Infinity Reference 1250w User Manual

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 1250w 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 1250w
(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

Infinity Reference 1250w Specifications

General

Size	12 inches
Impedance	4 ohms
Fs (Resonant Frequency)	27 Hz
Type	Subwoofer
RMS Power	300W
Peak Power	1200W
Frequency Response	23 Hz - 400 Hz
Voice Coil Diameter	2 inches
Mounting Depth	6-7/16 inches
Voice Coil	Single
Mounting Cutout Diameter	11.125 inches

Summary

Speaker Specifications

Diameter

Woofer diameter.

Sensitivity

Speaker sensitivity in dB.

Power Handling

RMS and Peak power ratings.

Frequency Response

Operational frequency range.

Nominal Impedance

Speaker's electrical resistance.

Voice-Coil Diameter

Diameter of the voice coil.

Dimensions

Physical mounting and overall size.

Sealed Box Volume

Recommended sealed box volume.

Sealed Enclosure Frequency Response

Frequency response in sealed enclosure.

Thiele-Small Parameters

Parameter Details

Key Thiele-Small parameters for enclosure design.

Sealed Enclosure Cone Excursion

Cone excursion in a sealed enclosure at 300W.

Vented Box Volume

Vented Enclosure Frequency Response

Frequency response in a vented enclosure.

Vented Enclosure Cone Excursion

Cone excursion in a vented enclosure at 300W.

Bandpass Box Volume

Bandpass Enclosure Frequency Response

Frequency response in a bandpass enclosure.

Bandpass Enclosure Cone Excursion

Cone excursion in a bandpass enclosure at 300W.