1208 mm (47 9/16 in) Acoustical axis
1458 mm (57 3/8 in)
880 mm (34 5/8 in)
578 mm (22 3/4 in)
500 mm (19 11/16 in)
694 mm (27 5/16 in)
195 mm
(7 11/16 in)
330 mm (13 in)
Figure 11. Dimensions of the 8381A enclosure
Vertical direction (degrees)
8381A 2023−04−24 vertical plane, normalized with on−axis
100 1k 10k
−90
−75
−60
−45
−30
−15
0
15
30
45
60
75
90
−21
−18
−15
−12
−9
−6
−3
0
Horizontal direction (degrees)
8381A 2023−04−24 horizontal plane, normalized with on−axis
100 1k 10k
−90
−75
−60
−45
−30
−15
0
15
30
45
60
75
90
−21
−18
−15
−12
−9
−6
−3
0
100 1k 10k
65
70
75
80
85
90
Frequency (Hz)
Sound Pressure Level (dB SPL)
8381A (2023−08−17)
100 1k 10k
80
85
90
95
100
Frequency (Hz)
Power response (dB SWL)
8381A 2023−04−24 power response
Figure 14. Vertical directivity characteristics of the 8381A. Figure 15. Horizontal directivity characteristics of the 8381A.
Figure 12. Horizontal directivity characteristics of the 8381A. Figure 13. The monitor's power response.