As steve proposed a thread about .. cone break up .
First simply explained how the loudspeaker works .
The music signal is a varying alternating current/voltage , this creates a changing magnetic field in the voice coil .
Together with the permanent magnet in the speakerunit this is "" the motor"" of the membrane .
The voice coil gets attracted and distracted/reppeld to/from the permanent magnet.
A LS unit is optimised for a certain freq area in the case of a (metal )dome tweeter for example 2,5 khz -20 khz http://www.seas.no/index.php?option=com_content&view=article&id=76&Itemid=100
this graphic shows a metal dome with break up at around 20 -30 - 40 khz , metal can break up quite drastic but the units keep getting better , berylium is an example http://www.scan-speak.dk/datasheet/pdf/d3004-664000.pdf hardly any violent break up there
When a cone breaks up its not able to follow the music signal accurately anymore and starts to make uncontrolled swings .
Same goes for bass units(or mid units) made of hard materials / metal in this case aluminium , they can also break up quite drastic , example aluminium versus paper http://www.scan-speak.dk/datasheet/pdf/26w-4867t00.pdf
http://www.scan-speak.dk/datasheet/pdf/26w-8861t00.pdf
One way of dealing with that is to use higher order filters with steeper slopes , so to make the break ups "" more "" inaudible , another way is to use for example high quality paper units which break up more friendly in general and use simple filters (less phase problems )
Assuming though most people hear nothing higher than 20 khz , so whats the problem
Point is you dont want these break ups to be audible , this also the reason there is a specific unit made for a specific freq area .
This is the high freq unit i use at the moment ,smoother than berylium virtually no break up although it doesnt extend as much http://www.scan-speak.dk/datasheet/pdf/d3004-662000.pdf
These are reasons i stepped away from the use of hard materials in LS units.
or this one a ringradiator soft dome http://www.scan-speak.dk/datasheet/pdf/r3004-662000.pdf, although it has a little more break up its a soft dome also thus sounds different then a metal one , also quite extended
First simply explained how the loudspeaker works .
The music signal is a varying alternating current/voltage , this creates a changing magnetic field in the voice coil .
Together with the permanent magnet in the speakerunit this is "" the motor"" of the membrane .
The voice coil gets attracted and distracted/reppeld to/from the permanent magnet.
A LS unit is optimised for a certain freq area in the case of a (metal )dome tweeter for example 2,5 khz -20 khz http://www.seas.no/index.php?option=com_content&view=article&id=76&Itemid=100
this graphic shows a metal dome with break up at around 20 -30 - 40 khz , metal can break up quite drastic but the units keep getting better , berylium is an example http://www.scan-speak.dk/datasheet/pdf/d3004-664000.pdf hardly any violent break up there
When a cone breaks up its not able to follow the music signal accurately anymore and starts to make uncontrolled swings .
Same goes for bass units(or mid units) made of hard materials / metal in this case aluminium , they can also break up quite drastic , example aluminium versus paper http://www.scan-speak.dk/datasheet/pdf/26w-4867t00.pdf
http://www.scan-speak.dk/datasheet/pdf/26w-8861t00.pdf
One way of dealing with that is to use higher order filters with steeper slopes , so to make the break ups "" more "" inaudible , another way is to use for example high quality paper units which break up more friendly in general and use simple filters (less phase problems )
Assuming though most people hear nothing higher than 20 khz , so whats the problem
Point is you dont want these break ups to be audible , this also the reason there is a specific unit made for a specific freq area .
This is the high freq unit i use at the moment ,smoother than berylium virtually no break up although it doesnt extend as much http://www.scan-speak.dk/datasheet/pdf/d3004-662000.pdf
These are reasons i stepped away from the use of hard materials in LS units.
or this one a ringradiator soft dome http://www.scan-speak.dk/datasheet/pdf/r3004-662000.pdf, although it has a little more break up its a soft dome also thus sounds different then a metal one , also quite extended
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