JBL LOFT Service Manual ▷ View online
LOW-FREQUENCY
TRANSDUCER
SP040010
LOW-FREQUENCY
TRANSDUCER
SP040010
BLUE
+
RED
+
YELLOW
+
BLACK
–
BLACK
–
BLUE
+
BLACK
–
BLACK
–
HIGH-FREQUENCY
TRANSDUCER
08020011
TERMINAL CUP
02170003
CROSSOVER
NETWORK
FP000001
Release Date 2012 Discontinued Date XXXX
Technical Manual
LOFT20
AURAL SWEEP TEST SPECIFICATIONS:
• System aurel-sweep test:
• System aurel-sweep test:
8.0V input 80Hz to 20kHz
• LF aural-sweep test:
6.0v input 90Hz to 2kHz
• HF aural-sweep test:
2.83v input 3kHz to 20kHz
PHYSICAL SPECIFICATIONS:
• Dimensions (W x H x D):
• Dimensions (W x H x D):
5-1/5" x 15-3/4" x 7"
130mm x 400mm x 175mm
• Weight:
8 lb (3.6kg) each
WARRANTY:
• Refer to the warranty statement packed with the product.
• Refer to the warranty statement packed with the 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
peaks. We do not recommend sustained operation at these
maximum power levels.
LOFT20
03/12
ACOUSTIC & ELECTRICAL SPECIFICATIONS
:
• Nominal impedance:
8 ohms
• Power Handling:
10-150 watts
• Frequency response:
60Hz-20kHz (-6dB)
• Sensitivity:
89dB (2.83V/1m)
• Crossover frequencies:
2.8kHz
SYSTEM COMPONENTS:
• Cabinet:
• Cabinet:
loft20 MX000066
• Grille:
loft20 HH110002
• Low-frequency transducer:
4" (100mm) SP040010
DC resistance:
10.6 ohms ±10%
• High-frequency transducer: 1" (25mm) 08020011
DC resistance:
DC resistance:
5.6 ohms ±10%
• Crossover network:
FP000001
INPUT
BLUE 250mm
BLACK 250mm
BLACK 70mm
YELLOW 70mm
BLACK 220mm
RED 220mm
HF
L2: 1.13mH
C1: 3.3µF/100V
C2: 6.8µF/100V
L1: 0.27mH
PTC/065A
R1: 3.3 /5W
BLUE 250mm
BLACK 250mm
LF1
LF2
LF1
LF2
LOFT20 WIRING DIAGRAM
LOFT20 SCHEMATIC
PACKAGING
1 HH110002
Grille
1
2 70020149
Self-tapping screw
8
3 02340005
Trim ring
2
4 08020011
Tweeter
1
5 SP040010
Woofer
2
6 MX000066
Cabinet
1
7 02160018
Port tube
2
8 FP000001
Crossover
1
9 02170003
Terminal cup
1
10 70020172
Self-tapping screw
8
11 23020056
Top and bottom styrofoam cover
2
12 23040259
EPE bag
4
13 YX000055
JBL LOFT20 speaker
1
14 23030270
Carton
1
15 03060360
Bumper
4
16 22010156
Manual
1
17 22050002
Dessicant
1
Technical Manual
LOFT20
LOFT20
EXPLODED VIEW
HARMAN International Industries, Incorporated.
© 2012 HARMAN International Industries, Incorporated. All rights reserved. JBL is a trademark of HARMAN International Industries, Incorporated, registered
in the United States and/or other countries.
Features, specifications and appearances are subject to change without notice.
Part No. 950-XXXX-001 Rev. A
Part No. 950-XXXX-001 Rev. A
03/12
www.jbl.com
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