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Multi-Way Conventional loudspeakers with crossovers

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Old 16th October 2012, 12:57 AM   #391
CLS is offline CLS  Taiwan
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Quote:
Originally Posted by norman bates View Post
Hopefully your speakers have a flat resistive impedance curve.....................

Hehe... that's part of the reason why I tried it with bending wave devices. Their impedance curves are pretty flat (compared to most ordinary drivers).

Nevertheless, I think the problem of impedance curve would not be so great if the 3 drivers (with the loads) are identical. Paired drivers on hand are all measured very very close to each other.

If multi-way is used, then the problem would be mostly in the xover, I guess.
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Old 16th October 2012, 10:08 AM   #392
Elias is offline Elias  Finland
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The impedance of the drivers does not matter as the configuration is a 'star' network, which can be transformed to perhaps more familiar 'delta'

Click the image to open in full size.

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Old 6th January 2013, 08:33 AM   #393
el`Ol is offline el`Ol  Germany
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Any thoughts about this?

Inpedance linearization would have to be added, of course.
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Old 6th January 2013, 08:56 AM   #394
el`Ol is offline el`Ol  Germany
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alternatively (if output is symmetric)
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Old 6th January 2013, 12:00 PM   #395
Elias is offline Elias  Finland
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Any thoughts about this?

I think single mono tweeter leads to quite limited stereo presentation.


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Old 6th January 2013, 12:28 PM   #396
el`Ol is offline el`Ol  Germany
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The current version of the stereolith has a single tweeter.
If the old stereoliths worked like my second circuit the tweeters would have been mono with unsymmetric amps even then.
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Old 6th January 2013, 12:55 PM   #397
el`Ol is offline el`Ol  Germany
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Stereophony for both tweeters and woofers with unsymmetric amp.
If "more stereo" for the tweeters than for the woofers is desired tweeters have to be at (+).
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Old 6th January 2013, 12:56 PM   #398
Elias is offline Elias  Finland
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The current version of the stereolith has a single tweeter.
If the old stereoliths worked like my second circuit the tweeters would have been mono with unsymmetric amps even then.
Yes Stereolith (TM) indeed has single tweeter, but since when has it been considered as ultimate ? I don't think single tweeter is any good, not for imaging and not for spaciousness. It is very simple to try out.
Also I don't know why Stereolith is like it is, maybe for cost reasons.
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Old 6th January 2013, 02:22 PM   #399
el`Ol is offline el`Ol  Germany
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With version three one could test how much mono for the tweeters is tolerable.
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Old 6th January 2013, 02:57 PM   #400
Elias is offline Elias  Finland
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With version three one could test how much mono for the tweeters is tolerable.
For test purposes that may be a good idea, However I think the problem of single tweeter is not the mononess of the sound but the high spatial correlation of the single treble source which in my experience makes the source itself localisable.

I think it is better to use several tweeters (even for mono sound), or use some other methods of spatial decorrelation for example aiming the tweeters towards ceiling or side walls.


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