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Impedance compensation Fane Sovereign 12-250TC
Impedance compensation Fane Sovereign 12-250TC
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Old 31st December 2017, 12:44 AM   #1
globalplayer is offline globalplayer  Germany
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Default Impedance compensation Fane Sovereign 12-250TC

I read a flat impedance curve is better for the amp.

So I got the Fane Sovereign 12-250TC.
It has the following impedance curve:

Click the image to open in full size.

I want this curve to be flat.

After some research I found out I can tame the upper end using a zobel circuit.
But...
what can be done about the lower end (at Fs) of the curve?
Are there any disadvantages to this approach?
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Old 31st December 2017, 01:38 AM   #2
planet10 is offline planet10  Canada
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Impedance compensation Fane Sovereign 12-250TC
What is your amp?

dave
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Old 31st December 2017, 01:48 AM   #3
globalplayer is offline globalplayer  Germany
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This one (Sure Wondom TAMP 2400 MKII) :

Sure Electronics' webstore 2 x 400 Watt Class D Audio Amplifier Board Compact - T-AMP

Click the image to open in full size.
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Old 31st December 2017, 02:52 AM   #4
planet10 is offline planet10  Canada
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Impedance compensation Fane Sovereign 12-250TC
These all most always have low output impedance (it isn’t specified) so yu have little to worry about wrt speaker impedance.

Note that in the real world this amp would be rated at 85w/channel into 8Ω.

dave
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Old 31st December 2017, 03:09 AM   #5
globalplayer is offline globalplayer  Germany
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OK.
So this makes more sense regarding tube amps I presume.

Yes, I know.
Although for this speaker (100db) it is plenty.
I think my hearing will be gone before the amp will even clip.

Thank you.
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Old 31st December 2017, 03:13 AM   #6
planet10 is offline planet10  Canada
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Impedance compensation Fane Sovereign 12-250TC
As a generalization, tube amps typically have higher output impedances, but this is not universal and many good SS amps (many PASS ones for instance) also have higher output impedance.

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Old 31st December 2017, 03:26 AM   #7
globalplayer is offline globalplayer  Germany
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OK. I see.
I will happily ignore it then.
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Old 31st December 2017, 04:35 AM   #8
globalplayer is offline globalplayer  Germany
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Wait...
will it make a difference even on low impedance amps?
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Old 31st December 2017, 05:54 AM   #9
planet10 is offline planet10  Canada
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Impedance compensation Fane Sovereign 12-250TC
An amplifier with low output impedance will largely be unaffected by changes in the impedance of the loudspeaker.

As the output impedance rises you need to start paying attention to speaker impedance. If you have a current amplifer (output impedance >> speaker impedance) you want to have a very flat impedance curve.

dave
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Old 31st December 2017, 06:04 AM   #10
norman bates is offline norman bates  United States
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For a full range driver, the impedance is pretty flat.
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