JBL 4428 Technical Manual

Technical Manual
4428
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance
• Max Amp Power
• Frequency Response
• Sensitivity
• Crossover Frequencies
SYSTEM COMPONENTS:
• Cabinet
• Grille
• UHF Transducer
DC Resistance
• High-Frequency Transducer
DC Resistance
• Low-Frequency Transducer
DC Resistance
• Crossover Network – LF
HF/UHF w/L-Pad
PACKAGING
JBL Consumer Products, 250 Crossways Park Drive, Woodbury, New York 11797
8 ohms
200 watts*
40Hz – 40kHz (–6dB)
91dB (2.83V @ 1 meter)
900Hz, 7kHz
4428 (not for sale)
351440-001
7/8" (22mm) 015M
351265-001
6.7 ohms ±10%
1-3/4" (44.4mm) 175Nd-2
339811-001
3.7 ohms ±10%
12" (305mm) 1200FE-8
339200-002
5.6 ohms ±10%
351410-002
351410-001
Legend on Page 2
28
(2)
27
AURAL SWEEP TEST SPECIFICATIONS:
• System Aural Sweep Test
• L.F. Aural Sweep Test
• H.F. Aural Sweep Test
• U.H.F. Aural Sweep Test
PHYSICAL SPECIFICATIONS:
• Enclosure dimensions
(H x W x D)
• Weight
WARRANTY:
• Refer to Warranty Statement packed with each product.
* The maximum recommended amplifier power rating will
ensure proper system headroom to allow for occasional
peaks. We do not recommend sustained operation at these
maximum power levels.

4428 WIRING DIAGRAM

CROSSOVER NETWORK
351410-002
RED
BLK
RED/WHT
BLK/WHT
CROSSOVER
NETWORK
351410-001
4428 SCHEMATIC
RED
+
L1
LF INPUT
5.0mH
100V
—
RED/BLK
R/W
+
R1 L1
0.1mH
7 .5ohm
C1
10W
5.1uf
C2
100V
10uf
100V
R2 R3
4.7ohm 4.7ohm
10W 10W
—
BLK/WHT
1.2ohm
C4 C5
1.0uf 2uf
100V 100V
L3
.14mH
6.0V Input 40Hz to 20kHz
6.0V Input 20Hz to 1.5kHz
2.83V Input 500Hz to 8kHz
1.0V Input 5kHz to 20kHz
25" x 16" x 12-1/2"
(plus 1" for horn mouth)
(635mm x 406mm x 318mm)
71 lb (32.3kg) each
LOW-FREQUENCY
TRANSDUCER
339200-002
YEL
YEL/BLK
HIGH-FREQUENCY
TRANSDUCER
339811-001
UHF TRANSDUCER
351265-001
GRN
.250
L2
C1
L.F.
1.0mH
22uf
.205
GRN/BLK
YEL/BLK
.205
L2
H.F.
1.0mH
C3
5.1uf
100V
LP1
R4
8ohm
4.7ohm
7W
5W
.250
YEL
ORN
.205
R5
5W
R6
10ohm U.H.F.
LP2
5W
8ohm
7W
.110
ORN/BLK
Rev1 9/2003
®