Technical Manual
S312
II
Studio
™
Series
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance
8 ohms
• Max Amp Power
250 watts
• Frequency Response
35Hz – 20kHz
• Sensitivity
92dB (1 watt @ 1 meter)
• Crossover Frequencies
750Hz, 3000Hz
SYSTEM COMPONENTS:
• Enclosure
S312
II
(not for sale)
• Grille 338778-001
• Low-Frequency Transducer
12" (305mm) PolyPlas,
™
shielded
(335151-002)
DC Resistance
5.6 ohms ±10%
• Mid-Frequency Transducer
4" (101mm) PolyPlas,
™
shielded
(338040-001)
DC Resistance
4.3 ohms ±10%
• High-Frequency Transducer 1" (25mm) titanium dome,
shielded (338042-001)
DC Resistance
3.4 ohms ±10%
• Crossover Network
335412-002
AURAL SWEEP TEST SPECIFICATIONS:
• A. System Aural Sweep Test 6.0V Input 30Hz to 20kHz
• B. L.F. Aural Sweep Test
6.0V Input 30Hz to 1kHz
• C. M.F. Aural Sweep Test
4.0V Input 500Hz to 4kHz
• D. H.F. Aural Sweep Test
2.83V Input 3kHz to 20kHz
PHYSICAL SPECIFICATIONS:
• Enclosure dimensions:
41" x 14-3/4" x 12-1/4"
(H x W x D)
1041mm x 375mm x 311mm
• Weight
77 lb/35kg each
WARRANTY:
• Refer to Warranty Statement packed with each product.
Owner’s Manual
338018-001
Warranty Card
338322-001
Survey Card
331384-001
Spike Foot Kit
338076-001
OWNER’S
MANUAL
Upper/Lower
Foam
337754-001
Microfoam
(2 pcs.)
Outer Carton
338056-001
PACKAGING
07/02
JBL Consumer Products, 250 Crossways Park Dr., Woodbury, New York 11797
S312
II
Studio
™
Series
Driver
High-Frequency
338042-001
Driver
Mid-Frequency
338040-001
Driver
Low-Frequency
335151-002
YELLOW/BLACK
WHITE/BLACK
GREEN/BLACK
WHITE
GREEN
YELLOW
Crossover Network
335412-002
+IN
–IN
INPUT
GREEN
BLK/GREEN
WHT/BLACK
WHITE
YELLOW
YEL/BLK
RED
BLACK
L.F.
M.F.
+
H.F.
250
+
+
205
205
–
110
–
205
–
110
L4
4.4mH
R6
5.1 ohms
10W
C7
40
µ
F
100V
C2
0.01
µ
F
250V
R3
40 ohms
5W
R7
2.4 ohms
10W
R8
2.4 ohms
10W
L2
400
µ
H
C3
20
µ
F/100V
C4
0.01
µ
F/250V
C8
9
µ
F/100V
R5
10 ohms
5W
L3
220
µ
H
C6
0.01
µ
F/250V
S312
II
SCHEMATIC
WIRING DIAGRAM
