dtbrown Posted April 28, 2009 Report Share Posted April 28, 2009 I'm trying to help a guy and he is running 18" DC level 4 xl's in a box that is around 8-10cf from the looks of it. Regardless of your sub size on average what do you guys see impedance rise wise? 2x 3x 4x times? I understand impedance rise has a lot of variables but I just need to see on average what you guys are getting when you test. Thanks, Link to comment Share on other sites More sharing options...
Eric B Posted April 28, 2009 Report Share Posted April 28, 2009 lemme check tomorrow.. my box is 6.5cubes after displacement and im wired for 2 ohm soo ill check tomorrow for ya 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals Link to comment Share on other sites More sharing options...
dtbrown Posted April 28, 2009 Author Report Share Posted April 28, 2009 lemme check tomorrow.. my box is 6.5cubes after displacement and im wired for 2 ohm soo ill check tomorrow for ya Sweet. I assume you have a single 18. Thanks, Link to comment Share on other sites More sharing options...
Eric B Posted April 28, 2009 Report Share Posted April 28, 2009 Sweet. I assume you have a single 18. Thanks, well im sittin at 2.2 ohm today so jus a lil rise.. not bad for wiring it at "2ohm" 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals Link to comment Share on other sites More sharing options...
Noobtastic14 Posted April 28, 2009 Report Share Posted April 28, 2009 My resistance has always been within a tenth or two, never took a hot measurement of impedance -Drew I am a United States Military Arts and Crafts Professional. Sand it off, Paint it on. uhoh_45 said: dont be a pussy P give the jeep to drew Link to comment Share on other sites More sharing options...
Dan. Posted April 28, 2009 Report Share Posted April 28, 2009 well im sittin at 2.2 ohm today so jus a lil rise.. not bad for wiring it at "2ohm" That is not rise.... its DC resistance Rise is measurd when you burp it will be different depending on: frequency, subwoofer, enclosure etc Measure the current and voltage from the amps at your burp frequency. Divide the voltage by the current, that gives you the impedance. Subtract the standing impedance of the system and you have the rise. Current Build Log [¦¦¦¦¦-----] 50% Complete Link to comment Share on other sites More sharing options...
dtbrown Posted April 29, 2009 Author Report Share Posted April 29, 2009 That is not rise.... its DC resistanceRise is measurd when you burp it will be different depending on: frequency, subwoofer, enclosure etc Measure the current and voltage from the amps at your burp frequency. Divide the voltage by the current, that gives you the impedance. Subtract the standing impedance of the system and you have the rise. X2. Thanks guys for effort but I was referring to impedance rise/ box rise not nominal load. But thank for trying to help me. But if anyone else has tested their DC level 4 xl's impedance rise that would help. Link to comment Share on other sites More sharing options...
Eric B Posted May 4, 2009 Report Share Posted May 4, 2009 X2. Thanks guys for effort but I was referring to impedance rise/ box rise not nominal load. But thank for trying to help me. But if anyone else has tested their DC level 4 xl's impedance rise that would help. Just tested it on Saturday.. I was wired at 2ohm but wit rise my amp was seein 8.08ohm.. so quite a bit of a jump.. amp was still doin 1200rms ar 8ohm 2007 Chevy HHR LT UNDER CONSTRUCTION 1st Place Loud N Low 2010 MWSPL Finals 3rd Place Xtreme 3 2010 MWSPL Finals Link to comment Share on other sites More sharing options...
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