JBL 1500 GTI User Manual

1500GTi 15" Woofer – Technical Data

SPECIFICATIONS

DIAMETER:			15" (0.59 MM)
SENSITIVITY (2.83 V @ 1 M):			94 dB
POWER HANDLING:			600 WRMS
FREQUENCY RESPONSE:			20 ~ 300 HZ
NOMINAL IMPEDANCE:			4 OHMS
VOICE-COIL DIAMETER:			4.0" (102.00 MM)
DIMENSIONS:

mounting depth 5.25" (133.35 mm)

IMPEDANCE CURVE

100.0	Ohms
30.0
10.0
3.0
1.0	20 Frequency	50	100 Hz	200	500	1k	2k

cutout diameter

INFINITE BAFFLE

14.00" (355.60 mm)

FREQUENCY RESPONSE @ 2.83 V

outer diameter

15.25" (387.35 mm)

105

dB In-Car

12 dB LP @ 75 Hz

			100
THIELE-SMALL PARAMETERS			95	Out-Of-Car
VOICE COIL DC RESISTANCE:	REVC (OHMS) . . . . . . 2.50		90
VOICE COIL INDUCTANCE @ 1 KHZ: LEVC (MH). . . . . . . . 0.98			85
DRIVER RADIATING AREA:	SD (IN2) . . . . . . . 135.34		80
	SD (CM2). . . . . . . 877.00		75
MOTOR FORCE FACTOR:	BL (TM) . . . . . . . . 13.49		70
COMPLIANCE VOLUME:	VAS (FT3). . . . . . . . . 8.01
			65
	VAS (LITERS). . . . . 188.95
				20 Frequency	50	100 Hz	200	500	1k	2 k
SUSPENSION COMPLIANCE:	CMS (µM/N) . . . . 173.00			INFINITE BAFFLE
MOVING MASS, AIR LOAD:	MMS (GRAMS) . . . . 119.52
MOVING MASS, DIAPHRAGM:	MMD (GRAMS). . . . 104.59			EXCURSION/GROUP DELAY @ 150 W
FREE-AIR RESONANCE:	FS (HZ) . . . . . . . . 35.00		20.0	Xd mM						T mSec	10.0
MECHANICAL Q:	QMS . . . . . . . . . . . . 5.80		17.5								7.5
ELECTRICAL Q:	QES . . . . . . . . . . . . 0.36		15.0								5.0
TOTAL Q:	QTS . . . . . . . . . . . . 0.34		12.5								2.5
MAGNETIC-GAP HEIGHT:	HAG (IN) . . . . . . . . . 0.32					Group Delay
			10.0								0.0
	HAG (MM)	. . . . . . . . 8.13
			7.5								-2.5
VOICE-COIL HEIGHT:	HVC (IN) . . . . . . . . . 0.75
	HVC (MM)	. . . . . . . 19.05	5.0								-5.0
MAXIMUM EXCURSION:	XMAX (IN)	. . . . . . . . 0.22	2.5			Transducer Excursion					-7.5
	XMAX (MM). . . . . . . . 5.46		0.0	20 Frequency	50	100 Hz	200	500	1k		-10.0
										2 k
							JBL Technical Data . . . . . 7•53

1500GTi 15" Woofer – Technical Data

SEALED

BOX VOLUME

GTi1500

(side view)

VBOX = 1.85 ft3 (52.39 liters)

(all sides lined with 1-inch fiberglass or fiberfill)

VENTED

BOX VOLUME

length = 9.46"	(2) Ports
GTi1500	fo = 39 Hz
(side view)
VBOX = 2.86 ft3 (81.00 liters)	diameter = 4.0"
(all sides lined with 1-inch fiberglass or fiberfill)

SEALED		VENTED
FREQUENCY RESPONSE @ 2.83 V		FREQUENCY RESPONSE @ 2.83 V

105

100

95

90

85

80

75

70

65

20.0

17.5

15.0

12.5

10.0

7.5

5.0

2.5

0

	dB	105	dB	In-Car
				12 dB LP @ 70 Hz

	In-Car							100
	12 dB LP @ 70 Hz
								95
	Out-Of-Car							90
								85	Out-Of-Car
								80
								75
								70
								65
20	Frequency	50	100 Hz	200	500	1k	2 k		20 Frequency	50	100 Hz	200	500	1k	2 k
SEALED									VENTED
EXCURSION/GROUP DELAY @ 500 W									EXCURSION/GROUP DELAY @ 600 W
Xd mM							T mSec 10.0	40	Xd mM						T mSec	20
							7.5	35								15
							5.0	30								10
							2.5	25								5
				Group Delay							Group Delay
							0.0	20								0
							-2.5	15								-5
							-5.0	10								-10
				Transducer Excursion			-7.5	5			Transducer Excursion					-15
							-10.0	0								-20
20	Frequency	50	100 Hz	200	500	1k	2 k		20 Frequency	50	100 Hz	200	500	1k	2 k

7•54 . . . . . JBL Technical Data