JBL 4428 User Manual

4428
JBL Consumer Products, 250 Crossways Park Drive, Woodbury, New York 11797
Rev1 9/2003
Legend on Page 2
28
27
(2)
.250
.205
LF INPUT
L3
.14mH
L2
1.0mH
LP2
8ohm
7W
LP1
8ohm
7W
L1
5.0mH
L2
1.0mH
C5
2uf
100V
.110
L.F.
U.H.F.
C1
22uf
100V
R5
1.2ohm
5W
R6
10ohm
5W
+
—
.205
C4
1.0uf
100V
CROSSOVER
NETWORK
351410-001
CROSSOVER NETWORK
351410-002
HIGH-FREQUENCY
TRANSDUCER
339811-001
UHF TRANSDUCER
351265-001
LOW-FREQUENCY
TRANSDUCER
339200-002
GRN
GRN/BLK
RED
RED/BLK
R/W
BLK/WHT
ORN/BLK
ORN
L1
0.1mH
C1
5.1uf
100V
.250
H.F.
R1
7.5ohm
10W
R2
4.7ohm
10W
R3
4.7ohm
10W
R4
4.7ohm
5W
+
—
.205
YEL
YEL/BLK
BLK
RED
BLK/WHT
RED/WHT
GRN/BLK
GRN
ORN/BLK
ORN
YEL/BLK
YEL
C2
10uf
100V
C3
5.1uf
100V
PACKAGING
4428 WIRING DIAGRAM
4428 SCHEMATIC
Technical Manual
4428
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
•Nominal Impedance 8 ohms
• Max Amp Power 200 watts*
•Frequency Response 40Hz – 40kHz (–6dB)
• Sensitivity 91dB (2.83V @ 1 meter)
•Crossover Frequencies 900Hz, 7kHz
SYSTEM COMPONENTS:
• Cabinet 4428 (not for sale)
• Grille 351440-001
• UHF Transducer 7/8" (22mm) 015M
351265-001
DC Resistance 6.7 ohms ±10%
• High-Frequency Transducer 1-3/4" (44.4mm) 175Nd-2
339811-001
DC Resistance 3.7 ohms ±10%
• Low-Frequency Transducer 12" (305mm) 1200FE-8
339200-002
DC Resistance 5.6 ohms ±10%
•Crossover Network – LF 351410-002
HF/UHF w/L-Pad 351410-001
AURAL SWEEP TEST SPECIFICATIONS:
• System Aural Sweep Test 6.0V Input 40Hz to 20kHz
• L.F. Aural Sweep Test 6.0V Input 20Hz to 1.5kHz
• H.F. Aural Sweep Test 2.83V Input 500Hz to 8kHz
• U.H.F. Aural Sweep Test 1.0V Input 5kHz to 20kHz
PHYSICAL SPECIFICATIONS:
• Enclosure dimensions 25" x 16" x 12-1/2"
(H x W x D) (plus 1" for horn mouth)
(635mm x 406mm x 318mm)
•Weight 71 lb (32.3kg) each
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.
®

JBL 4428 Specifications

General

Brand	JBL
Model	4428
Category	Speakers
Language	English

Summary

Acoustic and Electrical Specifications

Nominal Impedance

Specifies the nominal impedance of the speaker system.

Max Amp Power

Indicates the maximum recommended amplifier power rating.

Frequency Response

Defines the frequency range the speaker can reproduce.

Sensitivity

Measures the speaker's efficiency in sound pressure level.

Crossover Frequencies

Identifies the frequencies where the crossover network divides the audio signal.

System Components

Cabinet

Details the speaker enclosure model number.

Grille

Specifies the part number for the speaker grille.

UHF Transducer

Lists the UHF transducer model and DC resistance.

High-Frequency Transducer

Provides details for the high-frequency transducer, including model and DC resistance.

Low-Frequency Transducer

Details the low-frequency transducer, including model and DC resistance.

Crossover Network

Specifies the part numbers for the crossover network components.

Aural Sweep Test Specifications

System Aural Sweep Test

Specifies test conditions for system-wide aural sweep.

L.F. Aural Sweep Test

Defines test parameters for the low-frequency aural sweep.

H.F. Aural Sweep Test

Details test conditions for the high-frequency aural sweep.

U.H.F. Aural Sweep Test

Specifies test parameters for the ultra-high-frequency aural sweep.

Physical Specifications

Enclosure dimensions

Provides the height, width, and depth of the speaker enclosure.

Weight

States the weight of each speaker unit.