JBL P1220 User Manual

SPECIFICATIONS
DIAMETER: 12" (304.8 MM)
S
ENSITIVITY (2.83 V @ 1 M): 91 dB
P
OWER HANDLING: 400 W
RMS
(1,600 W
PEAK
)
F
REQUENCY RESPONSE: 20 ~ 450 HZ
NOMINAL IMPEDANCE:2 OHMS
VOICE-COIL DIAMETER: 3.0" (76.2 MM)
D
IMENSIONS:
THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE:R
EVC
(OHMS) . . . . . . 1.95
V
OICE COIL INDUCTANCE @ 1 KHZ:L
EVC
(MH) . . . . . . . 0.99
D
RIVER RADIATING AREA:S
D
(IN
2
) . . . . . . . . 74.71
S
D
(CM
2
) . . . . . . 482.00
M
OTOR FORCE FACTOR:BL (TM) . . . . . . . . 12.50
C
OMPLIANCE VOLUME:V
AS
(FT
3
) . . . . . . . . 1.67
V
AS
(LITERS) . . . . . 47.40
S
USPENSION COMPLIANCE:C
MS
(µM/N) . . . . 143.68
M
OVING MASS, AIR LOAD:M
MS
(GRAMS). . . . 214.80
MOVING MASS, DIAPHRAGM:M
MD
(GRAMS) . . . 208.72
F
REE-AIR RESONANCE:F
S
(HZ) . . . . . . . . 28.65
M
ECHANICAL Q: Q
MS
. . . . . . . . . . . 6.71
E
LECTRICAL Q: Q
ES
. . . . . . . . . . . . 0.48
T
OTAL Q: Q
TS
. . . . . . . . . . . . 0.45
M
AGNETIC-GAP HEIGHT:H
AG
(IN) . . . . . . . . . 0.47
H
AG
(MM) . . . . . . . 12.00
V
OICE-COIL HEIGHT:H
VC
(
IN) . . . . . . . . . 1.72
H
VC
(MM) . . . . . . . 43.80
M
AXIMUM EXCURSION:X
MAX
(IN) . . . . . . . . 0.63
X
MAX
(
MM) . . . . . . 15.90
SEALED BOX VOLUME
(INCLUDES DRIVER DISPLACEMENT)
SEALED
FREQUENCY RESPONSE @ 2.83 V
SEALED
TRANSDUCER EXCURSION @ 450 W
JBL Consumer Products • 250 Crossways Park Drive • Woodbury, NY 11797 • VOICE: 516-496-3400 • FAX: 516-496-4868 • www.jbl.com
P1220 12" Woofer – Technical Data
mounting depth
6.75" (172.00 mm)
cutout diameter
11.00" (280.00 mm)
outer diameter
12.31" (313.00 mm)
V
BOX
= 1.00 ft
3
(28.32 liters)
(stuffed with loosely-packed fiberfill)
P1220
(side view)
C
dB
100
95
90
85
80
75
70
65
60
20 Frequency 50 100 Hz 200 500 1k 2 k
Out-Of-Car
In-Car
12 dB LP @ 80 Hz
C
Xd mM
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
20 Frequency 50 100 Hz 200 500 1k 2 k

JBL P1220 Specifications

General

Power Handling (RMS)	300 Watts
Power Handling (Peak)	1200 Watts
Impedance	4 Ohms
Type	Car Subwoofer
Size	12 inches
Driver Size	12 inches
Enclosure Type	Optimized for both vented and sealed enclosures

Summary

Speaker Specifications and Parameters

General Specifications

Key electrical and physical parameters including diameter, sensitivity, power handling, frequency response, impedance, and voice coil dimensions.

Thiele-Small Parameters

Detailed acoustic and mechanical parameters like DC resistance, inductance, radiating area, compliance, mass, resonance, and excursion limits.

Sealed Enclosure Performance

Sealed Box Volume Recommendation

Recommended sealed enclosure volume (1.00 ft³) including driver displacement for optimal performance.

Sealed Enclosure Frequency Response

Frequency response graph for the woofer in a sealed enclosure at 2.83V sensitivity.

Sealed Enclosure Excursion Limits

Transducer excursion graph for the woofer in a sealed enclosure at 450W power handling.

Vented Enclosure Performance

Vented Box Volume Recommendation

Recommended vented enclosure volume (2.25 ft³) including driver and port displacement.

Vented Enclosure Frequency Response

Frequency response graph for the woofer in a vented enclosure at 2.83V sensitivity.

Vented Enclosure Excursion Limits

Transducer excursion graph for the woofer in a vented enclosure at 500W power handling.

Sealed Bandpass Enclosure Performance

Sealed Bandpass Box Volume

Recommended sealed bandpass enclosure volume (2.00 ft³ front, 1.50 ft³ rear).

Sealed Bandpass Frequency Response

Frequency response graph for the woofer in a sealed bandpass enclosure at 2.83V sensitivity.

Sealed Bandpass Excursion Limits

Transducer excursion graph for the woofer in a sealed bandpass enclosure at 400W power handling.