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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 20th October 2019, 08:07 PM   #3761
GM is offline GM  United States
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OK, what type of distortion is when drivers are emanating same/similar frequencies from different areas of the diaphragm?

Yes, but the point is to be able to stiffen a much larger area of the diaphragm to a higher frequency before it's no longer pistonic to keep from the above happening, or at least much reduced.

GM
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Old 20th October 2019, 11:48 PM   #3762
gedlee is offline gedlee  United States
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Originally Posted by GM View Post
OK, what type of distortion is when drivers are emanating same/similar frequencies from different areas of the diaphragm?

GM
That would be "linear distortion", a frequency response change.
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Old 21st October 2019, 12:19 AM   #3763
GM is offline GM  United States
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OK, thanks! But having a driver stay linear to a much higher frequency reduce IMD?

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Old 21st October 2019, 06:48 AM   #3764
AllenB is offline AllenB  Australia
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You might get 'non-linear distortion' with the suspension, the amp and the speaker motor, and a few others.
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Old 21st October 2019, 08:08 AM   #3765
phase_accurate is offline phase_accurate
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But having a driver stay linear to a much higher frequency reduce IMD?
There is some truth in this. While breakup does not cause the nonlinearities by itself it can boost the HD and IMD products caused by the motor noinlinearities.

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Charles
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Old 21st October 2019, 11:25 AM   #3766
camplo is online now camplo
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Originally Posted by gedlee View Post
What is known is that linear phenomena such as diffraction becomes more audible at higher SPLs which can also be heard as "dynamic contrast" and which, based on my research, is more likely to be the issue.
Wheres the data that shows that increases in diffraction results in the higher contrast of dynamics?
I'm starting to think the lack of IMD within a system is a strong factor for the subject since a driver has such small excursion vs output, within a proper horn system...
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Old 21st October 2019, 12:49 PM   #3767
phase_accurate is offline phase_accurate
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http://www.gedlee.com/Papers/AES06Gedlee_ll.pdf

Quote:
I'm starting to think the lack of IMD within a system is a strong factor for the subject since a driver has such small excursion vs output, within a proper horn system...
The lack of nonlinear distortion is usually leading to lower subjective loudness perception - until you try to talk to the one sitting next to you …..


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Charles

Last edited by phase_accurate; 21st October 2019 at 12:53 PM.
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Old 21st October 2019, 01:17 PM   #3768
krivium is offline krivium  France
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Originally Posted by camplo View Post
Wheres the data that shows that increases in diffraction results in the higher contrast of dynamics?
I'm starting to think the lack of IMD within a system is a strong factor for the subject since a driver has such small excursion vs output, within a proper horn system...
This is one of the reason you see inwall monitors in big control rooms ( low diffraction, second main reason is the gain in low end as situation about BSC is inverse, you gain up to 6db for low end from 200hz approximately) and multiway system ( lower imd amongst other).
The one in the link below is a 4 way, all Tad drivers ( 2x15"+ 2x12"+ TH+ Et) i can't remember the xover points but the Et was used to get rid of the bad breakup of the 2" cd.
The low end is mono iirc. All driven by Bryston amps and BSS active filtering ( last time i visited the place it may have changed since). The CR is HUGE and the picture doesn't render the space well ( the desk is almost 5meter width).

Google Image Result for https://www.innamoramento.net/fichiers/galeries/annuaire/65183.jpg

The sound is not bad and can be very LOUD but it is more impressive looking than it sounded good to me.
The main issue being the SSL 9000j which make comb filter heaven at listening position.

Last edited by krivium; 21st October 2019 at 01:34 PM.
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Old 21st October 2019, 02:21 PM   #3769
whgeiger is offline whgeiger  United States
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1) Size is a principal determinant of a compression drivers cost, and output capacity at its low frequency bound. Also in this region, the suspension, has modes of its own.

2) The diameter of the moving sub-system is not the sole nor principal determinant of its high frequency response. Geometry and material(s) used, are far more important. WHG

3) To the exclusion of 1) above, equivalent HF performance may be achieved using diaphragm diameters ranging from 1.5" to 5".

WHG
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Old 21st October 2019, 02:31 PM   #3770
phase_accurate is offline phase_accurate
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…. and this is refering to which post ???

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Charles
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