INFINITY REFERENCE1230W
Service Manual

Reference 1230w 12" Woofer � Technical Data
CAR AUDIO

SPECIFICATIONS
DIAMETER: SENSITIVITY (2.83 V @ 1 M): POWER HANDLING: FREQUENCY RESPONSE: NOMINAL IMPEDANCE: VOICE-COIL DIAMETER: DIMENSIONS: 12" (304.8 MM) 90 dB 300 WRMS1200 WPEAK 23 ~ 400 HZ 4 OHMS 2.0" (50.0 MM)

SEALED BOX VOLUME (INCLUDES DRIVER DISPLACEMENT)

Reference 1230w
(side view)

mounting depth 6.125" (155.58 mm)

VBOX = 1.25 ft3 (35.40 liters)
(all sides lined with 1-inch fiberglass or fiberfill)

cutout diameter 11.25" (286 mm) outer diameter 12.375" (315 mm)

SEALED FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 80 Hz 95

THIELE-SMALL PARAMETERS
VOICE COIL DC RESISTANCE: R
EVC

90 85

Out-Of-Car

(OHMS) . . . . . . 3.40 (MH) . . . . . . . 2.54

VOICE COIL INDUCTANCE @ 1 KHZ: L DRIVER RADIATING AREA: MOTOR FORCE FACTOR: COMPLIANCE VOLUME: SUSPENSION COMPLIANCE: MOVING MASS, AIR LOAD: MOVING MASS, DIAPHRAGM: FREE-AIR RESONANCE: MECHANICAL Q: ELECTRICAL Q: TOTAL Q: MAGNETIC-GAP HEIGHT: VOICE-COIL HEIGHT: MAXIMUM EXCURSION:

EVC

80 75 70

S D (IN 2) . . . . . . . . 82.48 S D (M2) . . . . . . . 532.00 BL (TM) . . . . . . . . 14.63 VAS (FT3) . . . . . . . . 2.78 VAS (LITERS) . . . . . 78.50 C MS (µM/N) . . . . 195.40 MMS (GRAMS). . . . 174.21 MMD (GRAMS) . . . 167.15 FS (HZ) . . . . . . . . 27.27 Q MS . . . . . . . . . . . 6.14 Q ES . . . . . . . . . . . . 0.47 Q TS . . . . . . . . . . . . 0.44 HAG (IN) . . . . . . . . 32.50 HAG (MM) . . . . . . . . 8.00 HVC (IN) . . . . . . . . . 1.27 HVC (MM) . . . . . . . 32.50 X MAX (IN) . . . . . . . . 0.49 X MAX (MM) . . . . . . 12.25

65
C

60 20 Frequency 50 100 Hz 200 500 1k

2k

SEALED EXCURSION/GROUP DELAY @ 300 W
20.0 Xd mM 17.5 15.0 T mSec 20 15 10

12.5

Group Delay

5

10.0

0

7.5

-5

5.0 2.5 0.0 20 Frequency 50 100 Hz 200 500 1k Transducer Excursion
C

-10 -15 -20

2k

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