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Multi-Way Conventional loudspeakers with crossovers

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Old 10th November 2012, 01:51 AM   #741
Pano is offline Pano  United States
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Quote:
Originally Posted by Charles Darwin View Post
I wonder how many dome tweeters stay below those THD levels when you feed them the 100-200W necessary to reach those SPL levels.
Most of them, I'm sure. After a brief flash and puff of smoke, of course!
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Old 10th November 2012, 02:41 AM   #742
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If they are within xmax and the average power delivered is low enough so that they don't fry, it'll be reasonably low. Dome tweeters do fairly well with high SPLs as do most hifi drivers, the trouble comes when they are expected to keep it up for extended periods of time, then things melt.

There are some examples here

Zaph|Audio - Design Contest Results
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Old 10th November 2012, 08:07 AM   #743
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Flavio and deward. You guys know the digital domain. Passives arent obsolete '78 tech, and you both know that too. It is merely the origin of all filter topology. How do you filter the input to ADC? Passively. Many passives used in DSP too, prior to digi filters.
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Old 10th November 2012, 11:25 AM   #744
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Originally Posted by Pano View Post
.............Very steep filters, ..................fail to convince me sonically. ........
what do you mean by very steep?
3, 4 & 5pole or 8pole to 18pole?
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Old 10th November 2012, 11:29 AM   #745
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Why?
a 110dB compression driver with a 10mW signal is comparable in output level to a 90dB cone driver with 1W. Both will give ~90dB SPL @ 1m
Quote:
Originally Posted by Barleywater View Post
high loudness studio monitors = deaf engineer = poor mix.

Please show me something better than results in High Frequency Compression Driver Evaluation thread:




These are post 1980 drivers. 4%-10% 2nd harmonic is not natural or reasonable for high fidelity, and whatever a "pure amplifier" is, it's not going to fix this.
What is mechanism for "pure" amplifiers elimination of driver distortion?

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Andrew
I asked and you gave this?
Quote:
02dsHi+6 108.4 dB, 4% 2ndHD
Does that answer?
I don't even know what that is telling me.
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Old 10th November 2012, 12:15 PM   #746
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Today's my day to go active with my JBL cinema speakers (4622). I bought three Crown DSi 1000's. These have the preset crossovers for my speakers. Can't wait to see what improvements I get vs. passive.
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Old 10th November 2012, 12:20 PM   #747
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I can guarantee at least one result:

It will sound very different from using one amplifier with all three drivers attached in parallel across the amps output terminals.
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Old 10th November 2012, 12:40 PM   #748
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Originally Posted by AndrewT View Post
I asked and you gave this?
Does that answer?
I don't even know what that is telling me.
It is line from results post showing 2nd harmonic of 4% when output is 108dB for a particular compression driver. It is an excellent predictor that IMD products from driver when fed two tone stimulus will be audible as well the 2nd harmonic. Loud yes, high fidelity, not in my opinion.

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Andrew
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Old 10th November 2012, 12:51 PM   #749
AndrewT is offline AndrewT  Scotland
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Quote:
02dsHi+6
is a compression driver description.
and is there a comparable result for a cone driver to show us?
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Old 10th November 2012, 01:14 PM   #750
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what do you mean by very steep?
Mostly I mean near brick wall, the kind that are only practical in DSP. But generally most above 6th order electrical.
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