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#398808 - 11/23/13 09:21 PM Impedance plot gremlins
Hellcommute Offline
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Registered: 09/23/12
Posts: 152
Why in almost every axiom speaker measured is there a notch in the impedance plot right at 1khz? M60's plot are a good example of what I mean.


Edited by Hellcommute (11/23/13 09:21 PM)

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#398810 - 11/23/13 09:47 PM Re: Impedance plot gremlins [Re: Hellcommute]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10621
Slight wrinkles in the lower mid-range impedance curves are said(see Stereophile speaker reviews which often comment on this)to indicate enclosure resonances at those points. This may not have any audible effect.
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#398811 - 11/23/13 09:56 PM Re: Impedance plot gremlins [Re: Hellcommute]
Hellcommute Offline
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Registered: 09/23/12
Posts: 152
Thanks John, that's what I thought. Kinda important place at the start of the presence region. It seems every model is affected by this. Could it be a port issue? Seems that's one thing all models may have in common.

From lfr to m2.... They all have it. Hmmm.

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#398816 - 11/24/13 12:47 AM Re: Impedance plot gremlins [Re: Hellcommute]
Ian Offline
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Registered: 03/13/01
Posts: 1142
Hi Hellcommute,

Good eye to see that little blip. It is actually an LMS bug. You can see it at 100 Hz, 1 kHz, and 10 kHz in all impedance graphs. You need a really good eye for the one at 10 kHz.
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#398824 - 11/24/13 10:01 AM Re: Impedance plot gremlins [Re: Hellcommute]
Hellcommute Offline
veteran

Registered: 09/23/12
Posts: 152
Hi Ian, thanks for clearing that up. Too weird to see that trend! It makes sense now though. smile

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