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3” RED

3” BLK

3” RED

3” BLK

JBL Incorporated, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329  U.S.A.

JBL

SF12Mi

REV C

PACKAGE

WIRING DIAGRAM

04-10

Technical Manual

JBL SF12Mi

SPECIFICATIONS

ACOUSTIC & ELECTRICAL SPECIFICATIONS:

• Nominal Impedance:

8 Ohms

• Power Capacity:

250W, Peak Power Capacity 1000W

• Frequency Range:

60 Hz – 16 kHz (–10dB)  

• Sensitivity:

99 dB, 1Watt @ 1 Meter

• Crossover Frequency:

1.8 kHz

SYSTEM COMPONENTS:

Cabinet:

Enclosure (Not for Sale)

• Grille:

339256-001

• Low Frequency

M112-8, 304.8mm (12 in.) Cone 

Transducer:

Transducer

• DC Resistance:

5.2 ohms 

• High Frequency

2412H-1, 25.4mm (1 in.) Exit 

Transducer:

Compression Driver 

SYSTEM COMPONENTS:

(Cont’d) 

• DC Resistance:

4.3 ohms

• Crossover Network:

339119-001

AURAL SWEEP TEST SPECIFICATIONS:

A. System Aural Sweep Test:

7.0V Input, 20 Hz to 20 kHz

B. L.F. Aural Sweep Test:

7.0V Input, 20 Hz to 1.2 kHz

C. H.F. Aural Sweep Test:

2.83V Input, 500 Hz to 20 kHz 

PHYSICAL SPECIFICATIONS:

• Enclosure Dimensions:

584.2 x  393.7 x 317.5 D
(23.0 x 15.5 x 12.6 in.D)

Shipping Weight:

48.5 lb (22 kg.)

WARRANTY INFORMATION:

• Refer to Warranty Statement packed with each product.

Warranty 59660
User Guide, 351940-001

GRN/BLK

YEL/BLK

YEL

+

W

W

T

+

T

1

+

1

Phone Jack

J1

1/4” Phone Jack

Panel

J2

NL4MP-1

Connector

NL4MP-1 Conn

L3
0.4 mH

L4
0.3 mH

L2
3.4 mH

L1
1.3 mH

R3
10 , 25W

R1
18  
20W

R2
7.5 , 10W

C1
8.0µF, 200V

C4
12µF 
250V

C2
2.7µF 
200V

C3
8.0µF, 100V

GRN

GRN/BLK

YEL/BLK

YEL

GRN

LP1 LP2

LF Woofer

HF Driver

Network
Assembly
339119-001

Low Freq
M112-8
(336961-001X)

Driver, High Freq
2412H-1
(339013-001X)

NETWORK SCHEMATIC - (339119-001)

Carton
351889-001

Filler (2)
339078-001

PKG,Microfoam (4)
49790P

Pad (2)
351890-001

Rigging
Hardware Kit
229-00009-01

2

+

, 2

Not Connected

SK3

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