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Multi-Way Conventional loudspeakers with crossovers

What is Time-Alignment
What is Time-Alignment
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Old 29th December 2017, 01:51 AM   #21
Fernando R is offline Fernando R  United States
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Quote:
Originally Posted by Old'n'Cranky View Post
So if a speaker is designed and built to have perfect everything in the designers room.
It will obviously change in the customers room.
Doesn't that render some or more of the designers efforts useless ?
Most people who seriously sit down to listen, do so in reasonably similar relation to the speakers so that designing for a wide variety of circumstances is not impossible. I totally miss your point.
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Old 29th December 2017, 01:57 AM   #22
Michael Chua is offline Michael Chua  United States
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Originally Posted by Dissi View Post
What you describe is called phase alignment. Time alignment is something else. The term is used for loudspeakers applying any method to change the acoustic center of a driver, such as a tilted or a stepped baffle, a waveguide or a delay network in the crossover.

Loudspeaker time alignment - Wikipedia
Phase alignment is Time alignment. When you align the acoustic centers, the phase of the two drivers at the crossover frequency crosses perfectly.

That's why i said earlier, Time alignment, Phase alignment, Phase Coherent are all the same. Once we accept this, then it's easier to understand how to time align drivers.

If not, then how do you know when your drivers are Time aligned. How do you know the acoustic centers are aligned.
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Old 29th December 2017, 02:04 AM   #23
globalplayer is offline globalplayer  Germany
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Originally Posted by Old'n'Cranky View Post
So if a speaker is designed and built to have perfect everything in the designers room.
It will obviously change in the customers room.
Doesn't that render some or more of the designers efforts useless ?
I wouldn`t tailor a speaker to a specific room.
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Old 29th December 2017, 02:20 AM   #24
Michael Chua is offline Michael Chua  United States
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Quote:
Originally Posted by Old'n'Cranky View Post
I have a spanner to throw in here.
And for me it's an honest and serious question.

In regards to time alignment, and phase and baffle diffraction, and all the other things that everyone seems to get so, calculating, about.

In the real world, where any given room is different from everyone else's.

Do any of these alignment issues actually matter ?

Lets go a step further.
If I set up my speakers, and room, and chair, so that all parameters are perfect.
I then move the chair, isn't that then going to make the alignments etc invalid ?
It all depends on the listener. If you a casual listener, it makes no difference. However, if you are a serious audiophile, it is a huge difference. Some go to great lengths to get the best sound out of their systems, even hiring electricians to rewire their switchboard so that they have dedicated power lines to their hi-fi system.

Another example is if you are a recording engineer, having time-aligned speakers is an added advantage. There is an audible difference. It will help you do a better job.

If you are in the business of installing sound systems, you need to know about time alignment. Most of the time, it will not be about time aligning the HF to the LF drivers of the speakers itself. It has to do with speakers in different locations, minimizing comb filter effects and others. In the end, it's about making sure the sound is good. That's what the customers pay for. They are not interested in the technicalities. If the sound is bad, you won't get paid.
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Old 29th December 2017, 02:28 AM   #25
andy2 is offline andy2  United States
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Originally Posted by Michael Chua View Post
If the sound is bad, you won't get paid.
I don't know. Plenty of people paid for Sonus Faber regardless of sound.
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Old 29th December 2017, 02:46 AM   #26
Michael Chua is offline Michael Chua  United States
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Originally Posted by andy2 View Post
I don't know. Plenty of people paid for Sonus Faber regardless of sound.
hahaha..... people buy things for a lot of reasons.

I know of some rich people that have high-end systems. Ever heard of Watt-Puppies for surrounds? No kidding.

Whether he can appreciate his hifi or not, nobody dares to question. The general opinion is it is a status symbol. To the rich, status is very important.
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Old 29th December 2017, 02:50 AM   #27
andy2 is offline andy2  United States
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To the rich, status is very important.
Oh, don't forget ego, vanity and hubris. I think they are even more important.
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Old 29th December 2017, 02:58 AM   #28
nigelwright7557 is offline nigelwright7557  United Kingdom
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Some people are only happy if they pay through the nose for items.
Well if it is expensive it must be good !

In the UK we have Dyson who make amongst other things Hoovers.
They charge about 250 for a Hoover.
I can buy a none Dyson hoover in my local store for about 50.

Dyson do very well. They are based a lot on hype about their products being more powerful and leading edge. What they don't say is there are hundreds of failed and refurbed items on ebay.
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Old 29th December 2017, 03:09 AM   #29
globalplayer is offline globalplayer  Germany
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Dyson is overpriced crap.
The Bose of the hoover world.
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Old 29th December 2017, 03:14 AM   #30
andy2 is offline andy2  United States
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Dyson is overpriced crap.
The Bose of the hoover world.
How can "crap" be overpriced? I'll pay anything for crab.
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