Impedance compensation Fane Sovereign 12-250TC

[globalplayer]

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:

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?

 

[planet10]

What is your amp?

dave

 

[globalplayer]

This one (Sure Wondom TAMP 2400 MKII) :

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

An externally hosted image should be here but it was not working when we last tested it.

 

[planet10]

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

 

[globalplayer]

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.

 

[planet10]

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.

dave

 

[globalplayer]

OK. I see.
I will happily ignore it then.

 

[globalplayer]

Wait...
will it make a difference even on low impedance amps?

 

[planet10]

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

 

[norman bates]

For a full range driver, the impedance is pretty flat.

 

[globalplayer]

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

OK.
I think I get it.

Let`s say I got a 4 ohms amp.
Now I take a few speakers wire them parallel to around 2 ohms.
And connect them to the amp.

It is not ideal and of course I won't run it full blast.
In this scenario it will make a difference if speaker impedance is compensated.

But a 4 ohms speaker on a 4 ohms amp,
and a 8 ohms speaker on a 4 ohms amp for example is negligible.