How to check impedance load using Vmeter

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=72289
Printed Date: May 21, 2024 at 3:51 AM

Topic: How to check impedance load using Vmeter

Posted By: groggy23
Subject: How to check impedance load using Vmeter
Date Posted: February 06, 2006 at 12:12 PM

Title says it. I just want to check the impedance load from my subwoofer to make sure that it is in fact 4 ohms.

Replies:

Posted By: kirktcashalini
Date Posted: February 06, 2006 at 1:14 PM

just plug it 200ohm scale, or maybe even the ->+

-------------
99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)

Posted By: stevdart
Date Posted: February 06, 2006 at 8:59 PM

Disconnect it from the amp, and use the resistance scale to get a reading under 10. You'll get a DCR reading, which is lower than impedance (due to the compex nature of impedance). If you get 3.-something, it's a 4 ohm impedance. And the curve changes...like often an 8 ohm speaker will read something like 5.8 ohms, and a 2 ohm speaker might read 1.6 ohms. But you get the idea.

-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: groggy23
Date Posted: February 06, 2006 at 9:03 PM

^got it... thanks. :)