JBL 404 GTi User Manual / Operation Manual ▷ View online
optimum for your application and listening
habits.
habits.
Following these guidelines will provide
virtually distortion free sound reproduction
and long loudspeaker life.
and long loudspeaker life.
In Case of Difficulty
The most common difficulties are
noise, distortion, and intermittent
connections.
connections.
System noise is usually not the fault of
the 404 or 504GTi. Hiss or “alternator
whine” is most often the result of faulty
grounding of the system electronics or
improper setting of amplifier level controls.
An exception to this is if the passive
crossover networks are mounted near a
source of radiated noise, the network may
pick-up this noise with sufficient power to
drive the 404 and 504GTi. For this reason,
be careful not to mount any passive
crossovers near wires carrying high
currents such as battery cables or wires
whine” is most often the result of faulty
grounding of the system electronics or
improper setting of amplifier level controls.
An exception to this is if the passive
crossover networks are mounted near a
source of radiated noise, the network may
pick-up this noise with sufficient power to
drive the 404 and 504GTi. For this reason,
be careful not to mount any passive
crossovers near wires carrying high
currents such as battery cables or wires
leading to ammeters or tachometers.
Distortion is usually the result of
overdriving one or more components in
the system. The problem is most likely
insufficient amplifier power, or improper
setting of gain controls. Refer to the
instructions which came with the
electronics for assistance. The 404 and
504GTi will not play as loudly, or handle
the full rated power, when used without a
subwoofer and associated high-pass
crossover. When using the 404 or 504GTi
full-range, be careful to limit the volume
level to that which can be reproduced
without audible distortion from the speaker.
the system. The problem is most likely
insufficient amplifier power, or improper
setting of gain controls. Refer to the
instructions which came with the
electronics for assistance. The 404 and
504GTi will not play as loudly, or handle
the full rated power, when used without a
subwoofer and associated high-pass
crossover. When using the 404 or 504GTi
full-range, be careful to limit the volume
level to that which can be reproduced
without audible distortion from the speaker.
If you want to talk to us about any
problems, call JBL Customer Service at
1-800-336-4JBL (4525) between 9AM and
5PM eastern time.
1-800-336-4JBL (4525) between 9AM and
5PM eastern time.
13
404/504 MANUAL.QXP 7/17/98 11:39 AM Page 13
Specifications:
404GTi
504GTi
Frequency response:
80 – 21kHz
60 – 21kHz
Recommended minimum High-Pass Crossover
Frequency for High Power Operation:
Frequency for High Power Operation:
80Hz
50Hz
Continuous Power Handling With 12dB
Passive Network High Passed at
Recommended Minimum Frequency:
Passive Network High Passed at
Recommended Minimum Frequency:
85 Watts
120 Watts
Continuous Power Handling When Used
Without High-Pass (Full-Range Operation):
Without High-Pass (Full-Range Operation):
60 Watts
80 Watts
Minimum Recommended Amplifier Power:
20 Watts
20 Watts
Maximum Recommended Amplifier Power Rating:
125 Watts
150 Watts
Sensitivity (2.83 Volts / 1 Meter):
89dB
91dB
Impedance:
4 Ohms
4 Ohms
Dimensions – Woofer/Midrange Transducers
Overall Maximum Diameter
(Mounting Tab to Frame Edge):
4
3
/
8
" (111mm)
5
1
⁄
8
" (130mm)
Height:
2
1
⁄
8
" (54mm)
2
3
⁄
8
" (60mm)
Mounting Depth:
1
7
⁄
8
" (48mm)
2
1
⁄
16
" (53mm)
Cutout Size:
3
3
⁄
4
" (95mm)
4
3
⁄
4
" (121mm)
Weight (1 Driver):
1 lb. 9 oz. (0.71kg)
1 lb. 13 oz. (0.82kg)
Dimensions – Tweeter
Overall Diameter:
1
15
⁄
16
" (50mm)
1
15
⁄
16
" (50mm)
Height:
11
⁄
16
" (18mm)
11
⁄
16
" (18mm)
Height With Angle Adapter:
1
1
⁄
2
" (38mm)
1
1
⁄
2
" (38mm)
Flush Mount Cutout Diameter:
2
1
⁄
8
" (54mm)
2
1
⁄
8
" (54mm)
Flush Mount Depth:
15
⁄
16
" (23mm)
15
⁄
16
" (23mm)
Dimensions – Crossover Network (LxWxH):
5
10
/
16
" x 3
3
/
16
" x1
9
/
16
"
5
10
/
16
" x 3
3
/
16
" x 1
9
/
16
"
(143mm x 81mm x 40mm)
(143mm x 81mm x 40mm)
14
404/504 MANUAL.QXP 7/17/98 11:39 AM Page 14
Thiele-Small Specifications:
404GTi
504GTi
Free Air Resonance (Fs):
125Hz
100Hz
Electrical Damping (Qes):
0.52
0.51
Mechanical Damping (Qms):
5.17
5.14
Total Damping (Qt):
0.47
0.4
Equivalent Volume of Compilance (Vas):
0.0388 cu. ft. (1.10 liters)
0.1059 cu. ft. (3.0 liters)
Effective Cone Area (Sd):
9.3 sq. inches (0.0060 m
2
)
14.26 sq. inches (0.0092 m
2
)
Center to Peak Linear Excursion (Xmax):
0.126 inches (3.2mm)
0.126 inches (3.2mm)
Voice Coil DC Resistance (Re):
3.4 ohms
3.4 ohms
Voice Coil Inductance (Le):
0.22mH @ 1kHz
0.22mH @ 1 kHz
Voice Coil Diameter:
2 inches (51mm)
2 inches (51mm)
Voice Coil Length (Winding Length):
0.400 inches (10.2mm)
0.400 inches (10.2mm)
Air Gap Height:
0.200 inches (5.1mm)
0.200 inches (5.1mm)
BL Product:
6.2 T/M
6.2 T/M
Effective Moving Mass (Mm):
0.28 oz. (8.0 Grams)
0.32 oz. (9.0 Grams)
Note: Specifications apply only after a 2 hour break-in period at medium volume levels.
JBL continually strives to impove its products. New materials, production methods and other refinements may result in a change from published
specifications and description. The changes will equal or exceed the original specifications, unless otherwise stated.
specifications and description. The changes will equal or exceed the original specifications, unless otherwise stated.
15
404/504 MANUAL.QXP 7/17/98 11:39 AM Page 15
A Harman International Company
NMGP/N:304353-001
5/94
404/504 MANUAL.QXP 7/17/98 11:39 AM Page B