| 摘要 |
A down-fill speaker for a large scale sound reproduction system is formed from a cabinet having generally rectangular and trapezoidal cross-sections along respective vertical and horizontal axes thereof. Upper and lower loudspeakers are supportably mounted in the cabinet in a generally vertical array and separated by a separator wall. The upper and lower loudspeakers each include a horn defined by walls of the cabinet. The upper horn is defined by interior side surfaces of top, first side and second side walls of the cabinet and a first interior side surface of the separator wall. The lower horn is defined by interior side surfaces of bottom, first side and second side walls of the cabinet and a second interior side surface of the separator wall. The separator wall is angled about 15 degrees below a horizontal axis for the speaker while the first and second interior side surfaces thereof have oppositely orientated tapers of generally equal magnitude. The interior side surface of the bottom wall is substantially parallel to the lower side surface of the separator wall along a first portion thereof and, along a second portion thereof, the interior side surface of the bottom wall is downwardly angled about 30 degrees relative to the interior side surface of the first portion. Acoustic signals generated by the upper loudspeaker and reflected off of the interior side surface of said top wall provide down-fill coverage for a first area while acoustic signals generated by the lower loudspeaker and reflected off of the second interior side surface of the separator wall provide down-fill coverage for a second area.
|
