How do I reduce a system impedance peak?

[jamikkim]

I've designed this crossover based on Zaph's FR graph for the Dayton rs100-4, but had to use the manufacturer's FR for the Vifa 0x20sc-4, as Zaph hasn't tested it.

So far the response with BSC in the LP/HP values is nice, although there is a peak in the system impedance. Will this make the mids muddled?

Bottom right, first picture: How do I reduce the peak without changing FR too much?




Edit: The pictures used to be bigger, I may need to upload them somewhere else...

[ocool_15]

Re: How do I reduce a system impedance peak?

Why would you want to get rid of the peak? The pictures are rather small but it should basically be at the crossover point or a bit below. Your electrically limiting the amount of power going to the drivers in this region. If you try deleting all values in your crossover you should show a large peak in the frequency response where the drivers overlap and the peak in impedance will be gone in that region, that would just gives you an idea as to why its there.


Lorne

[jamikkim]

Re: How do I reduce a system impedance peak?

Sorry, I'm fairly new to this kind of thing...:o

[Pete Schumacher]

Re: How do I reduce a system impedance peak?

Sorry, I'm fairly new to this kind of thing...:o

No need to reduce the impedance peak, unless your amp has a very high output impedance (some tube amps). Otherwise, not an issue.

[Jeff B.]

Re: How do I reduce a system impedance peak?

A peak in the impedance near the crossover point is typical for in-phase crossovers where the drivers are 6dB down at the crossover point. This is the way is should look.