Technical Manual
N28II
Northridge
™
Series
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
• Nominal Impedance 8 ohms
• Max Amp Power 150 watts*
•Frequency Response 50Hz – 20kHz (–3dB)
• Sensitivity 90dB (1 watt @ 1 meter)
•Crossover Frequency 4000Hz
SYSTEM COMPONENTS:
• Cabinet N28II (not for sale)
•Grille 337784-001
• Low-Frequency Transducer 8" (203mm) PolyPlas
™
cone,
shielded (335469-002)
DC Resistance 5.2 ohms ±10%
• High-Frequency Transducer 3/4" (19mm) titanium-laminate
dome, shielded (338035-001)
DC Resistance 3.0 ohms ±10%
•Crossover Network 335589-002
AURAL SWEEP TEST SPECIFICATIONS:
• System Aural Sweep Test 6.0V Input 50Hz to 20kHz
• L.F. Aural Sweep Test 5.0V Input 50Hz to 5kHz
• H.F. Aural Sweep Test 2.83V Input 3kHz to 20kHz
PHYSICAL SPECIFICATIONS:
• Enclosure Dimensions 19-1/2" x 10-1/2" x 11-1/4"
(H x W x D) 495mm x 267mm x 286mm
•Weight 36 lb/16.4kg (sold in pairs)
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.
Owner’s Manual
338061-001
Warranty Card
338322-001
Survey Card
331384-001
OWNER’S
MANUAL
Outer Carton
(Black)
337766-001
Plastic Bag (2)
Felt Pads
335634-001
Upper/Lower
Foam
337767-001
PACKAGING
09/02
JBL Consumer Products, 250 Crossways Park Dr., Woodbury, New York 11797
N28II Northridge
™
Series
— +
Driver High
Frequency
338035-001
Driver Low
Frequency
335469-002
Network
335589-002
GREEN/BLACK
GREEN
YELLOW
YELLOW/BLACK
L.F.
+IN
–IN
INPUT
+
H.F.
250
+
205
–
110
–
205
L3
0.2µH
L4
0.1mH
C2
4µF/100v
R2
1.8 OHM/10W
RED
BLACK
GREEN 14"
GREEN/BLACK 14"
YELLOW 18"
YELLOW/BLACK 18"
N28II SCHEMATIC
WIRING DIAGRAM
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