Infinity 1240w User manual

1240w
Infinity
Brand
Infinity
Model
1240w
Category
Car subwoofers
Type
User manual

This manual is also suitable for

Infinity 1240w is a 12-inch car audio woofer capable of handling up to 300 watts RMS and producing a frequency response of 23 to 400 Hz. It features a 4-ohm nominal impedance, 2-inch voice coil diameter, and a sensitivity rating of 93 dB at 1 meter with 2.83 volts of input power. The woofer is suitable for use in sealed, vented, or bandpass enclosures, with recommended volumes and dimensions specified in the manual. It also includes parameters like Thiele-Small parameters and cone excursion data for advanced audio system design and tuning.

Infinity 1240w is a 12-inch car audio woofer capable of handling up to 300 watts RMS and producing a frequency response of 23 to 400 Hz. It features a 4-ohm nominal impedance, 2-inch voice coil diameter, and a sensitivity rating of 93 dB at 1 meter with 2.83 volts of input power. The woofer is suitable for use in sealed, vented, or bandpass enclosures, with recommended volumes and dimensions specified in the manual. It also includes parameters like Thiele-Small parameters and cone excursion data for advanced audio system design and tuning.

SPECIFICATIONS
D
IAMETER
:12" (300
MM
)
S
E
NSITIVITY
(2.83 V @ 1
M
): 93 dB
P
OWER
H
ANDLING
:300 W 1200 W
PEAK
RMS
F
REQUENCY
R
ESPONSE
: 23 ~ 400 H
Z
N
OMINAL
I
MPEDANCE
:4
OHMS
V
OICE
-C
OIL
D
IAMETER
:2.0" (51.0
MM
)
D
IMENSIONS
:
THIELE-SMALL PARAMETERS
V
OICE
C
OIL
D
C
R
ESISTANCE
:R
EVC
(
OHMS
) . . . . . . 3.40
V
OICE
C
OIL
I
NDUCTANCE
@ 1
K
H
Z
:L
EVC
(
M
H) . . . . . . . 2.54
D
RIVER
R
ADIATING
A
REA
:S
D
(
IN
2
) . . . . . . . . 82.46
S
D
(
M
2
) . . . . . . . 532.00
M
OTOR
F
ORCE
F
ACTOR
:B
L
(T
M
) . . . . . . . . 14.24
C
OMPLIANCE
V
OLUME
:V
AS
(
FT
3
) . . . . . . . . 3.00
V
AS
(
LITERS
) . . . . . 84.40
S
USPENSION
C
OMPLIANCE
:C
MS
(µ
M
/N) . . . . 210.00
M
OVING
M
ASS
, A
IR
L
OAD
:M
MS
(
GRAMS
). . . . 187.60
M
OVING
M
ASS
, D
IAPHRAGM
:M
MD
(
GRAMS
) . . . 180.60
F
REE
-A
IR
R
ESONANCE
:F
S
(H
Z
) . . . . . . . . 25.40
M
ECHANICAL
Q: Q
MS
. . . . . . . . . . . 7.62
E
LECTRICAL
Q: Q
ES
. . . . . . . . . . . 0.50
T
OTAL
Q: Q
TS
. . . . . . . . . . . . 0.47
M
AGNETIC
-G
AP
H
EIGHT
:H
AG
(
IN
) . . . . . . . . 3/8
H
AG
(
MM
) . . . . . . . . 9.00
V
OICE
-C
OIL
H
EIGHT
:H
VC
(
IN
) .. . . . . . . . 1-1/4
H
VC
(
MM
) . . . . . . . . . . 32
M
AXIMUM
E
XCURSION
:X
MAX
(
IN
) . . . . . . . . 7/16
X
MAX
(
MM
) . . . . . . 11.50
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
SEALED ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
SEALED ENCLOSURE CONE
EXCURSION @ 300 W
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-674-4463 • www.infinitysystems.com
Reference 1240w 12" Woofer – Technical Data
C
AR
A
U
D
I
O
mounting depth
5-1/16" (129 mm)
cutout diameter
11-3/16" (284mm)
outer diameter
12-7/16" (316mm)
V
B
OX
= 1.25 ft
3
(35.40 liters)
Reference 1240w
(side view)
20 Hz
30 40 50 60 70 80 90
100
200300
20 Hz
30 40 50 60 70 80 90
100
200300
dBSPL
55
60
65
70
75
80
8
5
90
95
100
105
M
5u
10u
20u
50u
100u
200u
500u
1m
2m
5m
10m
20m
30m
O
ut-Of-Car
I
n-Car
12 dB LP @ 80 Hz
VENTED BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
VENTED ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
VENTED ENCLOSURE CONE
EXCURSION @ 300 W
BANDPASS BOX VOLUME
(INCLUDES DRIVER/PORT DISPLACEMENTS)
BANDPASS ENCLOSURE
FREQUENCY RESPONSE @ 2.83 V
BANDPASS ENCLOSURE CONE
EXCURSION @ 300 W
Harman Consumer Group • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-674-4463 • www.infinitysystems.com
Reference 1240w 12" Woofer – Technical Data
CAR
A
U
DI
O
Reference 1240w
(side view)
Port
f
B
=
30.0 Hz
diameter = 4"
102mm
l
ength = 12-1/4"
312mm
V
B
OX
= 2 ft
3
(56.63 liters)
V
R
EAR
= 1.25 ft
3
(35.40 liters) V
F
RONT
=1.25 ft
3
(35.40 liters)
Reference 1240w
(
side view)
d
iam. = 4"
102mm
2 Ports
f
B
= 63 Hz
length =
8"
204mm
20 Hz
30 40 50 60 70 80 90
100
200300
55
60
65
70
75
80
85
90
95
100
105
20 Hz
30 40 50 60 70 80 90
100
200300
55
6
0
65
7
0
7
5
8
0
85
9
0
9
5
1
00
105
d
BSPL
dBSPL
20 Hz
30 40 50 60 70 80 90
100
200300
5u
10u
20u
50u
100u
200u
500u
1m
2m
5m
10m
20m
30m
M
20 Hz
30 40 50 60 70 80 90
100
200300
5u
10u
20u
50u
100u
200u
500u
1m
2m
5m
10m
20m
30m
M
O
ut-Of-Car
I
n-Car
1
2 dB LP @ 80 Hz
Out-Of-Car
In-Car
1
2 dB LP @ 80 Hz
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Infinity 1240w User manual

1240w
Infinity
Brand
Infinity
Model
1240w
Category
Car subwoofers
Type
User manual
This manual is also suitable for

Infinity 1240w is a 12-inch car audio woofer capable of handling up to 300 watts RMS and producing a frequency response of 23 to 400 Hz. It features a 4-ohm nominal impedance, 2-inch voice coil diameter, and a sensitivity rating of 93 dB at 1 meter with 2.83 volts of input power. The woofer is suitable for use in sealed, vented, or bandpass enclosures, with recommended volumes and dimensions specified in the manual. It also includes parameters like Thiele-Small parameters and cone excursion data for advanced audio system design and tuning.

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