Why 2nd Order Is best or not

[markus76]

"Any sufficiently advanced technology is indistinguishable from magic." 😉

 

[Pano]

It's like those ads we see all over the place. "Use this one stupid trick for crossovers."

 

[OnAudio]

well, well, no one took a stand and said yes or no with justification😀

 

[OnAudio]

Without an expert opinion from you guys I have now resulted in supporting my claims using external sources

These guys cross at 380Hz
| Naim Audio

 

[OnAudio]

Its now official there are magical crossover frequencies, now we move onto gentle cues 😀

 

[vacuphile]

Without an expert opinion from you guys I have now resulted in supporting my claims using external sources

These guys cross at 380Hz
| Naim Audio

There is no magic frequency, it all depends on the system you are designing.

To support your claims by using external sources, without scientific reasoning or any other form of rationality, gets darned close to both religion and politics, both forbidden topics on this forum.

vac

 

[AllenB]

Are they 🙁 but I wanna extra crossover point.

 

[OnAudio]

There is no magic frequency, it all depends on the system you are designing.

To support your claims by using external sources, without scientific reasoning or any other form of rationality, gets darned close to both religion and politics, both forbidden topics on this forum.

vac

This is just an assumption:

At that crossover point the low end will not sound good. It is still contaminated by high frequency elements, that the ear is sensitive to.

A system that has a crossover at around 300Hz should sound good.

http://upload.wikimedia.org/wikipedia/commons/4/47/Lindos1.svg

Yes every driver has a suitable range. However I currently hold the position that, if you want to play music on a fullrange driver, high pass it at 300Hz.

If you want to have clean bass low pass it at 300Hz or lower.

If you want to cover 20Hz to 20kHz using a two way. Get a woofer and low pass it at 300Hz. Add a fullrange and high pass it at 300Hz. The result should be naturally pleasing.

Approach 3:
Pick 300Hz as a partitioning frequency

300Hz/7 = 42Hz
300Hz *7 = 2100Hz
2100Hz*7 = 14700Hz
We get sloppy and end up with a three way system

Driver 1 : 20Hz - 300 Hz
Driver 2 : 300Hz - 2.1kHz
Driver 3 : 2.1kHz - 20kHz
We decide to isolate the male voices so that we can have a deep grunt woofer, we end up four way

Driver 1 : 20Hz - 100 Hz
Driver 2 : 100Hz - 300Hz
Driver 3 : 300Hz - 2.1kHz
Driver 4 : 2.1kHz - 20kHz (The high frequency driver is covering too much, but the secret, is there recorded material at these high frequencies ?)

This is the approach used by these guys Flagship Hi-fi Speakers - Muon - Fact Sheet - Muon - Muon - KEF United States

 

[OnAudio]

Todays Quiz

I propose that the microphone captures incomplete information. If the waveform captured is reproduced, we are not guaranteed that it will have the same propagation pattern or behaviour. That is why we need to give it gentle cues about its true form.

The bird in a snow covered field can also be modeled .

I made a proposal and no one raised a contradiction, as such we move on.

Question 1.

Kindly contribute ideas on how speaker designers have been able to incooperate the gentle cue in their speakers design with examples ?
(20 points)

 

[OnAudio]

In nature the most occuring systems are vented enclosures and open baffles.

Human beings and most animals could be modeled as vented enclosures with an adjustable tuned port. Guitars and many stringed instruments also fall into this category of vented enclosures.

A harp among others could be modelled as open baffle.

Thus a sytem that is focused on proper mimicry will employ a variety of technics.

Any ideas 😉 ?

 

[Pano]

What is the point of all this? Is there a point?

 

[OnAudio]

What is the point of all this? Is there a point?

Do it! Maybe you will succeed where everybody else failed for the last 80 years. Good luck.

If you know what "gentle cues" are needed then do it. Virtually everybody interested in high quality audio reproduction would buy your speaker.
But then again, is it desirable to listen to a symphony orchestra with the acoustic signature of your living room, even if it would sound real? I suppose Beranek would disagree.

 

[tinitus]

please post something other than just quotes


moderation

 

[tvrgeek]

Any ideas 😉 ?

No need for anyone to move on here. This thread worked it's way to death.
There are no "magical" frequencies, only ones that work well with the components selected for the design goals in mind.

Second order is best only if that meets the design goals and the components specified.

This is all that should have been said 200 posts ago. End of thread. I only bother with a comment while I am letting my shop cool off. My drivers came today for my next project.

 

[Moderation Team]

This thread has run its course and is now closed.