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Old 14th January 2011, 09:00 AM   #11
LineArray is offline LineArray  Germany
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The wood cone speaker in the above picture
is mounted wrong IMO.

The propagation of bending waves is faster along
the fibers, so the cone breakup and some widening
of the dispersion occurs predominantly orthogonal
to the fibers.

Thus the fibers should be oriented vertically to
have increased horizontal dispersion.

Strange thing, that a manufacturer does not
understand his own product ...
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Old 14th January 2011, 12:21 PM   #12
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by fatbattery View Post
Me finks he getting a bit carried away. world first I dont think soo.Rullit RF-C805 proper one. I have seen preetier but I canny remember where.
This Rullit 15 inches field-Coil fullrange driver are real impressive. Do you know the price ??
Gustavo
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Old 14th January 2011, 01:52 PM   #13
DYNABLASTERTUNERS is offline DYNABLASTERTUNERS  Serbia
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It was on ebay for about 3000$ I think
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Old 14th January 2011, 01:52 PM   #14
Bob Brines is offline Bob Brines  United States
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Quote:
Originally Posted by THORNSPAWN View Post
"To recreate the sound of instruments played in a concert hall, speakers should be designed as though they were actual musical instruments....
I think not. The sound of the instruments and hall are already on the CD/record. The speaker, and indeed the entire processing chain should be absolutely transparent. And sounds added by the reproducer corrupts the sound of the recording.

Bob
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Old 14th January 2011, 02:08 PM   #15
LineArray is offline LineArray  Germany
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Quote:
Originally Posted by Bob Brines View Post
I think not. The sound of the instruments and hall are already on the CD/record. The speaker, and indeed the entire processing chain should be absolutely transparent. And sounds added by the reproducer corrupts the sound of the recording.

Bob
I agree to the goal Bob,

unfortunately "perfect transparency" is difficult to
achieve.

There is cone breakup in every driver - fullrange or
not - and typically the modal overlap of a driver
is even lower than that of a musical instrument
e.g. a violin, when driven in the range of cone
breakup.

There are only 2 ways to perfect or nearly perfect
transparency:

- Assure pistonic motion of membrane(s) over
whole audible frequency range

or

- Make a bending wave loudspeaker with
extremely high modal overlap


Currently available loudspeaker designs are
"non transparent" IMO.

Kind Regards
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Old 14th January 2011, 02:10 PM   #16
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by DYNABLASTERTUNERS View Post
It was on ebay for about 3000$ I think
GULP! This is expensive, but not astronomical price, for the driver looks awesome well made, Iam sure it had a great sound.
Thanks for the info.
Gustavo
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Old 14th January 2011, 08:31 PM   #17
fatbattery is offline fatbattery  Australia
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Quote:
Originally Posted by chlorofille View Post
Another nice wood cone fullrange speaker.
HR124B8-10L full range speaker
looks flat on paper I would want a tweeter.
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Old 14th January 2011, 08:55 PM   #18
fatbattery is offline fatbattery  Australia
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Quote:
Originally Posted by Bob Brines View Post
I think not. The sound of the instruments and hall are already on the CD/record. The speaker, and indeed the entire processing chain should be absolutely transparent. And sounds added by the reproducer corrupts the sound of the recording.

Bob
I agree the speaker is a musical instrument bit seems far fetched. speakers shouldnt sound at all if possible.Speakers should grow from the earth as inert rocks. I guess rocks are hard to grow and comprimises must be made. I suppose a wooden cone would play a violin peice without drawing attention to its self. But what about brass. Should we pull out brass horns for those
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Old 14th January 2011, 08:57 PM   #19
fatbattery is offline fatbattery  Australia
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I guess natral fibres and materials and strongest lightest least resonant materials on earth
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Old 14th January 2011, 09:03 PM   #20
fatbattery is offline fatbattery  Australia
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That vinatge rcf was worth a fortune before he started modding it. He is selling all his experiments currently as he raising money for his first small production run of celulose coned feild coils. Who can really know how they sound with out hearing them. But he does have a large group of like minded enthusists in his club.
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