of his amp, and the easiest explanation is that his input signal is too low. Somehow this thread is devolving into nit-picking minutia that doesn't really help OP. He said that it distorts at 38 - we already know that. We aren't talking theoreticals here. I don't know how he got that number and I don't care - I'm willing to run with it. [/QUOTE]

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