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Old 10th October 2012, 10:42 PM   #281
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markus76:
IB subs?
No, I'm still talking about a source within a room
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Old 11th October 2012, 06:46 AM   #282
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Your system sure sounds impressive ...do you mind posting some pictures to inspire others
Not at all. But I'm afraid you can't hear pictures.
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Old 11th October 2012, 08:01 AM   #283
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No. You don't avoid or prevent modal problems with dipoles. You have less output at the lowest frequencies.
Show me an untreated small room with dipoles and short decay with no ringing and resonances. They don't exist.
True. But - dipoles do trigger the room modes somewhat less, and do result in both smoother frequency response and less ringing at low frequencies - the decay is lower in level than with monopoles.

I believe this is indeed audible.
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Old 11th October 2012, 08:13 AM   #284
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True. But - dipoles do trigger the room modes somewhat less, and do result in both smoother frequency response and less ringing at low frequencies - the decay is lower in level than with monopoles.

I believe this is indeed audible.
I'm not certain that has been proven, not with the same output.
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Old 11th October 2012, 09:08 AM   #285
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I have proven it to myself on several occasions, that is good enough for me. I have no intention at all to write an AES paper on this.....

I used to be very much against dipoles, and especially dipole bass... that was until I did some measurements on dipoles vs monopoles. It was an eye-opener to say the least.

Regarding output - I have always used a "house-curve" that rises 10 dB from 200 Hz down to 20 Hz. I still have that curve now, and my dipoles are certainly able to produce significant output at 20 Hz.
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Old 11th October 2012, 09:23 AM   #286
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How many 21" drivers do you need to employ for that again?
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Old 11th October 2012, 09:29 AM   #287
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Sixteen.
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Old 11th October 2012, 09:38 AM   #288
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I have proven it to myself on several occasions, that is good enough for me. I have no intention at all to write an AES paper on this.....

I used to be very much against dipoles, and especially dipole bass... that was until I did some measurements on dipoles vs monopoles. It was an eye-opener to say the least.

Regarding output - I have always used a "house-curve" that rises 10 dB from 200 Hz down to 20 Hz. I still have that curve now, and my dipoles are certainly able to produce significant output at 20 Hz.
It's still quite subjectively. There are always manye questions that can be raised. Like for instance: Where both done with the same exact same bass treatment in the room? Where both placed optimally? Do they deliver the same SPL? Was the monopole correctly built?

Others have the opposite experience and we are just as far. I do agree though that there may be indications of experiences of dipoles being somewhat easier on rooms. But the reason may just as much have to do with less output, weakness with the building of monopoles or something else. There's nothing objectively and definity answers out there that I've seen.

What you have is pretty crazy by the way. It underlines how inefficient dipoles are.
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Old 11th October 2012, 09:45 AM   #289
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Sixteen.
SD is nearly the size of your room's floor I'd think a double bass array would have been more practical with better performance. Or was "stereo bass" one of the design goals?
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Old 11th October 2012, 10:00 AM   #290
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Stereo is definitely necessary since I XO at 200 Hz.
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