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Neodymium Loudspeakers

Neodymium Loudspeakers have several advantages over traditional ceramic magnet designs. Typically they are much lighter and more powerful than conventional speakers which use ferrite, Alnico or Samarium Cobalt magnets. Neodymium speakers often have motors that use a small cylindrical slug or ring magnet that is encased in a low carbon steel pot structure.  The magnetic flux which is already more than  10 times higher than any other material is concentrated across the "gap" where the voice coil moves back and forth.   The strength of the motor (BxL) increases  so efficiency goes up and the whole magnetic structure becomes more compact.  Typically Neo speakers have the additional benifit of not causing any (EMI) interference from stray magnetic flux so by definition they are video shielded.  Neodymium magnets are part of the material science of the future with applications growing everyday.  One example is the fast growing earbud market.   Neo has made it possible to essentially shrink down headphones to sizes that will fit inside your ears.  In addition  they are also efficient enough to produce high volume sound from small battery powered devices with low amplifier output such as  walkmans, MP3 players , laptops and cell phones.  

We specialized in Neodymium Loudspeaker Design.  If you would like more information please contact us. In addition to our custom designs we also offer a few standard Neo models.   

The Lorentz Audio line of push pull Neodymium ribbons 5" & 8" models. These drivers are an excellent choice for Ribbon Line Array Loudspeakers. The 8"Neo model is used in the CGN6685 Line Array Meter Module.  For more detailed  specifications please visit the Ribbon Loudspeakers website.

The Lorentz Audio  Neo Ribbon drivers were designed for pro sound applications. They have the unique combination of having both high efficiency and high power handling. Designed with FEA these ribbons use high temperature polyimide planar material with Aluminum traces suspended between powerfull, opposing  Neo Magnets (40MGO).

Specifications are at http://www.ribbonlinearray.com and http://www.ribbonloudspeakers.com

Also be sure to check out the Lorentz Audio website.  See the link below
This site has 3 pages and was last updated 4-8 - 2012  Page links are listed on the upper left side.


 
B-Hive Motor

Multiple line arrays with all neo components used in a concert sound application. JBL line arrays pictured above. 
CGN audio labs
B-Hive Motor
Ribbon Loudspeakers
Ribbon Line Array

 
  • All dynamic speakers follow one law of Physics.  It's called Lorentz's Law which yields that the force on a moving charge due to a magnetic field is:
    F=qV*B*sin(theta)
    MKS system of units
    q Columbs
    V meters/second
    B Amperes/meters
    theta angle between V & B
    F is directed according to the right hand rule.
    This essentially means that the direction of the  cone is determined by the force of the voice coil in the magnetic field and the direction of the  current.  At CGN, we know our history, which is why we honor this great Nobel Prize winning, Dutch scientist today. 

    We use a lot of neo speakers with many different designs. But in the case of dynamic Neo woofers we often take a different approach and employ our own proprietary motor design.  We use  a "Radially Magnitized" Neodymium Ring Magnet which allows the loudspeaker to have High Excursion & Low Distortion with no stray magnetic flux outside of the steel pot structure. It is an extremely efficient way to utilize all the potential strength of  the Neodymium magnet.  This design also promotes good heat dissipation which reduces power compression.  Finally it has the very important advantage being very light weight.  Please note when comparing subwoofers it is extremely important that you accurately compare efficiency numbers.  You can go to our  B-Hive Motor website for more information or contact us at:
  • CGN audio labs, 27 N. Wacker Drive, Suite 257, Chicago, IL 60606 USA   PH 651-460-4783  FAX 707-597-4484     
  • TGallagher@prodigy.net

    We also manufacture a small line array that is ideal for many small to medium sized venues. Introducing the all Neo version of the CGN6685 Line Array Meter Module
    6 x Neo6.5" woofers & 5 x Lorentz8" Neo Ribbons in a compact, Ultra low mass, acoustically inert, composite technology enclosure (26 LBs./11.8 Kgs.) One meter high.
  • Pictured above is a CAD drawing of the B-Hive Motor featuring  a Neodymium Ring Magnet. The innovative (new) ribbed design increases heat dissipation and lowers weight. The exterior surface area is increased and the internal structure is optimized to promote even magnetic flux across the gap.
  • List:  SpeakerTerms  http://www.webervst.com/spterm.html 
  • Loudspeakers - Wikipedia  http://en.wikipedia.org/wiki/Loudspeaker 

  • Aura Sound Neo Radial Technology (NRT)http://www.madisound.com/store/manuals/aurasound-nrt-whitepaper.pdf

  • JBL white paper Differential Drive Transducers http://www.jblpro.com/catalog/support/getfile.aspx?docid=1253&doctype=3

  • JBL AES paper Heat Dissipation and Power Compression in Loudspeakers Doug Button http://www.aes.org/tmpFiles/elib/20110912/7059.pdf 

Induction Drive Loudspeakers   http://docs.google.com/gview?url=http://www.redrockacoustics.com/induction_+drive_+loudspeakers_alma.pdf&chrome=true

Permanet Magnet Design Guidelines http://docs.google.com/gview?url=http://www.magnetapplications.com/docs/magappsdesignguide0508.pdf&chrome=true

Community ENTASYS column line array http://docs.google.com/gview?url=http://communitypro.com/files/literature/spec+sheets/ENTASYS_SPEC.pdf&chrome=true

JBL  K2   http://docs.google.com/gview?url=http://www.jbl.com/resources/Brands/jbl/Products/ProductRelatedDocuments/en-US/ProductInformation/Brochure+-+K2+and+Array++(English).pdf&chrome=true

ElectroVoice http://docs.google.com/gview?url=http://www.electrovoice.com/sitefiles/downloads/xn_eds.pdf&chrome=true http://docs.google.com/gview?

Audience A3 Seakers  http://docs.google.com/gview?url=http://www.e-speakers.com/AudienceA3.pdf&chrome=true

Heil Motion Transformer http://docs.google.com/gview?url=http://www.hs-devices.mundorf.com/english/PDFs/Datenblatt+2510c.pdf&chrome=true