HARMAN KARDON BETATWELVEX
Service Manual

Beta TwelveX 12" Woofer � Technical Data
SEALED BOX VOLUME VENTED BOX VOLUME

length = 9.54"

Port
fo = 33 Hz

Beta TwelveX
(side view)

Beta TwelveX
(side view)

VBOX = 1.20 ft3 (33.98 liters)
(all sides lined with 1-inch fiberglass or fiberfill)

VBOX = 2.00 ft3 (56.64 liters)
(all sides lined with 1-inch fiberglass or fiberfill)

diameter = 4"

SEALED FREQUENCY RESPONSE @ 2.83 V
100 dB In-Car 12 dB LP @ 70 Hz 105 95 100

VENTED FREQUENCY RESPONSE @ 2.83 V
dB In-Car 12 dB LP @ 70 Hz

90 Out-Of-Car 85

95 Out-Of-Car 90

80

85

75

80

70

75

65

70

60 20 Frequency 50 100 Hz 200 500 1k

C

65 20 Frequency 50 100 Hz 200 500 1k

C

2k

2k

SEALED EXCURSION/GROUP DELAY @ 300 W
20.0 Xd mM T mSec 10.0 40 17.5 7.5 35

VENTED EXCURSION/GROUP DELAY @ 375 W
Xd mM T mSec 40 30

15.0 Group Delay 12.5

5.0

30

20

2.5

25 Group Delay

10

10.0

0.0

20

0

7.5

-2.5

15

-10

5.0 Transducer Excursion 2.5

-5.0

10

-20

-7.5

5

Transducer Excursion
C

-30

0.0 20 Frequency 50 100 Hz 200 500 1k

-10.0 2k
C

0 20 Frequency 50 100 Hz 200 500 1k

-40

2k

Ininfity Technical Data . . 8�45