dohckiller808 Posted May 5, 2010 Report Share Posted May 5, 2010 well... when you target a freq to burp at. typically you wont see over a 2 ohm rise. if that helps... Link to comment Share on other sites More sharing options...
Boon Posted May 5, 2010 Report Share Posted May 5, 2010 well... when you target a freq to burp at. typically you wont see over a 2 ohm rise. if that helps... If you only ever play 1 tone in your car. And if you're burping around tuning, you can expect a lot more than 2 ohms of rise. 10.x volts fo' life! Link to comment Share on other sites More sharing options...
cracker Posted May 5, 2010 Report Share Posted May 5, 2010 The impedance is the resistance of the coil when AC is applied. Since the coil acts like an inductor, the impednace changes with frequency. What people call impedance rise is due to the woofer being put in a box. If you look at the impedance plot of a woofer in free air, the impedance rises at the resonant frequency of the driver. Once in the box, the cone has a different reaction with pressure behind it, which can change the impedance plot. You also have new impedance spikes due to the box size, port tuning, etc. Impedance rise may in fact not even be a higher impedance at all frequencies (more than likely will be an increase in the overall average, but the spike at the driver's resonant frequency may still be the highest impedance). Many times it is just additional humps/spikes in the impedance plot, or even changing of the impedance spike seen with the woofer in free air. For someone playing music, the additional humps/spikes will increase the average impedance seen while playing music. For someone burping at a single frequency, they need to know the impedance at their frequency to match the amp to the sub. There is a good chance the impedance will be higher near the frequency they burp at, since it not far above port tuning. For the average person, ignore "impedance rise". The hardcore competitor uses the actual true impedance to his advantage to get all the power he can from the amps thanks mang thats the answer i was looking for, im not smart enough to totally understand it all but got some more of an idea now lol thanks mang March 2010 SOTM winner my old buildhttp://www.stevemeadedesigns.com/board/topic/50219-dank-aka-crackers-bonne-new-v2-build-in-the-works-hahahaaaaaa/page__hl__crackers my youtube page - http://www.youtube.com/profile?user=jackiedan04#g/u my feedback - http://www.stevemeadedesigns.com/board/topic/56540-official-cracker-feedback/ i need tacos and bass to live!!!!! and will NEVER change hahaaaa TEAM NOIZE VIOLATION Link to comment Share on other sites More sharing options...
Neo_frog Posted May 5, 2010 Report Share Posted May 5, 2010 Credit is given to Brian (bkolfo4). I couldn't have summarized it better. Need an install? Hit me up.[email protected]Got car audio questions? Check here first!Everything you need to know. =]http://www.stevemeadedesigns.com/board/topic/83029-everything-you-need-to-know/ Link to comment Share on other sites More sharing options...
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