Impedance rise measurement

[Cabin_Pressure 10+ year member]

What is the most accurate method of testing peak imp rise?

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[mrogowski 5,000+ posts]

If you have 15-30k you can get yourself a B&K setup that will provide very accurate results for what you are after.

OR...

You can do things on the cheap by connecting an amp to the outputs of your computer sound card and running your speaker from the amp with a 100 Ohm resistor in series with it. Download sine wave generator software or WinISD Pro which has a generator built in. You can then measure the voltage across the resistor with a multimeter, as you sweep the different frequencies. This will give you an indication of the impedance peak. This method is as accurate as the response curve of your sound card, amp, and the error correction of your meter.

 

[jdawg 5,000+ posts]

what about this? http://www.parts-express.com/pe/pshowdetl.cfm?Partnumber=390-804

 

[mrogowski 5,000+ posts]

Yeah, that would work too //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[jdawg 5,000+ posts]

Yeah, that would work too //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

i thought about buying it, really for no reason cause i probably would use it once lol

 

[etznova 10+ year member]

that won't help you with figureing out box rise

 

[mrogowski 5,000+ posts]

that won't help you with figureing out box rise

It would if you have the driver mounted in the box, unless there's a magic unknown impedance rise I'm unaware of.