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 Impedance plot gremlins
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Joined: Sep 2012
Posts: 1,037 Likes: 69
connoisseur
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OP
connoisseur
Joined: Sep 2012
Posts: 1,037 Likes: 69 |
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.
Last edited by Hellcommute; 11/24/13 02:21 AM.
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 Re: Impedance plot gremlins
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
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.
-----------------------------------
Enjoy the music, not the equipment.
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Re: Impedance plot gremlins
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Joined: Sep 2012
Posts: 1,037 Likes: 69
connoisseur
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OP
connoisseur
Joined: Sep 2012
Posts: 1,037 Likes: 69 |
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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Re: Impedance plot gremlins
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Joined: Mar 2001
Posts: 1,387 Likes: 8
President connoisseur
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President connoisseur
Joined: Mar 2001
Posts: 1,387 Likes: 8 |
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.
Ian Colquhoun
President & Chief Engineer
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Re: Impedance plot gremlins
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Joined: Sep 2012
Posts: 1,037 Likes: 69
connoisseur
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OP
connoisseur
Joined: Sep 2012
Posts: 1,037 Likes: 69 |
Hi Ian, thanks for clearing that up. Too weird to see that trend! It makes sense now though. 
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