EP 0155266 B1 19910320 - LOUDSPEAKER STRUCTURE
Title (en)
LOUDSPEAKER STRUCTURE
Publication
Application
Priority
US 8301355 W 19830906
Abstract (en)
[origin: WO8501176A1] An up-firing woofer loudspeaker (12) is mounted atop a truncated pyramidal enclosure (1). A down-firing tweeter (5) is aligned above the woofer. A sound-reflecting sphere (4) is disposed between the woofer and the tweeter. When the sphere is aligned therebetween omni-directional sound is radiated in both horizontal and vertical planes. When the sphere is positioned to the rear a hemispherical pattern is obtained. This pattern is desirable when the loudspeaker structure is positioned against a wall. Ducted ports (3) or a folded horn (20) within the enclosure enhance very low frequency sound.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H04R 1/2865 (2013.01); H04R 1/345 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8501176 A1 19850314; DE 3382223 D1 19910425; EP 0155266 A1 19850925; EP 0155266 A4 19880128; EP 0155266 B1 19910320
DOCDB simple family (application)
US 8301355 W 19830906; DE 3382223 T 19830906; EP 83903131 A 19830906