JBL Motion Picture Loudspeaker Systems, Инструкция по эксплуатации

Страница: 6 / 16

4675 4G76A-, 4676A-2
PMAX =
300 W
PMAX =
300 W
PMAX =
300 W
SENSITIVITY:
100 dB,
1 W, 1 M
SENSITIVITY:
106 dB,
1 W, 1 M
SENSITIVITY:
109 dB,
1 W, 1 M
EFFICIENCY:
7%
EFFICIENCY:
8%
EFFICIENCY:
16%
FIGURE 3. JBL THEATER SYSTEMS FOR LARGER HOUSES
TABLE II. WIRE LOSSES
WIRE RUN (DOUBLE; COPPER) NO. 10 NO .12 NO .14 NO .16 NO. 18
10M (33') .02 .032 .05 .08 .125
20 M (66') .04 .064 .10 .16 .250
30M (100')
.06 .096
.15 .24
.375
40M (132') .08 .128 .20 .32 .500
50M (165') .1 .160 .25 .40 .625
60M (200') .12 .192 .30 .48 .750
FOR 8 H LOAD, LINE RESISTANCE SHOULD BE 0.552 OR LESS.
TABLE III. SYSTEMS AND POWER
REQUIREMENTS FOR
LARGER HOUSES
SEATS
VOLUME
(APPROX.)
SYSTEMS
POWER REQUIRED
FOR 100 dB
RECOMMENDED
AMPLIFIER POWER
PER LOUDSPEAKER
500-
8500 M
3
4675 72 WATTS
150 WATTS
1000
(300,000 FT
3
)
4676A-1 63 WATTS
125 WATTS
14,160 M
3
M676A-2 42 WATTS 100 WATTS
1000- 14,160 M
3
4675 90 WATTS 200 WATTS
2000 (500,000 FT
3
) 4676A-1 79 WATTS 200 WATTS
M676A-2 53 WATTS 125 WATTS
BECAUSE OF THEIR EXTREMELY HIGH POWER RATINGS,
THESE SYSTEMS WOULD BE SPECIFIED WITH MUCH LARGER
POWER AMPLIFIERS THAN SUGGESTED HERE FOR USE IN
SPECIAL, HIGH SOUND LEVEL APPLICATIONS.