Dayton Audio PA380-8 15" Pro Woofer impedance spike at 40hz

[awdtalon21]

Why does this Dayton Audio PA380-8 15" Pro Woofer have an impedance spike of 300 around 40hz? When designing the crossover is there a way to get the spike down, or does it even matter?

thank you.

 

[Pano]

It doesn't matter. All woofers have a peak at their Fs. Put it in a bass reflex box and you'll have two peaks. 🙂

The peak won't effect your crossover unless you are crossing very, very low. You aren't, are you?

 

[daemonsgr]

maybe read these: (`I did too as I was gathering knowledge)

The Crossover Design Cookbook Chapter 3: Speaker Motors and Crossovers

TA Speaker Topics - Neutralizing L(e) with a Zobel

Of course following what Pano said.

 

[GM]

The peak won't effect your crossover unless you are crossing very, very low.

In which case one needs a series notch filter 😉: Series Notch Filter Designer / Calculator

GM

 

[John Busch]

Actually, the resonance peak is around 32 Hz. Nothing to worry about. Have purchase quite a few and they, so far, have been very consistent and very close to spec.

The peak is of little or no concern when properly used in either a vented or sealed box. Can even be used in an open baffle. How do you intend to use this driver?