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Old 11th October 2012, 09:02 AM   #291
Omholt is offline Omholt  Norway
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StigErik:
Do you have a waterfall and burst decay of your present setup that you can show? And also from monopoles in the same room?
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Old 11th October 2012, 09:09 AM   #292
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I have one from the dipole setup yes. Woofers only.

The first "ridge" is the speakers alone, and the later and lower in level is the room decay.

It does not look like this at all with monopoles, and there is only one decay "ridge".
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Old 11th October 2012, 09:15 AM   #293
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Monopole response in the same room. Different speaker and no EQ, but it shows how the decay behaves differently than with dipoles.
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Old 11th October 2012, 09:25 AM   #294
lolo is offline lolo  France
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Quote:
Originally Posted by Omholt View Post
It underlines how inefficient dipoles are.
sure, if that was to be the only trade off, I would be happy with that.

I also hope we lead this thread to a conclusion this time!
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Old 11th October 2012, 09:32 AM   #295
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I don't worry when it comes to efficiency. Amp power and cone area is fairly cheap. But of course it will occupy a significant part of the room... not very wife-compatible!
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Old 11th October 2012, 09:51 AM   #296
Omholt is offline Omholt  Norway
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Thank you for posting that.
The response is much more even with the dipoles. Below 50 Hz a shorter decay too, but not much difference and this could change with moving the mic/position some. Above 50 Hz the decay is shorter with the monopoles. Are the subs crossed low?

But here's something that makes me wonder about the measurement with the monopole. You have a resonance at around 5kHz that's about as strong at the one at 50Hz. Considering you have a very dampened room, this shouldn't be so.
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Old 11th October 2012, 09:56 AM   #297
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XO is 200 Hz for the dipoles.

The monopole is an unfiltered speaker. The 5 kHz thing is a cone breakup resonance.

Yes, the decay is actually worse between 100 and 200 Hz. This observation has been made by others in this thread before if I remember correctly.
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Old 11th October 2012, 10:05 AM   #298
Omholt is offline Omholt  Norway
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When it comes to decay and resonances I would say the monopoles performs overall better. They are noticeable better between 70-200 Hz. The frequency response is clearly improved with the dipoles. Would be interesting to see what change of placements of both subs and sitting postion would do.
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Old 11th October 2012, 10:12 AM   #299
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The difference is not what it seems, because the overall response from the monopole is uneven, and this affects the level of the decay as well. It may look like the decay is lower, but this is only because the speaker level is also lower. It would have been easier to compare the two if the monopole was EQ'ed to a flat response.

One other thing is that the dipole room decay starts at a level 15-20 dB below the speaker, while the monopole starts at the same level as the speaker.
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Old 11th October 2012, 10:22 AM   #300
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Originally Posted by Wavebourn View Post
Not at all. But I'm afraid you can't hear pictures.
Thanks Wavebourn.

BTW, why do you prefer arrays over single very high efficiency drivers, when comparable SPL can be reached by both in the home environment with no possibility comb filtering with the single driver. Unless you say that you used multiple high efficiency drivers in the array !!
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