IH8PunkRok Posted November 30, 2012 Report Share Posted November 30, 2012 I was just thinking the other day and something occurred to me. Why do we care so much about the DCR of subs when they are obviously in an AC circuit? Shouldn't Z be more important? I just can't wrap my head around it and hopefully someone with more electrical knowledge than I will chime in and explain -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
MrSkippyJ Posted November 30, 2012 Report Share Posted November 30, 2012 A reference point maybe? A way to check coil integrity? F150: Stock 2019 Harley Road Glide: Amp: TM400Xad - 4 channel 400 watt Processor: DSR1 Fairing (Front) 6.5s -MMats PA601cx Lid (Rear) 6x9s - TMS69 Link to comment Share on other sites More sharing options...
finkster Posted November 30, 2012 Report Share Posted November 30, 2012 That is why the manufactures give you a nominal impedance, which is the load that the amp will see a lot of the time....because that's how the sub was made. We measure using DCR because the speaker is not moving when we are measuring it DAT 4125------>RE XXX comps active Eclipse cd7000 I serve drunks for a living Link to comment Share on other sites More sharing options...
kirill007 Posted December 2, 2012 Report Share Posted December 2, 2012 I was just thinking the other day and something occurred to me. Why do we care so much about the DCR of subs when they are obviously in an AC circuit? Shouldn't Z be more important? I just can't wrap my head around it and hopefully someone with more electrical knowledge than I will chime in and explain Because the impedance changes with a different frequency, the impedance also changes based on the amp connected to. Current and voltage are out of phase and that's why the impedance changes too. So it's not very simple to use the impedance. Why would DCR or Z be important? If you use a program like Winisd, you can get the impedance curve if you need that. That is why the manufactures give you a nominal impedance, which is the load that the amp will see a lot of the time....because that's how the sub was made. We measure using DCR because the speaker is not moving when we are measuring it The amp won't see a nominal impedance the most of the time. Impedance changes if the frequency changes, so i doubt you listen to tones.. They calculate nominal impedance, not measure it. (Znom=squareroot(L/C)) Thinking is the root of all problems... You ALWAYS get what you pay for. Link to comment Share on other sites More sharing options...
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