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Reference 1240w 12" Woofer – Technical Data
CAR AUDIO
SPECIFICATIONS
DIAMETER:
SENSITIVITY (2.83 V @ 1 M):
POWER HANDLING:
FREQUENCY RESPONSE:
NOMINAL IMPEDANCE:
VOICE-COIL DIAMETER:
DIMENSIONS:
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
12" (300 MM )
93 dB
300 WRMS 1200 WPEAK
23 ~ 400 HZ
4 OHMS
2.0" (51.0 MM)
Reference 1240w
(side view)
VBOX = 1.25 ft3 (35.40 liters)
mounting depth
5-1/16" (129 mm)
SEALED ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
cutout diameter
11-3/16" (284mm)
outer diameter
12-7/16" (316mm)
105 dBSPL
100
THIELE-SMALL PARAMETERS
In-Car
12 dB LP @ 80 Hz
95
90
85
VOICE COIL DC RESISTANCE:
R EVC (OHMS) . . . . . . 3.40
VOICE COIL INDUCTANCE @ 1 KHZ: L EVC (M H) . . . . . . . 2.54
S D (IN 2) . . . . . . . . 82.46
DRIVER RADIATING AREA:
S D (M2) . . . . . . . 532.00
B L (TM) . . . . . . . . 14.24
MOTOR FORCE FACTOR:
VAS (FT3) . . . . . . . . 3.00
COMPLIANCE VOLUME:
VAS (LITERS) . . . . . 84.40
C MS (µM/N) . . . . 210.00
SUSPENSION COMPLIANCE:
MMS (GRAMS). . . . 187.60
MOVING MASS, AIR LOAD:
MMD (GRAMS) . . . 180.60
MOVING MASS, DIAPHRAGM:
FS (HZ) . . . . . . . . 25.40
FREE-AIR RESONANCE:
Q MS . . . . . . . . . . . 7.62
MECHANICAL Q:
Q ES . . . . . . . . . . . 0.50
ELECTRICAL Q:
Q TS . . . . . . . . . . . . 0.47
TOTAL Q:
HAG (IN) . . . . . . . . 3/8
MAGNETIC-GAP HEIGHT:
HAG (MM) . . . . . . . . 9.00
HVC (IN) .. . . . . . . . 1-1/4
VOICE-COIL HEIGHT:
HVC (MM) . . . . . . . . . . 32
X MAX (IN) . . . . . . . . 7/16
MAXIMUM EXCURSION:
X MAX (MM) . . . . . . 11.50
Out-Of-Car
80
75
70
65
60
55
20 Hz
30
40
50
60
70
80 90 100
200
300
200
300
SEALED ENCLOSURE CONE
EXCURSION @ 300 W
30m M
20m
10m
5m
2m
1m
500u
200u
100u
50u
20u
10u
5u
20 Hz
30
40
50
60
70
80 90 100
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-674-4463 • www.infinitysystems.com
Reference 1240w 12" Woofer – Technical Data
CAR AUDIO
VENTED BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
length = 12-1/4"
312mm
Reference 1240w
BANDPASS BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
fB= 63 Hz
fB = 30.0 Hz
Reference 1240w
(side view)
VBOX =
2 ft 3
(side view)
(56.63 liters)
diam. = 4"
102mm
diameter = 4"
102mm
BANDPASS ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
dBSPL
105 dBSPL
100
100
In-Car
12 dB LP @ 80 Hz
95
95
In-Car
12 dB LP @ 80 Hz
90
90
85
85
Out-Of-Car
80
80
75
75
70
70
65
65
60
60
55
20 Hz
30
40
50
60
70
80 90 100
200
300
55
VENTED ENCLOSURE CONE
EXCURSION @ 300 W
Out-Of-Car
20 Hz
30
40
50
60
70
80 90 100
200
300
200
300
BANDPASS ENCLOSURE CONE
EXCURSION @ 300 W
30m M
20m
30m M
20m
10m
10m
5m
5m
2m
2m
1m
1m
500u
500u
200u
200u
100u
100u
50u
50u
20u
20u
10u
5u
VFRONT = 1.25 ft3
(35.40 liters)
VREAR = 1.25 ft 3 (35.40 liters)
VENTED ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
105
length =
8"
204mm
2 Ports
Port
10u
20 Hz
30
40
50
60
70
80 90 100
200
300
5u
20 Hz
30
40
50
60
70
80 90 100
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-674-4463 • www.infinitysystems.com