Acoustica Beyma, Spain
Adamson, Canada
A&D Audio Co., Hong Kong
A.E.B. / Eighteen Sound, Italy
AKG Acoustics, Austria
Alpine Electronics of America, USA
American Ally, China
Apple Computer, USA
ATC, UK
Audilab, Brazil
Audiovox, USA
Audyon, Italy
AuraSound, USA
Bang & Olufsen, Denmark
B&C Speakers, Italy
Behringer, China
Blaupunkt, Germany
Bose Automotive GmbH, Germany
Bosch, Malaysia
Brush Wellmann, USA
B&W Loudspeakers Ltd., UK
Dainty, China
Dakshin, India
Dr. Kurt Mueller, Germany
Canton, Germany
Canon Research Centre, France
Cartotecnica Zanatta, Italy
Celestion, UK
Cerwin-Vega, USA
CIARE Speakers, Italy
Compupal, China
Edifier, China
Elder Audio Manufacture, China
Elettromedia, Italy
Eminence Speaker, USA
Faital, Italy
Fachhochschule Deggendorf, Germany
Fachhochschule Oldenburg, Germany
FBT Electtronica, Italy
Feng Chia University, Taiwan
Fenda, China
Fink Audio Consulting, Germany
Focal JMlab, France
Fondazione G. Cini, Italy
Foster, China
Fujitsu Ten Corporation of America, USA
Genelec, Finland
GGEC, China
Gibson Musical Instuments, USA
GP Electronic, China
Harman/Becker Automotive, USA
Harman/Becker Automotive Systems, Germany
Harman/Becker Automotive Systems, UK
Harman Consumer International, France
Harman International, USA
Harman (Suzhou), China
Hochschule München, Germany
Hongli / VECO, China
Huiyang Eastern Asia Electronics, China
Institut für Rundfunktechnik, Germany
I.S.T. Electronics Factory, China
ICE Power (Bang & Olufsen) - Denmark
IWAI, India
Jamo A/S, Denmark
Jinrun, China
Jiashan Haosheng Electronic, China
JL Audio, USA
Joachim Gerhard Design, Germany
Jusang College, Korea
Kimber Kable, USA
Klein + Hummel, Germany
Klipsch, USA
Konftel, China
L Acoustics, France
Lautsprecherlabor Berlin, Germany
Lautsprecher Teufel, Germany
Logitech-Audio, USA
Magnat, Germany
Merry, Taiwan
Meyer Sound Laboratories, USA
Meiloon, China
Mitek, USA
Monetech, China
Monitor Audio, UK
National Chiao-Tung University, Taiwan
Nedlab, USA
Nexo, France
Ningbo Xiangyang, China
NXP, Austria
P. Audio, Thailand
Panasonic, USA
Panasonic, Germany
Panasonic, Slovakia
Panasonic / Matsushita Electronic Components, Great Britain
PHL Audio, France
PSS, Belgium
PSS, China
Plantronics, USA
Plantronics, Mexico
Polk Audio, USA
QSC, USA
RCF, Italy
Reaxt, China
Recoton / NHT, USA
Rockford Acoustic Design, USA
Samsung Blue-Tek, Korea
Samsung Electronics, Korea
Sanecore, Chine
SEAS Fabrikker, Norway
Selenium, Brazil
Sennheiser, Germany
Sound Sources, Taiwan
Sony Malaysia
Sun Technique Electric, Hong Kong
SICA Altoparlanti, Italy
SIPE, Italy
Solidex, China
Sonavox, China
Song Am Than, Vietnam
Soundking, China
Taison, Shinhint, China
Technical University of Denmark
Telex / Electro-Voice, USA
Tonwel Co. Ltd, China
Triangle Industries, France
TVM - Czech Republic
Ultimate, China
Visteon, USA
Welcohm Technology, France
Wrozlaw University of Technology, Poland
Wuxi Jiefu Electroacoustic, China
Xiamen Shengxing Electronic, China
Zenmay, China
Zylux - China
and others