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Flat impedance curve?

Hi,

How big impedance intervals can speakers have and still be considered as "flat"? I have a pair of 4 ohm speakers (Isophon Galileo) that has a maximum impedance of 10 ohm at a certain frequency and dips to 2 ohm at another. Are these speakers flat?

Can I use these speakers together with an 4 ohm tube amp or is that not a wise choice?

/Jwal
jwal

Showing 1 response by ngjockey

ngjockey
1,042 posts
 
2 ohms at 10000 Hz is not much of problem because there's not much amp draw there. 2 ohms at 100 Hz will be a problem for most amps.

I would be surprised if the maximum is 10 ohms for any dynamic driver getting near Fs.
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