Active vrs passive

[MiiB]

In the cross-over region they share the same current. Because of that the blend does not drift with amplitude. like it would if you separate the drivers in parallel or active crossovers.

Good link... read the graphs and understand why the changes in the mid/base is reflected into the tweeter.

[planet10]

Chris,

In a series XO, the value of every component, including the driver, affect the functioning of every other part. So if a part shifts (as under dynamic conditions) then this shift is reflected in the function of every other component.

Series XOs are less common than parallel, as they get much harder to do as the order increases past 1st order (since the change in one component affects every other component).

dave

[MiiB]

Dave.... You can't make series crossovers with domes or any mass loaded tweeters. Ribbons and planars does not have low freq resonance and will work perfectly in serial crossovers

Other tweeters will get too loaded at their resonance and thus get destroyed.

[James Lehman]

Let's get real here for a moment!

The fact that we need any kind of crossover is because it is very difficult to make a single driver speaker system that covers the entire range of audio. Right?

So not matter what method you use, if you are making a speaker system with multiple drivers to cover different parts of the audio range, you are compromising!

There is no such thing as a perfect speaker!

It's all a compromise!

If there was such a thing as the de-facto perfect system, we would not be having any of these conversations. There would be only one way to do it.

James.

[planet10]

Originally Posted by MiiB

Dave.... You can't make series crossovers with domes or any mass loaded tweeters. Ribbons and planars does not have low freq resonance and will work perfectly in serial crossovers

Series XOs are not without their issues. DaveR (considered a master series XO designer in this corner of the world) would disagree with you on the use of domaes at least.

My modest efforts put the XO <400 Hz, have been 1st order, have very careful driver choice, and deal with mid-tweeter resonance peak acoustically. We have achieved outstanding performance at a modest price.

dave

Originally Posted by James Lehman

There is no such thing as a perfect speaker!

It's all a compromise!

If there was such a thing as the de-facto perfect system, we would not be having any of these conversations. There would be only one way to do it.

This is indeed true. I estimate that even the very best speakers are 10% of the way to "perfect". The art of loudspeaker design is in choosing a set of compromises. And since different people best tolerate different mixes of compromises, one can have equally valid speakers that sound quite different.

dave

[Pano]

Originally Posted by James Lehman

If there was such a thing as the de-facto perfect system, we would not be having any of these conversations. There would be only one way to do it.

Was anyone claiming otherwise?

[tinitus]

I clearly remember my teacher saying, series xo are mostly always good, mostly never really bad, but never really good either

sorry I said that
guess I can blame him for avoiding all designs using series xo

makes me wonder ..... active series xo.....

Originally Posted by James Lehman

There is no such thing as a perfect speaker!
It's all a compromise!

I don't about that
wouldn't it depend on who you are, and what you expect of a speaker ?

[James Lehman]

OK. So let's hear some ideas about what a "perfect speaker" would be!

Forget about reality and the limits of real physical things.....

Just go full on pie-in-the-sky!

What is perfect?

James.

[MiiB]

series XO's relies on really good drivers..If you don't have the ingredients you can't cook anything worth eating.

No such thing as the perfect speaker, but you can weight and select your compromises so what it brings out is so natural that it may fool you to believe it's the real deal.

[tinitus]

perfect is usually very boring