JBL Incorporated, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A.
Technical Manual
JBL 4739
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance:
• Input Power Rating:
• Frequency Response:
• Frequency Range:
• Sensitivity:
• Crossover Frequency:
4 Ohms
800W AES; 1200W recommended amplifier
40 Hz - 1.2 k (±3 dB)
30 Hz - 1.2 k (±3 dB)
104 dB SPL, 2.83V @ 1 m (3.3 ft)
1.2 kHz
SYSTEM COMPONENTS:
• Cabinet:
• Low Frequency
Transducer
• DC Resistance:
Enclosure (Not For Sale)
2 x 265H-2, 380 mm (15 in) dia,
Differential Drive® edgewound rib bon voice coil transducers mounted in 4509 LF enclosure
5.25 ohms ±10%
PACKAGE
Warranty Card
59660
SYSTEM COMPONENTS: (Cont’d)
• Terminal Assy: 396-00013-00
AURAL SWEEP TEST SPECIFICATIONS:
A. System Aural Sweep Test: 7.0V Input, 20 Hz to 2 kHz
B. L.F. Aural Sweep Test: 15.5V Input, 30 Hz to 2.2 kHz
1/10 power @ 8 ohms
PHYSICAL SPECIFICATIONS:
• Enclosure Dimensions: 883 x 762 x 450 mm D
(34.75 x 30.0 x 17.75 in. D)
• Net Weight:
• Shipping Weight:
126 lb (7.2 kg)
141 lb (64.0 kg)
WARRANTY INFORMATION:
• Refer to Warranty Statement packed with each product.
WIRING DIAGRAM
Driver,Low Freq.(2)
265H-2
(363837-005X)
Cone Repl
C8R265-1
Carton
990-00207-00
Filler,Carton (2)
991-00212-00
PKG,Microfoam (8)
49790P
20” x 18” Sheets
BLK 0.205
Red 0.250
BLK 0.205
Red 0.250
Terminal Assy
396-00013-00
09-10
COMPONENT EXPLODED VIEW
Nut (5)
835-44000-00
5/16-18
INSERT NUT
TYPE I ZN
Warning Label
73276
Enclosure Assembly 4739
(Not Available for Sale)
Screw (18)
823-11150-32
8 x 2
FLT,PH,NO FIN,LCS
(Internal cabinet screws)
Port Tube (2)
56144
(Not For Sale)
JBL 4739
Screw (5)
807-31010-12
5/16-18 x 3/4
TRS,PH,UNC,BLK
ZINC,L
Washer, (5)
845-00110-08
5/16 X .08
FLT,PLREGBLK
ZINC,CS
Washer (5)
845-03110-08
5/16 X .08
SLTHEL,REG,
BLK ZINC,CS
Driver,
Low Freq (2)
265H-2
(363837-005X)
Cone Repl
C8R265-1
Dome
71646-04
Gasket (2)
360-070002-01
Rear
Screw (16)
804-01110-20
10-32 x 1-1/4
FIL,PH,BLK ZINC,
LCS
T-Nut (16)
61861
10-32X7/16
STEP BARREL
Screw (2)
863-11210-32
8 x 2
FLAT,PH,TYPE AB,
BLK ZINC,LCS
Label
364224-008
Terminal Assy
396-00013-00
Screw (4)
882-51110-12
6 x 3/4
OV,PAN,PTCL,
BLK ZINC,LCS
