협력 업체

SONIC SYSTEMS, INC (USA).
INTERNATIONAL CELLULOSE CORP (USA).
RADIA PRO SYSTEMS (USA).
SIAP B.V (NETHERLANDS).
HACOUSTO INTERNATIONAL B.V. (NETHERLANDS).
OUTBOARD ELECTRONICS, LTD (UK).
n 'H AKUSTIK + Design AG (SWITZERLAND).
BASWA AG (SWITZERLAND).
SONUS GMBH (GERMANY).
EBERHARD BUHNEN (SWITZERLAND).
Fohhn Audio (Deutch)