A COMPACT AND EFFICIENT SUB-WOOFER SYSTEM AND METHOD FOR INSTALLATION IN STRUCTURAL PARTITIONS
申请公布号:EP0377262(A3)
申请号:EP19890250128
申请日期:1989.12.22
申请公布日期:1991.10.30
发明人:POLK, MATTHEW S.
分类号:H04R1/02;H04R1/28;H04R31/00;(IPC1-7):H04R1/28
主分类号:H04R1/02