Constant Voltage Impedance Measurement

Gcollier · 28th June 2006, 12:20 PM

Does anyone have a good source of info on constant voltage impedance measurements. I've always used the constant current method, but would like to try constant voltage. Any links or schematics would be most helpful.

G.

richie00boy · 28th June 2006, 01:13 PM

If you are prepared to offer a bit of feedback, email me your email address and I will send you a document I have written.

Davey · 28th June 2006, 01:20 PM

Here's one that pops to mind:

http://www.t-linespeakers.org/tech/c...rer/index.html

Davey.

Svante · 28th June 2006, 07:10 PM

Why do you find that interesting?

IMO there is no difference between the two (if I understand what you mean correctly) possibly apart from noise sensitivity (which normally isn't an issue).

Gcollier · 28th June 2006, 07:59 PM

Quote:

Originally posted by Svante
Why do you find that interesting?

IMO there is no difference between the two (if I understand what you mean correctly) possibly apart from noise sensitivity (which normally isn't an issue).

Well...I'm interested in adding some drivers to LEAP using their LTD model which requires that the drivers be measured with a constant voltage rather than constant current (you need a voltage curve and an impedance curve).

G.

Svante · 28th June 2006, 09:06 PM

Quote:

Originally posted by Gcollier

Well...I'm interested in adding some drivers to LEAP using their LTD model which requires that the drivers be measured with a constant voltage rather than constant current (you need a voltage curve and an impedance curve).

G.

Ah, ok. Well Leap is as I understand it pretty advanced, so maybe they have good reasons for that.

forr · 28th June 2006, 09:53 PM

See d'Appolito's book. No real difference between constant current, constant voltage or constant resistance as long as the domain remains small signals.

Svante · 29th June 2006, 09:54 PM

Quote:

Originally posted by forr
See d'Appolito's book. No real difference between constant current, constant voltage or constant resistance as long as the domain remains small signals.

Yes, that is my thinking too, but here the software obviously required a specific format of input, so that would be a good reason to make the measurements as required.

28th June 2006, 12:20 PM	#1
Gcollier diyAudio Member Join Date: Mar 2003 Location: Windsor	Constant Voltage Impedance Measurement Does anyone have a good source of info on constant voltage impedance measurements. I've always used the constant current method, but would like to try constant voltage. Any links or schematics would be most helpful. G. __________________ If you take something apart and put it back together again enough times, eventually you will have two of them.

28th June 2006, 01:13 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	If you are prepared to offer a bit of feedback, email me your email address and I will send you a document I have written. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

28th June 2006, 07:10 PM	#4
Svante diyAudio Member Join Date: Feb 2004 Location: Stockholm	Why do you find that interesting? IMO there is no difference between the two (if I understand what you mean correctly) possibly apart from noise sensitivity (which normally isn't an issue). __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge

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28th June 2006, 01:20 PM	#3
Davey diyAudio Member Join Date: Dec 2001 Location: Bremerton, WA.	Here's one that pops to mind: http://www.t-linespeakers.org/tech/c...rer/index.html Davey.

28th June 2006, 09:53 PM	#7
forr diyAudio Member Join Date: Dec 2004 Location: Next door	See d'Appolito's book. No real difference between constant current, constant voltage or constant resistance as long as the domain remains small signals.

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